AMD SC2200 User Manual

AMD Geode™ SC2200 Processor Data Book

March 2006

Publication ID: 32580B

AMD Geode™ SC2200 Processor Data Book

The contents of this document are provided in connection with Advanced Micro Devices, Inc. (“AMD”) products. AMD makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication and reserves the right to make changes to specifications and product descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this publication. Except as set forth in AMD’s Standard Terms and Conditions of Sale, AMD assumes no liability whatsoever, and disclaims any express or implied warranty, relating to its products including, but not limited to, the implied warranty of merchantability, fitness for a particular purpose, or infringement of any intellectual property right.

AMD’s products are not designed, intended, authorized or warranted for use as components in systems intended for surgical implant into the body, or in other applications intended to support or sustain life, or in any other application in which the failure of AMD’s product could create a situation where personal injury, death, or severe property or environmental damage may occur. AMD reserves the right to discontinue or make changes to its products at any time without notice.

Contacts

www.amd.com

Trademarks

AMD, the AMD Arrow logo, and combinations thereof, and Geode and Virtual System Architecture are trademarks of Advanced Micro Devices, Inc.

Microsoft and Windows are registered trademarks of Microsoft Corporation in the United States and/or other jurisdictions.

MMX is a registered trademark of Intel Corporation in the United States and/or other jurisdictions.

Other product names used in this publication are for identification purposes only and may be trademarks of their respective companies.

2 AMD Geode™ SC2200 Processor Data Book

Contents 32580B

Contents

List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.0 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.0 Architecture Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.1 GX1 Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.2 Video Processor Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.3 Core Logic Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2.4 SuperI/O Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2.5 Clock, Timers, and Reset Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.0 Signal Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.1 Ball Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

3.2 Strap Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

3.3 Multiplexing Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

3.4 Signal Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

4.0 General Configuration Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

4.1 Configuration Block Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

4.2 Multiplexing, Interrupt Selection, and Base Address Registers . . . . . . . . . . . . . . . . . . . . . . . . . 76

4.3 WATCHDOG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

4.4 High-Resolution Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

4.5 Clock Generators and PLLs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

5.0 SuperI/O Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

5.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

5.2 Module Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

5.3 Configuration Structure/Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

5.4 Standard Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

5.5 Real-Time Clock (RTC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

5.6 System Wakeup Control (SWC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

5.7 ACCESS.bus Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

5.8 Legacy Functional Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

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6.0 Core Logic Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

6.1 Feature List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

6.2 Module Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

6.3 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

6.4 Chipset Register Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

7.0 Video Processor Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319

7.1 Module Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320

7.2 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321

7.3 Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338

8.0 Debugging and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365

8.1 Testability (JTAG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365

8.2 Engineering Note: Carmel Rev B1 - DFT ACP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 366

9.0 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369

9.1 General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369

9.2 DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379

9.3 AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 384

10.0 Package Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 443

10.1 Thermal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 443

10.2 Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445

Appendix A Support Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 447

A.1 Order Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 447

A.2 Data Book Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 448

4 AMD Geode™ SC2200 Processor Data Book

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List of Figures

Figure 1-1. Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 3-1. Signal Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 3-2. BGU481 Ball Assignment Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 4-1. WATCHDOG Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Figure 4-2. Clock Generation Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Figure 4-3. Recommended Oscillator External Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Figure 4-4. PLL3 and Dividers Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Figure 5-1. SIO Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Figure 5-2. Detailed SIO Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Figure 5-3. Structure of the Standard Configuration Register File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Figure 5-4. Standard Configuration Registers Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Figure 5-5. Recommended Oscillator External Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Figure 5-6. External Oscillator Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Figure 5-7. Divider Chain Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Figure 5-8. Power Supply Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Figure 5-9. Typical Battery Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Figure 5-10. Typical Battery Current: Battery Backed Power Mode @ T

Figure 5-11. Typical Battery Current: Normal Operation Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Figure 5-12. Interrupt/Status Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Figure 5-13. Bit Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Figure 5-14. Start and Stop Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Figure 5-15. ACCESS.bus Data Transaction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Figure 5-16. ACCESS.bus Acknowledge Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Figure 5-17. A Complete ACCESS.bus Data Transaction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Figure 5-18. UART Mode Register Bank Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Figure 5-19. IRCP/SP3 Register Bank Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Figure 6-1. Core Logic Module Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Figure 6-2. Non-Posted Fast-PCI to ISA Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Figure 6-3. PCI to ISA Cycles with Delayed Transaction Enabled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

Figure 6-4. ISA DMA Read from PCI Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Figure 6-5. ISA DMA Write to PCI Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Figure 6-6. PCI Change to Sub-ISA and Back . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Figure 6-7. PIT Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Figure 6-8. PIC Interrupt Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

Figure 6-9. PCI and IRQ Interrupt Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Figure 6-10. SMI Generation for NMI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Figure 6-11. General Purpose Timer and UDEF Trap SMI Tree Example . . . . . . . . . . . . . . . . . . . . . . . . 173

Figure 6-12. PRD Table Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

Figure 6-13. AC97 V2.0 Codec Signal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

Figure 6-14. Audio SMI Tree Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Figure 6-15. Typical Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Figure 7-1. Video Processor Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320

Figure 7-2. NTSC 525 Lines, 60 Hz, Odd Field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322

Figure 7-3. NTSC 525 Lines, 60 Hz, Even Field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322

Figure 7-4. VIP Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323

= 25°C . . . . . . . . . . . . . . . . . 114

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Figure 7-5. Capture Video Mode Bob Example Using One Video Frame Buffer . . . . . . . . . . . . . . . . . . 325

Figure 7-6. Capture Video Mode Weave Example Using Two Video Frame Buffers . . . . . . . . . . . . . . . 326

Figure 7-7. Video Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327

Figure 7-8. Horizontal Downscaler Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328

Figure 7-9. Linear Interpolation Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329

Figure 7-10. Mixer/Blender Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330

Figure 7-11. Graphics/Video Frame with Alpha Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332

Figure 7-12. Color Key and Alpha Blending Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334

Figure 7-13. DAC Voltage Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335

Figure 7-14. TFT Power Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336

Figure 7-15. PLL Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337

Figure 9-1. Differential Input Sensitivity for Common Mode Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 382

Figure 9-2. General Drive level and Measurement Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 384

Figure 9-3. Drive Level and Measurement Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 385

Figure 9-4. Memory Controller Output Valid Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 387

Figure 9-5. Read Data In Setup and Hold Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 387

Figure 9-6. Video Input Port Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 388

Figure 9-7. TFT Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 389

Figure 9-8. ACB Signals: Rising Time and Falling Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 392

Figure 9-9. ACB Start and Stop Condition Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 392

Figure 9-10. ACB Start Condition Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 393

Figure 9-11. ACB Data Bit Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 393

Figure 9-12. Testing Setup for Slew Rate and Minimum Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 394

Figure 9-13. V/I Curves for PCI Output Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 395

Figure 9-14. PCICLK Timing and Measurement Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396

Figure 9-15. Load Circuits for Maximum Time Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 397

Figure 9-16. Output Timing Measurement Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 398

Figure 9-17. Input Timing Measurement Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 399

Figure 9-18. PCI Reset Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 399

Figure 9-19. Sub-ISA Read Operation Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 402

Figure 9-20. Sub-ISA Write Operation Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 403

Figure 9-21. LPC Output Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404

Figure 9-22. LPC Input Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404

Figure 9-23. IDE Reset Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 405

Figure 9-24. Register Transfer to/from Device Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407

Figure 9-25. PIO Data Transfer to/from Device Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409

Figure 9-26. Multiword DMA Data Transfer Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 411

Figure 9-27. Initiating an UltraDMA Data in Burst Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413

Figure 9-28. Sustained UltraDMA Data In Burst Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 414

Figure 9-29. Host Pausing an UltraDMA Data In Burst Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 415

Figure 9-30. Device Terminating an UltraDMA Data In Burst Timing Diagram . . . . . . . . . . . . . . . . . . . . 416

Figure 9-31. Host Terminating an UltraDMA Data In Burst Timing Diagram . . . . . . . . . . . . . . . . . . . . . . 417

Figure 9-32. Initiating an UltraDMA Data Out Burst Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 418

Figure 9-33. Sustained UltraDMA Data Out Burst Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 419

Figure 9-34. Device Pausing an UltraDMA Data Out Burst Timing Diagram . . . . . . . . . . . . . . . . . . . . . . 420

Figure 9-35. Host Terminating an UltraDMA Data Out Burst Timing Diagram . . . . . . . . . . . . . . . . . . . . . 421

Figure 9-36. Device Terminating an UltraDMA Data Out Burst Timing Diagram . . . . . . . . . . . . . . . . . . . 422

Figure 9-37. Data Signal Rise and Fall Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 425

Figure 9-38. Source Differential Data Jitter Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 425

Figure 9-39. EOP Width Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426

Figure 9-40. Receiver Jitter Tolerance Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426

Figure 9-41. UART, Sharp-IR, SIR, and Consumer Remote Control Timing Diagram . . . . . . . . . . . . . . . 427

Figure 9-42. Fast IR (MIR and FIR) Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 428

Figure 9-43. Standard Parallel Port Typical Data Exchange Timing Diagram . . . . . . . . . . . . . . . . . . . . . 429

Figure 9-44. Enhanced Parallel Port Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 430

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Figure 9-45. ECP Forward Mode Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 431

Figure 9-46. ECP Reverse Mode Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 432

Figure 9-47. AC97 Reset Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 433

Figure 9-48. AC97 Sync Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 433

Figure 9-49. AC97 Clocks Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 434

Figure 9-50. AC97 Data TIming Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 435

Figure 9-51. AC97 Rise and Fall Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 436

Figure 9-52. AC97 Low Power Mode Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 437

Figure 9-53. PWRBTN# Trigger and ONCTL# Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 438

Figure 9-54. GPWIO and ONCTL# Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 438

Figure 9-55. Power-Up Sequencing With PWRBTN# Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 439

Figure 9-56. Power-Up Sequencing Without PWRBTN# Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . 440

Figure 9-57. TCK Measurement Points and Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 441

Figure 9-58. JTAG Test Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 442

Figure 10-1. Heatsink Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 444

Figure 10-2. BGU481 Package - Top View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445

Figure 10-3. BGU481 Package - Bottom View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 446

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8 AMD Geode™ SC2200 Processor Data Book

List of Tables 32580B

List of Tables

Table 2-1. SC2200 Memory Controller Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 2-2. SC2200 Memory Controller Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Table 3-1. Signal Definitions Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 3-2. BGU481 Ball Assignment - Sorted by Ball Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 3-3. BGU481 Ball Assignment - Sorted Alphabetically by Signal Name . . . . . . . . . . . . . . . . . . . 41

Table 3-4. Strap Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Table 3-5. Two-Signal/Group Multiplexing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Table 3-6. Three-Signal/Group Multiplexing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Table 3-7. Four-Signal/Group Multiplexing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Table 4-1. General Configuration Block Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Table 4-2. Multiplexing, Interrupt Selection, and Base Address Registers . . . . . . . . . . . . . . . . . . . . . . . 76

Table 4-3. WATCHDOG Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Table 4-4. High-Resolution Timer Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Table 4-5. Crystal Oscillator Circuit Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Table 4-6. Core Clock Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Table 4-7. Strapped Core Clock Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Table 4-8. PLL3 Clock Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Table 4-9. Clock Generator Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Table 5-1. SIO Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Table 5-2. LDN Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Table 5-3. Standard Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Table 5-4. SIO Control and Configuration Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Table 5-5. SIO Control and Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Table 5-6. Relevant RTC Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Table 5-7. RTC Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Table 5-8. Relevant SWC Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Table 5-9. Relevant IRCP/SP3 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Table 5-10. IRCP/SP3 Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Table 5-11. Relevant Serial Ports 1 and 2 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Table 5-12. Serial Ports 1 and 2 Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Table 5-13. Relevant ACB1 and ACB2 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Table 5-14. ACB1 and ACB2 Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Table 5-15. Relevant Parallel Port Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Table 5-16. Parallel Port Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Table 5-17. Crystal Oscillator Circuit Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Table 5-18. System Power States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Table 5-19. RTC Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Table 5-20. RTC Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Table 5-21. Divider Chain Control / Test Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Table 5-22. Periodic Interrupt Rate Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Table 5-23. BCD and Binary Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Table 5-24. Standard RAM Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Table 5-25. Extended RAM Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Table 5-26. Time Range Limits for CEIR Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Table 5-27. Banks 0 and 1 - Common Control and Status Register Map . . . . . . . . . . . . . . . . . . . . . . . . 124

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Table 5-28. Bank 1 - CEIR Wakeup Configuration and Control Register Map . . . . . . . . . . . . . . . . . . . . 124

Table 5-29. Banks 0 and 1 - Common Control and Status Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Table 5-30. Bank 1 - CEIR Wakeup Configuration and Control Registers . . . . . . . . . . . . . . . . . . . . . . . 126

Table 5-31. ACB Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Table 5-32. ACB Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Table 5-33. Parallel Port Register Map for First Level Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Table 5-34. Parallel Port Register Map for Second Level Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Table 5-35. Parallel Port Bit Map for First Level Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Table 5-36. Parallel Port Bit Map for Second Level Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Table 5-37. Bank 0 Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Table 5-38. Bank Selection Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Table 5-39. Bank 1 Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Table 5-40. Bank 2 Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Table 5-41. Bank 3 Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Table 5-42. Bank 0 Bit Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Table 5-43. Bank 1 Bit Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Table 5-44. Bank 2 Bit Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Table 5-45. Bank 3 Bit Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Table 5-46. Bank 0 Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Table 5-47. Bank Selection Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Table 5-48. Bank 1 Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Table 5-49. Bank 2 Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Table 5-50. Bank 3 Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Table 5-51. Bank 4 Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Table 5-52. Bank 5 Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Table 5-53. Bank 6 Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Table 5-54. Bank 7 Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Table 5-55. Bank 0 Bit Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Table 5-56. Bank 1 Bit Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Table 5-57. Bank 2 Bit Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Table 5-58. Bank 3 Bit Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Table 5-59. Bank 4 Bit Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Table 5-60. Bank 5 Bit Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Table 5-61. Bank 6 Bit Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Table 5-62. Bank 7 Bit Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Table 6-1. Physical Region Descriptor Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Table 6-2. UltraDMA/33 Signal Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Table 6-3. Cycle Multiplexed PCI / Sub-ISA Balls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Table 6-4. PIC Interrupt Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

Table 6-5. Wakeup Events Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Table 6-6. Power Planes Control Signals vs. Sleep States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Table 6-7. Power Planes vs. Sleep/Global States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Table 6-8. Power Management Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Table 6-9. Device Power Management Programming Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

Table 6-10. Bus Masters That Drive Specific Slots of the AC97 Interface . . . . . . . . . . . . . . . . . . . . . . . 175

Table 6-11. Physical Region Descriptor Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

Table 6-12. Cycle Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

Table 6-13. PCI Configuration Address Register (0CF8h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Table 6-14. F0: PCI Header/Bridge Configuration Registers for GPIO and LPC Support Summary . . . 184

Table 6-15. F0BAR0: GPIO Support Registers Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Table 6-16. F0BAR1: LPC Support Registers Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Table 6-17. F1: PCI Header Registers for SMI Status and ACPI Support Summary . . . . . . . . . . . . . . . 188

Table 6-18. F1BAR0: SMI Status Registers Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Table 6-19. F1BAR1: ACPI Support Registers Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

Table 6-20. F2: PCI Header Registers for IDE Controller Support Summary . . . . . . . . . . . . . . . . . . . . . 190

10 AMD Geode™ SC2200 Processor Data Book

List of Tables

32580B

Table 6-21. F2BAR4: IDE Controller Support Registers Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Table 6-22. F3: PCI Header Registers for Audio Support Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Table 6-23. F3BAR0: Audio Support Registers Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

Table 6-24. F5: PCI Header Registers for X-Bus Expansion Support Summary . . . . . . . . . . . . . . . . . . 193

Table 6-25. F5BAR0: I/O Control Support Registers Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

Table 6-26. PCIUSB: USB PCI Configuration Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Table 6-27. USB_BAR: USB Controller Registers Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

Table 6-28. ISA Legacy I/O Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

Table 6-29. F0: PCI Header/Bridge Configuration Registers for GPIO and LPC Support . . . . . . . . . . . 198

Table 6-30. F0BAR0+I/O Offset: GPIO Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

Table 6-31. F0BAR1+I/O Offset: LPC Interface Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . 237

Table 6-32. F1: PCI Header Registers for SMI Status and ACPI Support . . . . . . . . . . . . . . . . . . . . . . . 245

Table 6-33. F1BAR0+I/O Offset: SMI Status Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246

Table 6-34. F1BAR1+I/O Offset: ACPI Support Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255

Table 6-35. F2: PCI Header/Channels 0 and 1 Registers for IDE Controller Configuration . . . . . . . . . . 266

Table 6-36. F2BAR4+I/O Offset: IDE Controller Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . 270

Table 6-37. F3: PCI Header Registers for Audio Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272

Table 6-38. F3BAR0+Memory Offset: Audio Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . 273

Table 6-39. F5: PCI Header Registers for X-Bus Expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

Table 6-40. F5BAR0+I/O Offset: X-Bus Expansion Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290

Table 6-41. PCIUSB: USB PCI Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292

Table 6-42. USB_BAR+Memory Offset: USB Controller Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295

Table 6-43. DMA Channel Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305

Table 6-44. DMA Page Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310

Table 6-45. Programmable Interval Timer Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311

Table 6-46. Programmable Interrupt Controller Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313

Table 6-47. Keyboard Controller Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316

Table 6-48. Real-Time Clock Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317

Table 6-49. Miscellaneous Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317

Table 7-1. Valid Mixing/Blending Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331

Table 7-2. Truth Table for Alpha Blending . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333

Table 7-3. F4: PCI Header Registers for Video Processor Support Summary . . . . . . . . . . . . . . . . . . . 338

Table 7-4. F4BAR0: Video Processor Configuration Registers Summary . . . . . . . . . . . . . . . . . . . . . . 338

Table 7-5. F4BAR2: VIP Support Registers Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340

Table 7-6. F4: PCI Header Registers for Video Processor Support Registers . . . . . . . . . . . . . . . . . . . 341

Table 7-7. F4BAR0+Memory Offset: Video Processor Configuration Registers . . . . . . . . . . . . . . . . . . 343

Table 7-8. F4BAR2+Memory Offset: VIP Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 360

Table 8-1. JTAG Mode Instruction Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365

Table 8-2. Test Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 366

Table 8-3. Observe Clocks Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 366

Table 8-4. Bypass Clocks Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 366

Table 8-5. Vodka_C Scan Clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367

Table 8-6. Vodka Scan Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367

Table 8-7. BhargavaB Scan Clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367

Table 8-8. BhargavaB Scan Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367

Table 8-9. Vodka Internal Test Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 368

Table 8-10. BhargavaB Internal Test Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 368

Table 9-1. Electro Static Discharge (ESD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369

Table 9-2. Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369

Table 9-3. Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370

Table 9-4. Power Planes of External Interface Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 371

Table 9-5. System Conditions Used to Measure SC2200 Current During the On State . . . . . . . . . . . . 372

Table 9-6. DC Characteristics for On State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 372

Table 9-7. DC Characteristics for Active Idle, Sleep, and Off States . . . . . . . . . . . . . . . . . . . . . . . . . . 373

Table 9-8. Ball Capacitance and Inductance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 374

AMD Geode™ SC2200 Processor Data Book 11

32580B

List of Tables

Table 9-9. Balls with PU/PD Resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375

Table 9-10. PLL4 (48 MHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 376

Table 9-11. PLL3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 376

Table 9-12. PLL6 (57.273 MHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 377

Table 9-13. PLL2 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 377

Table 9-14. PLL5 (66.67 MHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378

Table 9-15. Buffer Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379

Table 9-16. Default Levels for Measurement of Switching Parameters . . . . . . . . . . . . . . . . . . . . . . . . . 384

Table 9-17. Memory Controller Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 386

Table 9-18. Video Input Port Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 388

Table 9-19. TFT Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 389

Table 9-20. CRT VESA Compatible DAC (RED, GREEN, and BLUE Outputs) . . . . . . . . . . . . . . . . . . . 390

Table 9-21. ACCESS.bus Input Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 391

Table 9-22. ACCESS.bus Output Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 391

Table 9-23. PCI AC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 394

Table 9-24. PCI Clock Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396

Table 9-25. PCI Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 397

Table 9-26. Measurement Condition Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 398

Table 9-27. Sub-ISA Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400

Table 9-28. LPC and SERIRQ Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404

Table 9-29. IDE General Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 405

Table 9-30. IDE Register Transfer to/from Device Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 406

Table 9-31. IDE PIO Data Transfer to/from Device Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . 408

Table 9-32. IDE Multiword DMA Data Transfer Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 410

Table 9-33. IDE UltraDMA Data Burst Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 412

Table 9-34. USB Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423

Table 9-35. UART, Sharp-IR, SIR, and Consumer Remote Control Timing Parameters . . . . . . . . . . . . 427

Table 9-36. Fast IR Port Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 428

Table 9-37. Standard Parallel Port Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429

Table 9-39. ECP Forward Mode Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 431

Table 9-40. ECP Reverse Mode Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 432

Table 9-41. AC Reset Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 433

Table 9-42. AC97 Sync Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 433

Table 9-43. AC97 Clocks Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 434

Table 9-44. AC97 I/O Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 435

Table 9-45. AC97 Signal Rise and Fall Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 436

Table 9-46. AC97 Low Power Mode Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 437

Table 9-47. PWRBTN# Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 438

Table 9-48. Power Management Event (GPWIO) and ONCTL# Timing Parameters . . . . . . . . . . . . . . . 438

Table 9-49. Power-Up Sequence Using the Power Button Timing Parameters . . . . . . . . . . . . . . . . . . . 439

Table 9-50. Power-Up Sequence Not Using the Power Button Timing Parameters . . . . . . . . . . . . . . . . 440

Table 9-51. JTAG Timing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 441

Table 10-1. q

(×C/W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 443

Table 10-2. Case-to-Ambient Thermal Resistance Example @ 85×C . . . . . . . . . . . . . . . . . . . . . . . . . . 443

Table A-1. Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 448

Table A-2. Edits to Current Revision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 449

12 AMD Geode™ SC2200 Processor Data Book

Overview 32580B

1.0Overview

1.1 General Description

The AMD Geode™ SC2200 processor is a member of the AMD Geode processor family of fully integrated x86 system chips. The SC2200 processor includes:

• The Geode GX1 processor module combines advanced CPU performance with MMX™ support, fully accelerated 2D graphics, a 64-bit synchronous DRAM (SDRAM) interface, a PCI bus controller, and a display controller.

• A low-power CRT and TFT Video Processor module with a Video Input Port (VIP), and a hardware video accelerator for scaling, filtering, and color space conversion.

• The Core Logic module includes: PC/AT functionality, a USB interface, an IDE interface, a PCI bus interface, an LPC bus interface, Advanced Configuration Power Interface (ACPI) version 1.0 compliant power management, and an audio codec interface.

• The SuperI/O module has: three Serial Ports (UART1, UART2, and UART3 with fast infrared), a Parallel Port, two ACCESS.bus (ACB) interfaces, and a Real-Time Clock (RTC).

These features, combined with the device’s low power consumption, enable a small form factor design making it ideal as the core for a thin client application.

GX1

CPU Core

IDE I/F

USB

PCI/Sub-ISA

Bus I/F

GPIO

Audio Codec I/F

LPC I/F

Memory Controller

2D Graphics

Accelerator

PCI Bus

Controller

Display

Controller

Fast-PCI Bus

Bridge

PCI Bus

X-Bus

Config.

Block

Fast X-Bus

Core Logic

PIT

PIC

DMAC

Pwr Mgmnt

Configuration

ISA Bus I/F

Figure 1-1 shows the relationships between the modules.

Video Processor

CRT I/F

RTC

I/F

Video Mixer

Clock & Reset Logic

TFT I/F

Parallel

Por t

ACB1

I/F

ACB2

I/F

UART1

UART2

UART3

& IR

Video

Scaling

Video Input Port (VIP)

Host Interface

SuperI/O

ISA Bus

Figure 1-1. Block Diagram

AMD Geode™ SC2200 Processor Data Book 13

1.2 Features

32580B

Overview

General Features

■ 32-Bit x86 processor, up to 300 MHz, with MMX

instruction set support

■ Memory controller with 64-bit SDRAM interface

■ 2D graphics accelerator

■ CRT controller with hardware video accelerator

■ CCIR-656 video input port with direct video for full

screen display

■ PC/AT functionality

■ PCI bus controller

■ IDE interface, two channels

■ USB, three ports, OHCI (OpenHost Controller Interface)

version 1.0 compliant

■ Audio, AC97/AMC97 version 2.0 compliant

■ Virtual System Architecture™ (VSA) technology support

■ Power management, ACPI (Advanced Configuration

Power Interface) version 1.0 compliant

■ Package:

— BGU481 (481-Terminal Ball Grid Array Cavity Up)

GX1 Processor Module

■ CPU Core:

— 32-Bit x86, 300 MHz, with MMX compatible instruc-

tion set support — 16 KB unified L1 cache — Integrated FPU (Floating Point Unit) — Re-entrant SMM (System Management Mode)

enhanced for VSA

■ 2D Graphics Accelerator:

— Accelerates BitBLTs, line draw and text — Supports all 256 raster operations — Supports transparent BLTs — Runs at core clock frequency

■ Memory Controller:

— 64-Bit SDRAM interface — 66 MHz to 100 MHz frequency range — Direct interface with CPU/cache, display controller

and 2D graphic accelerator — Supports clock suspend and power-down/

self-refresh — Up to two banks of SDRAM (8 devices total) or one

SODIMM

■ Display Controller:

— Hardware graphics frame buffer compress/

decompress — Hardware cursor, 32x32 pixels

Video Processor Module

■ Video Accelerator:

— Flexible video scaling support of up to 8x

(horizontally and vertically)

— Bilinear interpolation filters (with two taps, and eight

phases) to smooth output video

■ Video/Graphics Mixer:

— 8-bit value alpha blending — Three blending windows with constant alpha value — Color key

■ Video Input Port (VIP):

— Video capture or display — CCIR-656 and VESA Video Interface Port v1.1

compliant — Lock display timing to video input timing (GenLock) — Able to transfer video data into main memory — Direct video transfer for full screen display — Separate memory location for VBI

■ CRT Interface:

— Uses three 8-bit DACs — Supports up to 135 MHz — 1280x1024 non-interlaced CRT @ 8 bpp, up to 75 Hz — 1024x768 non-interlaced CRT @ 16 bpp, up to 85 Hz

■ TFT Interface:

— Direct connection to TFT panels — 800x600 non-interlaced TFT @ 16 bpp graphics,

up to 85 Hz — 1024x768 non-interlaced TFT @ 16 bpp graphics,

up to 75 Hz — TFT on IDE: FPCLK max is 40 MHz — TFT on Parallel Port: FPCLK max is 80 MHz

Core Logic Module

■ Audio Codec Interface:

— AC97/AMC97 (Rev. 2.0) codec interface — Six DMA channels

■ PC/AT Functionality:

— Programmable Interrupt Controller (PIC),

8259A-equivalent — Programmable Interval Timer (PIT), 8254-equivalent — DMA Controller (DMAC), 8237-equivalent

■ Power Management:

— ACPI v1.0 compliant — Sx state control of three power planes — Cx/Sx state control of clocks and PLLs — Thermal event input — Wakeup event support:

– Three general-purpose events

– AC97 codec event

– UART2 RI# signal

– Infrared (IR) event

14 AMD Geode™ SC2200 Processor Data Book

Overview

32580B

■

General Purpose I/Os (GPIOs): — 27 multiplexed GPIO signals

■ Low Pin Count (LPC) Bus Interface:

— Specification v1.0 compatible

■ PCI Bus Interface:

— PCI v2.1 compliant with wakeup capability — 32-Bit data path, up to 33 MHz — Glueless interface for an external PCI device — Fixed priority — 3.3V signal support only

■ Sub-ISA Bus Interface:

— Up to 16 MB addressing — Supports a chip select for ROM or Flash EPROM

boot device

— Supports either:

– M-Systems DiskOnChip DOC2000 Flash file

system

– NAND EEPROM

— Supports up to two chip selects for external I/O

devices — 8-Bit (optional 16-bit) data bus width — Shares balls with PCI signals — Is not a subtractive agent

■ IDE Interface:

— Two IDE channels for up to four external IDE devices — Supports ATA-33 synchronous DMA mode transfers,

up to 33 MB/s

■ Universal Serial Bus (USB):

— USB OpenHCI v1.0 compliant — Three ports

Other Features

■ High-Resolution Timer:

— 32-Bit counter with 1 μs count interval

■ WATCHDOG Timer:

— Interfaces to INTR, SMI, Reset

■ Clocks:

— Input (external crystals):

– 32.768 KHz (internal clock oscillator) – 27 MHz (internal clock oscillator)

—Output:

– AC97 clock (24.576 MHz) – Memory controller clock (66 MHz to 100 MHz) – PCI clock (33 MHz)

■ JTAG Testability:

— Bypass, Extest, Sample/Preload, IDcode, Clamp, HiZ

■ Voltages:

— Internal logic:

– 233 MHz @ 1.8V – 266 MHz @ 1.8V – 300 MHz @ 2.1V

— Standby logic:

– 233 MHz @ 1.8V – 266 MHz @ 1.8V – 300 MHz @ 2.1V

— I/O: 3.3V — Standby I/O: 3.3V — Battery (if used): 3.0V

SuperI/O Module

■ Real-Time Clock (RTC):

— DS1287, MC146818 and PC87911 compatible — Multi-century calendar

■ ACCESS.bus (ACB) Interface:

— Two ACB interface ports

■ Parallel Port:

— EPP 1.9 compliant — IEEE 1284 ECP compliant, including level 2

■ Serial Port (UART):

— UART1, 16550A compatible (SIN, SOUT, BOUT

pins), used for SmartCard interface — UART2, 16550A compatible — Enhanced UART with fast Infrared (IR)

AMD Geode™ SC2200 Processor Data Book 15

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Overview

16 AMD Geode™ SC2200 Processor Data Book

Architecture Overview 32580B

2.0Architecture Overview

As illustrated in Figure 1-1 on page 13, the SC2200 processor contains the following modules in one integrated device:

• GX1 Module: — Combines advanced CPU performance with MMX

support, fully accelerated 2D graphics, a 64-bit synchronous DRAM (SDRAM) interface and a PCI bus controller. Integrates GX1 silicon revision 8.1.1.

• Video Processor Module: — A low-power CRT and TFT support module with a

video input port, and a hardware video accelerator for scaling, filtering and color space conversion.

• Core Logic Module: — Includes PC/AT functionality, an IDE interface, a

Universal Serial Bus (USB) interface, ACPI 1.0 compliant power management, and an audio codec interface.

• SuperI/O Module: — Includes two Serial Ports, an Infrared (IR) Port, a

Parallel Port, two ACCESS.bus interfaces, and a Real-Time Clock (RTC).

2.1 GX1 Module

The GX1 processor (silicon revision 8.1.1) is the central module of the SC2200. For detailed information regarding the GX1 module, refer to the AMD Geode™ GX1 Proces-

sor Data Book and the AMD Geode™ GX1 Processor Silicon Revision 8.1.1 Specification Update document.

The device ID of the SC2200 processor is contained in the GX1 module. Software can detect the revision by reading the DIR0 and DIR1 Configuration registers (see Configuration registers in the AMD Geode™ GX1 Processor Data

Book). The AMD Geode™ SC2200 Processor Specification Update document contains the specific values.

2.1.1 Memory Controller

The GX1 module is connected to external SDRAM devices. For more information see Section 3.4.2 "Memory Interface Signals" on page 54, and the “Memory Controller” chapter in the AMD Geode™ GX1 Processor Data Book.

There are some differences in the memory controller of the SC2200 processor and the standalone GX1 processor’s memory controller:

1) There is drive strength/slew control in the SC2200 that is not in the GX1. The bits that control this function are in the MC_MEM_CNTRL1 and MC_MEM_CNTRL2 registers. In the GX1 processor, these bits are marked as reserved.

2) The SC2200 supports two banks of memory. The GX1 supports four banks of memory. In addition, the SC2200 supports a maximum of eight devices and the GX1 supports up to 32 devices. With this difference, the MC_BANK_CFG register is different.

Table 2-1 summarizes the 32-bit registers contained in the SC2200’s memory controller. Table 2-2 gives detailed register/bit formats.

AMD Geode™ SC2200 Processor Data Book 17

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Table 2-1. SC2200 Memory Controller Register Summary

Architecture Overview

GX_BASE+ Memory Offset

Width

(Bits) Type Name/Function Reset Value

8400h-8403h 32 R/W MC_MEM_CNTRL1. Memory Controller Control Register 1 248C0040h

8404h-8407h 32 R/W MC_MEM_CNTRL2. Memory Controller Control Register 2 00000801h

8408h-840Bh 32 R/W MC_BANK_CFG. Memory Controller Bank Configuration 41104110h

840Ch-840Fh 32 R/W MC_SYNC_TIM1. Memory Controller Synchronous Timing

2A733225h

8414h-8417h 32 R/W MC_GBASE_ADD. Memory Controller Graphics Base

00000000h

Address Register

8418h-841Bh 32 R/W MC_DR_ADD. Memory Controller Dirty RAM Address

00000000h

841Ch-841Fh 32 R/W MC_DR_ACC. Memory Controller Dirty RAM Access

0000000xh

Table 2-2. SC2200 Memory Controller Registers

Bit Description

GX_BASE+ 8400h-8403h MC_MEM_CNTRL1 (R/W) Reset Value: 248C0040h

31:30 MDCTL (MD[63:0] Drive Strength). 11 is strongest, 00 is weakest.

29 RSVD (Reserved) Write as 0.

28:27 MABACTL (MA[12:0] and BA[1:0] Drive Strength). 11 is strongest, 00 is weakest.

26 RSVD (Reserved). Write as 0.

25:24 MEMCTL (RASA#, CASA#, WEA#, CS[1:0]#, CKEA, DQM[7:0] Drive Strength). 11 is strongest, 00 is weakest.

23:22 RSVD (Reserved). Write as 0.

21 RSVD (Reserved). Must be written as 0. Wait state on the X-Bus x_data during read cycles - for debug only.

20:18 SDCLKRATE (SDRAM Clock Ratio). Selects SDRAM clock ratio.

000: Reserved 100: ÷ 3.5 001: ÷ 2 101: ÷ 4 010: ÷ 2.5 110: ÷ 4.5 011: ÷ 3 (Default) 111: ÷ 5

Ratio does not take effect until the SDCLKSTRT bit (bit 17 of this register) transitions from 0 to 1.

17 SDCLKSTRT (Start SDCLK). Start operating SDCLK using the new ratio and shift value (selected in bits [20:18] of this reg-

ister).

0: Clear. 1: Enable.

This bit must transition from zero (written to zero) to one (written to one) in order to start SDCLK or to change the shift value.

16:8 RFSHRATE (Refresh Interval). This field determines the number of processor core clocks multiplied by 64 between refresh

cycles to the DRAM. By default, the refresh interval is 00h. Refresh is turned off by default.

7:6 RFSHSTAG (Refresh Staggering). This field determines number of clocks between the RFSH commands to each of the

four banks during refresh cycles:

00: 0 SDRAM clocks 01: 1 SDRAM clocks (Default) 10: 2 SDRAM clocks 11: 4 SDRAM clocks

Staggering is used to help reduce power spikes during refresh by refreshing one bank at a time. If only one bank is installed, this field must be written as 00.

18 AMD Geode™ SC2200 Processor Data Book

Architecture Overview

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Table 2-2. SC2200 Memory Controller Registers (Continued)

Bit Description

5 2CLKADDR (Two Clock Address Setup). Assert memory address for one extra clock before CS# is asserted.

0: Disable. 1: Enable.

This can be used to compensate for address setup at high frequencies and/or high loads.

4 RFSHTST (Test Refresh). This bit, when set high, generates a refresh request. This bit is only used for testing purposes.

3 XBUSARB (X-Bus Round Robin). When round robin is enabled, processor, graphics pipeline, and low priority display con-

troller requests are arbitrated at the same priority level. When disabled, processor requests are arbitrated at a higher priority level. High priority Display Controller requests always have the highest arbitration priority.

0: Disable. 1: Enable round robin.

2 SMM_MAP (SMM Region Mapping). Maps the SMM memory region at GX_BASE+400000 to physical address A0000 to

BFFFF in SDRAM.

0: Disable. 1: Enable.

1 RSVD (Reserved). Write as 0.

0 SDRAMPRG (Program SDRAM). When this bit is set, the memory controller will program the SDRAM MRS register using

LTMODE in MC_SYNC_TIM1.

This bit must transition from zero (written to zero) to one (written to one) in order to program the SDRAM devices.

GX_BASE+8404h-8407h MC_MEM_CNTRL2 (R/W) Reset Value: 00000801h

31:14 RSVD (Reserved). Write as 0.

13:12 SDCLKCTL (SDCLK High Drive/Slew Control). Controls the high drive and slew rate of SDCLK[3:0] and SDCLK_OUT.

11 is strongest, 00 is weakest.

11 RSVD (Reserved). Write as 0.

10 SDCLKOMSK# (Enable SDCLK_OUT). Turns on the output.

0: Enable. 1: Disable.

9 SDCLK3MSK# (Enable SDCLK3). Turns on the output.

0: Enable. 1: Disable.

8 SDCLK2MSK# (Enable SDCLK2). Turns on the output.

0: Enable. 1: Disable.

7 SDCLK1MSK# (Enable SDCLK1). Turns on the output.

0: Enable. 1: Disable.

6 SDCLK0MSK# (Enable SDCLK0). Turns on the output.

0: Enable. 1: Disable.

5:3 SHFTSDCLK (Shift SDCLK). This function allows shifting SDCLK to meet SDRAM setup and hold time requirements. The

shift function will not take effect until the SDCLKSTRT bit (bit 17 of MC_MEM_CNTRL1) transitions from 0 to 1:

000: No shift 100: Shift 2 core clocks 001: Shift 0.5 core clock 101: Shift 2.5 core clocks 010: Shift 1 core clock 110: Shift 3 core clocks 011: Shift 1.5 core clock 111: Reserved

2 RSVD (Reserved). Write as 0.

1 RD (Read Data Phase). Selects if read data is latched one or two core clock after the rising edge of SDCLK.

0: 1 Core clock. 1: 2 Core clocks.

0 FSTRDMSK (Fast Read Mask). Do not allow core reads to bypass the request FIFO.

0: Disable. 1: Enable.

AMD Geode™ SC2200 Processor Data Book 19

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Architecture Overview

Table 2-2. SC2200 Memory Controller Registers (Continued)

Bit Description

GX_BASE+8408h-840Bh MC_BANK_CFG (R/W) Reset Value: 41104110h

31:16 RSVD (Reserved). Write as 0070h

15 RSVD (Reserved). Write as 0.

14 SODIMM_MOD_BNK (SODIMM Module Banks - Banks 0 and 1). Selects number of module banks installed per SODIMM

for SODIMM:

0: 1 Module bank (Bank 0 only). 1: 2 Module banks (Bank 0 and 1).

13 RSVD (Reserved). Write as 0.

12 SODIMM_COMP_BNK (SODIMM Component Banks - Banks 0 and 1). Selects the number of component banks per

module bank for SODIMM:

0: 2 Component banks. 1: 4 Component banks.

Banks 0 and 1 must have the same number of component banks.

11 RSVD (Reserved). Write as 0.

10:8 SODIMM_SZ (SODIMM Size - Banks 0 and 1). Selects the size of SODIMM:

000: 4 MB 010: 16 MB 100: 64 MB 110: 256 MB 001: 8 MB 011: 32 MB 101: 128 MB 111: 512 MB

This size is the total of both banks 0 and 1. Also, banks 0 and 1 must be the same size.

7 RSVD (Reserved). Write as 0.

6:4 SODIMM_PG_SZ (SODIMM Page Size - Banks 0 and 1). Selects the page size of SODIMM:

000: 1 KB 010: 4 KB 1xx: 16 KB 001: 2 KB 011: 8 KB 111: SODIMM not installed

Both banks 0 and 1 must have the same page size.

3:0 RSVD (Reserved). Write as 0.

GX_BASE+840Ch-840Fh MC_SYNC_TIM1 (R/W) Reset Value: 2A733225h

31 RSVD (Reserved). Write as 0.

30:28 LTMODE (CAS Latency). CAS latency is the delay, in SDRAM clock cycles, between the registration of a read command

27:24 RC (RFSH to RFSH/ACT Command Period, tRC). Minimum number of SDRAM clock between RFSH and RFSH/ACT

23:20 RAS (ACT to PRE Command Period, tRAS). Minimum number of SDRAM clocks between ACT and PRE commands:

18:16 RP (PRE to ACT Command Period, tRP). Minimum number of SDRAM clocks between PRE and ACT commands:

14:12 RCD (Delay Time ACT to READ/WRT Command, tRCD). Minimum number of SDRAM clock between ACT and READ/

and the availability of the first piece of output data. This parameter significantly affects system performance. Optimal setting should be used. If an SODIMM is used, BIOS can interrogate EEPROM across the ACCESS.bus interface to determine this value:

000: Reserved 010: 2 CLK 100: 4 CLK 110: 6 CLK 001: Reserved 011: 3 CLK 101: 5 CLK 111: 7 CLK

This field will not take effect until SDRAMPRG (bit 0 of MC_MEM_CNTRL1) transitions from 0 to 1.

commands:

0000: Reserved 0100: 5 CLK 1000: 9 CLK 1100: 13 CLK 0001: 2 CLK 0101: 6 CLK 1001: 10 CLK 1101: 14 CLK 0010: 3 CLK 0110: 7 CLK 1010: 11 CLK 1110: 15 CLK 0011: 4 CLK 0111: 8 CLK 1011: 12 CLK 1111: 16 CLK

19 RSVD (Reserved). Write as 0.

000: Reserved 010: 2 CLK 100: 4 CLK 110: 6 CLK 001: 1 CLK 011: 3 CLK 101: 5 CLK 111: 7 CLK

15 RSVD (Reserved). Write as 0.

WRT commands. This parameter significantly affects system performance. Optimal setting should be used:

000: Reserved 010: 2 CLK 100: 4 CLK 110: 6 CLK 001: 1 CLK 011: 3 CLK 101: 5 CLK 111: 7 CLK

20 AMD Geode™ SC2200 Processor Data Book

Architecture Overview

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Table 2-2. SC2200 Memory Controller Registers (Continued)

Bit Description

11 RSVD (Reserved). Write as 0.

10:8 RRD (ACT(0) to ACT(1) Command Period, tRRD). Minimum number of SDRAM clocks between ACT and ACT command

to two different component banks within the same module bank. The memory controller does not perform back-to-back Activate commands to two different component banks without a READ or WRITE command between them. Hence, this field should be written as 001.

7 RSVD (Reserved). Write as 0.

6:4 DPL (Data-in to PRE command period, tDPL). Minimum number of SDRAM clocks from the time the last write datum is

3:0 RSVD (Reserved). Leave unchanged. Always returns a 101h.

Note: Refer to the SDRAM manufacturer’s specification for more information on component banks.

GX_BASE+8414h-8417h MC_GBASE_ADD (R/W) Reset Value: 00000000h

31:18 RSVD (Reserved). Write as 0.

15:12 SEL (Select). This field is used for debug purposes only and should be left at zero for normal operation.

10:0 GBADD (Graphics Base Address). This field indicates the graphics memory base address, which is programmable on 512

GX_BASE+8418h-841Bh MC_DR_ADD (R/W) Reset Value: 00000000h

31:10 RSVD (Reserved). Write as 0.

9:0 DRADD (Dirty RAM Address). This field is the address index that is used to access the Dirty RAM with the MC_DR_ACC

GX_BASE+841Ch-841Fh MC_DR_ACC (R/W) Reset Value: 0000000xh

31:2 RSVD (Reserved). Write as 0.

sampled till the bank is precharged:

000: Reserved 010: 2 CLK 100: 4 CLK 110: 6 CLK 001: 1 CLK 011: 3 CLK 101: 5 CLK 111: 7 CLK

17 TE (Test Enable TEST[3:0]).

0: TEST[3:0] are driven low (normal operation). 1: TEST[3:0] pins are used to output test information.

16 TECTL (Test Enable Shared Control Pins).

0: RASB#, CASB#, CKEB, WEB# (normal operation). 1: RASB#, CASB#, CKEB, WEB# are used to output test information.

11 RSVD (Reserved). Write as 0.

KB boundaries. This field corresponds to address bits [29:19].

Note that BC_DRAM_TOP must be set to a value lower than the Graphics Base Address.

1 D (Dirty Bit). This bit is read/write accessible.

0 V (Valid Bit). This bit is read/write accessible.

AMD Geode™ SC2200 Processor Data Book 21

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Architecture Overview

2.1.2 Fast-PCI Bus

The GX1 module communicates with the Core Logic module via a Fast-PCI bus that can work at up to 66 MHz. The Fast-PCI bus is internal for the SC2200 and is connected to the General Configuration Block (see Section 4.0 on page 75 for details on the General Configuration Block).

This bus supports seven bus masters. The requests (REQs) are fixed in priority. The seven bus masters in order of priority are:

1) VIP

2) IDE Channel 0

3) IDE Channel 1

4) Audio

5) USB

6) External REQ0#

7) External REQ1#

2.1.3 Display

The GX1 module generates display timing, and controls internal signals CRT_VSYNC and CRT_HSYNC of the Video Processor module.

The GX1 module interfaces with the Video Processor via a video data bus and a graphics data bus.

• Video data. The GX1 module uses the core clock, divided by 2 or 4 (typically 100 - 133 MHz). It drives the video data using this clock. Internal signals VID_VAL and VID_RDY are used as data-flow handshake signals between the GX1 module and the Video Processor.

• Graphics data. The GX1 module uses the internal signal DCLK, supplied by the PLL of the Video Processor, to drive the 18-bit graphics-data bus of the Video Processor. Each six bits of this bus define a different color. Each of these 6-bit color definitions is expanded (by adding two zero LSB lines) to form an 8-bit bus, at the Video Processor.

For more information about the GX1 module’s interface to the Video Processor, see the “Display Controller” chapter in the AMD Geode™ GX1 Processor Data Book.

2.2 Video Processor Module

The Video Processor provides high resolution and graphics for a CRT or TFT/DSTN interface. The following subsections provide a summary of how the Video Processor interfaces with the other modules of the SC2200. For detailed information about the Video Processor, see Section 7.0 "Video Processor Module" on page 319.

2.2.1 GX1 Module Interface

The Video Processor is connected to the GX1 module in the following way:

• The Video Processor’s DOTCLK output signal is used as the GX1 module’s DCLK input signal.

• The GX1 module’s PCLK output signal is used as the GFXCLK input signal of the Video Processor.

2.2.2 Video Input Port

The Video Input Port (VIP) within the Video Processor contains a standard interface that is typically connected to a media processor or TV encoder. The clock is supplied by the externally connected device; typically at 27 MHz.

Video input can be sent to the GX1 module’s video frame buffer (Capture Video mode) or can be used directly (Direct Video mode).

2.2.3 Core Logic Module Interface

The Video Processor interfaces to the Core Logic module for accessing PCI function configuration registers.

2.2.4 CRT DAC

The Video Processor drives three CRT DACs with up to 135M pixels per second.

The interface for these DACs can be monitored via external balls of the SC2200. For more information, see Section

3.4.4 "CRT/TFT Interface Signals" on page 56.

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Architecture Overview

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2.3 Core Logic Module

The Core Logic module is described in detail in Section 6.0 "Core Logic Module" on page 149.

The Core Logic module is connected to the Fast-PCI bus. It uses signal AD28 as the IDSEL for all PCI configuration functions except for USB which uses AD29.

2.3.1 Other Interfaces of the Core Logic Module

The following interfaces of the Core Logic module are implemented via external balls of the SC2200. Each interface is listed below with a reference to the descriptions of the relevant balls.

• IDE: See Section 3.4.9 "IDE Interface Signals" on page

63.

• AC97: See Section 3.4.14 "AC97 Audio Interface

Signals" on page 68.

• PCI: See Section 3.4.6 "PCI Bus Interface Signals" on

page 57.

• USB: See Section 3.4.10 "Universal Serial Bus (USB)

Interface Signals" on page 64. The USB function uses signal AD29 as the IDSEL for PCI configuration.

• LPC: See Section 3.4.8 "Low Pin Count (LPC) Bus Inter-

face Signals" on page 62.

• Sub-ISA: See Section 3.4.7 "Sub-ISA Interface Signals"

on page 61, Section 6.2.5 "Sub-ISA Bus Interface" on page 155, and Section 4.2 "Multiplexing, Interrupt Selection, and Base Address Registers" on page 76

• GPIO: See Section 3.4.16 "GPIO Interface Signals" on

page 70.

• More detailed information about each of these interfaces

is provided in Section 6.2 "Module Architecture" on page

150.

• Super/IO Block Interfaces: See Section 4.2 "Multi-

plexing, Interrupt Selection, and Base Address Registers" on page 76, Section 3.4.5 "ACCESS.bus Interface Signals" on page 57, Section 3.4.13 "Fast Infrared (IR) Port Interface Signals" on page 67, and Section 3.4.12 "Parallel Port Interface Signals" on page 66.

The Core Logic module interface to the GX1 module consists of seven miscellaneous connections, the PCI bus interface signals, plus the display controller connections. Note that the PC/AT legacy signals NMI, WM_RST, and A20M are all virtual functions executed in SMM (System Management Mode) by the BIOS.

• PSERIAL is a one-way serial bus from the GX1 to the Core Logic module used to communicate powermanagement states and VSYNC information for VGA emulation.

• IRQ13 is an input from the GX1 module indicating that a floating point error was detected and that INTR should be asserted.

• INTR is the level output from the integrated 8259A PICs and is asserted if an unmasked interrupt request (IRQn) is sampled active.

• SMI# is a level-sensitive interrupt to the GX1 module that can be configured to assert on a number of different system events. After an SMI# assertion, SMM is entered and program execution begins at the base of the SMM address space. Once asserted, SMI# remains active until the SMI source is cleared.

• SUSP# and SUSPA# are handshake signals for implementing CPU Clock Stop and clock throttling.

• CPU_RST resets the CPU and is asserted for approximately 100 µs after the negation of POR#.

• PCI bus interface signals.

2.4 SuperI/O Module

The SuperI/O (SIO) module is PC98 and ACPI compliant. It offers a single-cell solution to the most commonly used ISA peripherals.

The SIO module incorporates: two Serial Ports, an Infrared Communication Port that supports FIR, MIR, HP-SIR, Sharp-IR, and Consumer Electronics-IR, a full IEEE 1284 Parallel Port, two ACCESS.bus Interface (ACB) ports, System Wakeup Control (SWC), and a Real-Time Clock (RTC) that provides RTC timekeeping.

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Architecture Overview

2.5 Clock, Timers, and Reset Logic

In addition to the four main modules (i.e., GX1, Core Logic, Video Processor and SIO) that make up the SC2200, the following blocks of logic have also been integrated into the SC2200:

• Clock Generators as described in Section 4.5 "Clock Generators and PLLs" on page 87.

• Configuration Registers as described in Section 4.2 "Multiplexing, Interrupt Selection, and Base Address Registers" on page 76.

• A WATCHDOG timer as described in Section 4.3 "WATCHDOG" on page 83.

• A High-Resolution timer as described in Section 4.4 "High-Resolution Timer" on page 85.

2.5.1 Reset Logic

This section provides a description of the reset flow of the SC2200.

2.5.1.1 Power-On Reset

Power-on reset is triggered by assertion of the POR# signal. Upon power-on reset, the following things happen:

• Strap balls are sampled.

• PLL4, PLL5, and PLL6 are reset, disabling their output.

When the POR# signal is negated, the clocks lock and then each PLL outputs its clock. PLL6 is the last clock generator to output a clock. See Section 4.5 "Clock Generators and PLLs" on page 87.

• Certain WATCHDOG and High-Resolution Timer register bits are cleared.

2.5.1.2 System Reset

System reset causes signal PCIRST# to be issued, thus triggering a reset of all PCI and LPC agents. A system reset is triggered by any of the following events:

• Power-on, as indicated by POR# signal assertion.

• A WATCHDOG reset event (see Section 4.3.2

"WATCHDOG Registers" on page 84).

• Software initiated system reset.

24 AMD Geode™ SC2200 Processor Data Book

Signal Definitions 32580B

3.0Signal Definitions

This section defines the signals and describes the external interface of the SC2200 processor. Figure 2-1 shows the signals organized by their functional groups. Where signals are multiplexed, the default signal name is listed first and is

POR# X32I X32O X27I

System

Interface

Memory

Interface

ACCESS.bus

Interface

Parallel Port/

TFT Interface

X27O PCIRST# BOOT16+ROMCS# LPC_ROM+PCICLK1 TFT_PRSNT+SDATA_OUT FPCI_MON+PCICLK0 DID0+GNT0#, DID1+GNT1#

MD[63:0] MA[12:0] BA[1:0] CS[1:0]# RASA# CASA# WEA# DQM[7:0] CKEA SDCLK[3:0] SDCLK_IN SDCLK_OUT

AB1C+GPIO20+DOCCS# AB1D+GPIO1+IOCS1# GPIO12+AB2C GPIO13+AB2D

ACK#+TFTDE AFD#/DSTRB#+TFTD2 BUSY/WAIT#+TFTD3 ERR#+TFTD4 INIT#+TFTD5 PD7+TFTD13 PD6+TFTD1 PD[5:0]+TFTD[11:6] PE+TFTD14 SLCT+TFTD15 SLIN#/ASTRB#+TFTD16 STB#/WRITE#+TFTD17

AMD Geode™ SC2200 Processor

separated by a plus sign (+). A slash (/) in a signal name means that the function is always enabled and available (i.e., cycle multiplexed).

HSYNC

RED, GREEN, BLUE

Straps

IDE_ADDR2+TFTD4 IDE_ADDR1+TFTD2 IDE_ADDR0+TFTD3

IDE_DATA15+TFTD7

IDE_DATA14+TFTD17 IDE_DATA13+TFTD15 IDE_DATA12+TFTD13 IDE_DATA11+GPIO41

IDE_DATA10+DDC_SCL

IDE_DATA9+DDC_SDA

IDE_DATA8+GPIO40

IDE_DATA7+INTD#

IDE_DATA6+IRQ9

IDE_DATA5+CLK27M

IDE_DATA4+FP_VDD_ON

IDE_DATA3+TFTD12 IDE_DATA2+TFTD14 IDE_DATA1+TFTD16

IDE_DATA0+TFTD6

IDE_IOR0#+TFTD10

IDE_IOW0#+TFTD9

IDE_CS0#+TFTD5

IDE_CS1#+TFTDE

IDE_IORDY0+TFTD11

IDE_DREQ0+TFTD8

IDE_DACK0#+TFTD0

IDE_RST#+TFTDCK

VSYNC

VREF

SETRES

IRQ14+TFTD1

CRT Interface

IDE/TFT Interface

Video Port

Interface

VPD[7:0] VPCKIN

Note: Straps are not the default signal, shown with system signals for reader convenience. However, they are also listed with the

appropriate functional group.

Figure 3-1. Signal Groups

AMD Geode™ SC2200 Processor Data Book 25

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Signal Definitions

USB

Interface

Serial Ports

(UARTs)/IDE

Interface

IR Port

Interface

AC97 Audio

Interface

Power

Management

Interface

JTAG

Interface

POWER_EN OVER _CUR# DPOS_PORT1 DNEG_PORT1 DPOS_PORT2 DNEG_PORT2 DPOS_PORT3 DNEG_PORT3

SIN1 SIN2+SDTEST3 SOUT1+CLKSEL1 SOUT2+CLKSEL2 GPIO7+RTS2#+IDE_DACK1#+SDTEST0 GPIO8+CTS2#+IDE_DREQ1+SDTEST4 GPIO18+DTR1#/BOUT1 GPIO6+DTR2#/BOUT2+IDE_IOR1#+SDTEST5 GPIO11+RI2#+IRQ15 GPIO9+DCD2#+IDE_IOW1#+SDTEST2 GPIO10+DSR2#+IDE_IORDY1+SDTEST1

IRRX1+SIN3 IRTX+SOUT3

BIT_CLK SDATA_OUT+TFT_PRSNT SDATA_IN SDATA_IN2 SYNC+CLKSEL3 AC97_CLK AC97_RST# GPIO16+PC_BEEP

CLK32 GPWIO[2:0] LED# ONCTL# PWRBTN# PWRCNT[1:2] THRM#

TCK TDI TDO TMS TRST#

AMD Geode™ SC2200 Processor

GPIO17+TFTDCK+IOCS0#

GPIO20+DOCCS#+TFTD0

GPIO15+DOCW#+IOW#

GPIO19+INTC#+IOCHRDY

GPIO38+IRRX2+LPCPD

TEST3+GXCLK+FP_VDD_ON

PCICLK0+FPCI_MON

PCICLK1+LPC_ROM

PCICLK

INTA#, INTB#

FRAME#

LOCK# PERR# SERR#

REQ[1:0]# GNT0#+DID0 GNT1#+DID1

A[23:0]/AD[23:0] D[7:0]/AD[31:24]

D[11:8]/C/BE[3:0]#

D12/PAR

D13/TRDY#

D14/IRDY#

D15/STOP#

BHE#/DEVSEL#

GPIO1+IOCS1+TFTD12

ROMCS#/BOOT16

RD#+CLKSEL0

WR#

GPIO14+DOCR#+IOR#

GPIO0+TRDE#

GPIO32+LAD0 GPIO33+LAD1 GPIO34+LAD2 GPIO35+LAD3

GPIO36+LDRQ#

GPIO37+LFRAME#

GPIO39+SERIRQ

TEST1+PLL6B TEST0+PLL2B

TEST2+PLL5B

GTEST

TDP, TDN

Sub-ISA/PCI Bus Interface

GPIO/LPC Bus Interface

Test and Measurement Interface

Figure 3-1. Signal Groups (Continued)

The remaining subsections of this chapter describe:

• Section 3.1 "Ball Assignments": Provides a ball assignment diagram and tables listing the signals sorted according to ball number and alphabetically by signal name.

• Section 3.2 "Strap Options": Several balls are read at power-up that set up the state of the SC2200. This section provides details regarding those balls.

26 AMD Geode™ SC2200 Processor Data Book

• Section 3.3 "Multiplexing Configuration": Lists multi-

plexing options and their configurations.

• Section 3.4 "Signal Descriptions": Detailed descriptions of each signal according to functional group.

Signal Definitions

3.1 Ball Assignments

The SC2200 is highly configurable as illustrated in Figure 3-1 on page 25. Strap options and register programming are used to set various modes of operation and specific signals on specific balls. This section describes which signals are available on which balls and provides configuration information:

• Figure 3-2 on page 28: Illustrates the BGU481 ball assignments.

• Table 3-2 on page 29: Lists signals according to ball number. Power Rail, Signal Type, Buffer Type and, where relevant, Pull-Up or Pull-Down resistors are indicated for each ball in this table. For multiplexed balls, the necessary configuration for each signal is listed as well.

• Table 3-3 on page 41: Quick reference signal list sorted alphabetically - listing all signal names and ball numbers.The tables in this chapter use several common abbreviations. Table 3-1 lists the mnemonics and their meanings

Notes:

1) For each GPIO signal, there is an optional pull-up

resistor on the relevant ball. After system reset, the pull-up is present.

This pull-up resistor can be disabled via registers in the Core Logic module. The configuration is without regard to the selected ball function (except for GPIO12, GPIO13, and GPIO16). Alternate functions for GPIO12, GPIO13, and GPIO16 control pull-up resistors.

For more information, see Section 6.4.1 "Bridge, GPIO, and LPC Registers - Function 0" on page 198.

2) Configuration settings listed in this table are with

regard to the Pin Multiplexing Register (PMR). See Section 4.2 "Multiplexing, Interrupt Selection, and Base Address Registers" on page 76 for a detailed description of this register.

32580B

Table 3-1. Signal Definitions Legend

Mnemonic Definition

A Analog

GCB General Configuration Block registers.

I Input ball

I/O Bidirectional ball

MCR[x] Miscellaneous Configuration Register

O Output ball

OD Open-drain PD Pull-down in KΩ

PMR[x] Pin Multiplexing Register Bit x: A regis-

PU Pull-up in KΩ

TS TRI-STATE

CORE

# The # symbol in a signal name indicates

/ A / in a signal name indicates both func-

+ A + in signal name indicates the function

Ground ball: Analog

Power ball: Analog

Refer to Section 4.0 "General Configuration Block" on page 75.

Location of the General Configuration Block cannot be determined by software. See the AMD Geode™ SC2200 Proces-

sor Specification Update.

Bit x: A register, located in the GCB. Refer to Section 4.1 "Configuration Block Addresses" on page 75 for further details.

ter, located in the GCB, used to configure balls with multiple functions. Refer to Section 4.1 "Configuration Block Addresses" on page 75 for further details.

Power ball: 1.2V

Power ball: 3.3V

Ground ball

that the active or asserted state occurs when the signal is at a low voltage level. Otherwise, the signal is asserted when at a high voltage level.

tions are always enabled (i.e., cycle multiplexed).

is available on the ball, but that either strapping options or register programming is required to select the desired function.

AMD Geode™ SC2200 Processor Data Book 27

32580B

Signal Definitions

12345678910111213141516171819202122232425262728293031

SSVIOVSS

SSS

FRM# IOR# GP1 TRDE# V

GREEN BLUE VSSV

CCCTVSS

STRES VIOBUSY ACK# VIOSLIN# INIT# VSSNC VSSVSSNC D+P2 D-P2 GP10 VSSV

SSCT

SSCTAVCCCTAVSSCTAVSSCTAVSSP2

CCCTVSSVIOAVCCCT

VREF PE VIOVSSPD2 ERR# AFD# VIONC VSSINTA# AV

PD7 VSSPD6 PD1 STB# NC NC N C D+P3 D-P3 D+P1 D-P1 VIOV

PLL2

SLCT PD4 PD5 PD3 PD0 VIONC NC VIOINTB# AV

SSUSB

CCUSB

AMD Geode™

AD14 GP38 VIOVSSGP37

IOVSS

SC2200 Processor

CORE

IDAT3

SSVIO

SSVIOVSS

PBTN# GPW0 VSSCK32 POR# MD3 MD5 WEA# VSSVIOMA1 MD34 MD37 VIOVSSMD41 MA9 MA8 DQM1 MD13 VSSMA11 CS1# MD18 MD48 MD20 MD51

ONCT# GPW2 VIOGP11 MD0 VIOMD6 CASA# BA0 MA10 MD32 MD33 MD36 MD47 MD45 MD42 SDCK0 VIOMA6 MA3 VIOMD11 SDCKI MD19 VIOMD22 MD17

PLL3

THRM#GPW1 PCNT1 VSSIRRX1 MD1 VSSMD7 RASA# VIOBA1 MA2 VIOMD35 MD46 VIOMD43 DQM5 VSSMA5 MD15 VSSMD14 MD12 SDCKO MD16 VSSV

LED# VSBV

BAT

PCNT2 SDATI2 MD2 MD4 DQM0 CS0# VSSMA0 DQM4 VSSMD38 MD39 VSSMD44 MD40 CKEA MA7 MA4 MD8 MD10 MD9 MA12 MD23 VIOV

SBL

COREVCOREVSSVSSVSSVCOREVCORE

VSSVSSVSSVSSVSSVSSV

COREVCOREVSSVSSVSSVCOREVCORE

(Top View)

GP9 VIOGP7 GP8

GP6 SOUT TDP TDN

TMS TDI GTST VPCKI

VSSVIOVSSVPD7

VPD6 VPD5 VPD4 VPD3

VPD2 VPD1 VPD0 GP39

GP36 GP35 GP34 GP33

GP32 GP13 V

VSSGP12 AB1D AB1C

CORE

SSVSSVSSVSS

COREVCOREVCOREVCORE

CORE

MD57 SDCK1 V

MD58 MD59 MD60 MD56

SDCK2 MD61 MD62 MD63

MD24 V

MD25 MD26 MD27 DQM3

MD52 MD29 MD30 MD31

SSVIOVSS

MD50 MD49 MD54 MD53

MD21 DQM6 DQM2 MD55

VSSVIOAD30 PCK0 REQ1# PRST# PCICK IOW# GP20 GP17 HSNC AV

VSSVIOAD29 AD28 REQ0# AD23 VSSRD# WR# VSSVSNC RED VIOAV

AD26 AD24 VIOAD25 GNT0# GNT1# VIORMCS# GP19 VIOIRTX V

AD21 AD22 AD20 AD27 AD31 PCK1 V

AD16 AD19 AD18 DVSL# SIN2 TRST# TDO TCK

TRDY# IRDY# CBE2# AD17

STOP# V

SRR# PRR# LOCK# CBE3#

AD13 CBE1# AD15 PAR

AD11 V

CBE0# AD9 AD10 A D12

AD7 VIOAD8

AD3 AD6 AD5 V

AD4 ICS1# AD1 V

SSVSSVSSVSS

COREVCOREVCOREVCORE

AD0 IAD2 AD2 V

IDAT15 IDAT14 IDAT13 V

VIOVSSIDAT12 IDAT11

IDAT10 IDAT9 IDAT8 IIOR0#

IRST# IDAT7 IDAT6 IDAT5

IDAT4 V

IDAT1 IDAT2 IDAT0 IDRQ0

IIORY0 IIOW0# IAD0 IDACK0#

IAD1 V

IRQ14 ICS0# SOUT1 OVRCUR#

GP18 SIN1 X27I TEST1

PWRE X27O TEST0 V

TEST2 X32I X32O V

IOVSSAVSSP3

VSSVIOV

12345678910111213141516171819202122232425262728293031

Note: Signal names have been abbreviated in this figure due to space constraints.

= GND Ball = PWR Ball

= Strap Option Ball = Multiplexed Ball

IOVSS

SDO SYNC ACCK

ACRST# BITCK SDI

SDCK3 GXCK GP16

SSVIO

DQM7

IOVSS

MD28

Figure 3-2. BGU481 Ball Assignment Diagram

28 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

Table 3-2. BGU481 Ball Assignment - Sorted by Ball Number

STRP

, O

14/14

PCI

3/5

, O

3/5

1/4

, O

3/5

1/4

Power

3/5

3/5VIO

Ball No. Signal Name

A1 V

A2 V

I/O

Buffer

(PU/PD)

Typ e

GND --- --- ---

PWR --- --- ---

A3 AD30 I/O IN

D6 I/O IN

A4 PCICLK0 O O

FPCI_MON I

(PD

A5 REQ1# I

(PU

100

22.5

)

A6 PCIRST# O O

A7 PCICLK I IN

A8 IOW# O O

DOCW# O O

GPIO15 I/O

A9 GPIO20 I/O

(PU

22.5

)

DOCCS# O

(PU

)

22.5

TFTD0 O

A10 GPIO17 I/O

IOCS0# O

(PU

22.5

)

TFTDCK O

(PU

)

22.5

A11 HSYNC O O

A12 AV

A13 V

CCCRT

PWR --- --- ---

GND --- --- ---

A14 GREEN O WIRE AV

A15 BLUE O WIRE AV

A16 V

A17 V

A18

PLL2

6, 2

PD7 I/O INT,

GND --- --- ---

PWR --- --- ---

TFTD13 O O

F_AD7 O O

A19 V

GND --- --- ---

Rail Configuration

VIOCycle Multiplexed

VIO---

Strap (See Table 3-4 on page 45.)

VIO---

VIOPMR[21] = 0 and

PMR[2] = 0

PMR[21] = 0 and PMR[2] = 1

PMR[21] = 1 and PMR[2] = 1

PMR[23]3 = 0 and PMR[7] = 0

PMR[23]3 = 0 and PMR[7] = 1

PMR[23]3 = 1

PMR[23]3 = 0 and PMR[5] = 0

PMR[23]3 = 0 and PMR[5] = 1

PMR[23]3 = 1

VIO---

---

C-

CCRT

---

C-

CCRT

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

32580B

14/14

1/4

14/14

1/4

14/14

1/4

14/14

USB

PCI

Power

Rail Configuration

C-

CUSB

C-

CUSB

C-

CUSB

C-

CUSB

VIOCycle Multiplexed

VIO---

Ball No. Signal Name

6, 2

PD6 I/O INT,

A20

I/O

(PU/PD)

Buffer

Typ e

TFTD1 O O

F_AD6 O O

6, 2

PD1 I/O INT,

A21

TFTD7 O O

F_AD1 O O

6, 2

STB#/WRITE# O O

A22

TFTD17 O

F_FRAME# O O

A23 NC --- --- --- ---

A24 NC --- --- --- ---

A25 NC --- --- --- ---

DPOS_PORT3 I/O IN

A26

DNEG_PORT3 I/O IN

A27

DPOS_PORT1 I/O IN

A28

DNEG_PORT1 I/O IN

A29

A30 V

A31 V

B1 V

B2 V

PWR --- --- ---

GND --- --- ---

PWR --- --- ---

B3 AD29 I/O IN

D5 I/O IN

B4 AD28 I/O IN

D4 I/O IN

B5 REQ0# I

(PU

22.5

)

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

---

AMD Geode™ SC2200 Processor Data Book 29

32580B

Table 3-2. BGU481 Ball Assignment - Sorted by Ball Number (Continued)

STRP

14/14

Power

Rail Configuration

VIOCycle Multiplexed

PCI

VIO---

3/5

1/4

VIO---

C-

CCRT

C-

CCRT

Ball No. Signal Name

I/O

(PU/PD)

Buffer

Typ e

B6 AD23 I/O IN

A23 O O

B7 V

GND --- --- ---

B8 RD# O O

CLKSEL0 I

(PD

100

)

B9 WR# O O

B10 V

GND --- --- ---

B11 VSYNC O O

B12 RED O WIRE AV

B13 V

B14 AV

SSCRT

PWR --- --- ---

GND --- --- ---

B15 SETRES I WIRE AV

B16 V

B17

6, 2

BUSY/WAIT# I IN

PWR --- --- ---

TFTD3 O O

F_C/BE1# O O

6, 2

ACK# I IN

B18

TFTDE O O

FPCICLK O O

B19 V

B20

6,2

SLIN#/ASTRB# O O

PWR --- --- ---

TFTD16 O O

F_IRDY# O O

6,2

INIT# O O

B21

TFTD5 O O

SMI_O O O

B22 V

GND --- --- ---

B23 NC --- --- --- ---

B24 V

GND --- --- ---

Strap (See Table 3-4 on page 45.)

---

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

Signal Definitions

USB

STRP

Power

Rail Configuration

C-

CUSB

C-

CUSB

, O

8/8VIO

TS1

2/5

VIOCycle Multiplexed

PCI

VIOCycle Multiplexed

PCI

VIOCycle Multiplexed

PCI

VIO---

PCI

VIO---

PCI

VIO---

3/5

VIOStrap (See Table

, O

3/5VIO

TS1

VIOPMR[6] = 0

8/8

Ball No. Signal Name

B25 V

I/O

Buffer

(PU/PD)

Typ e

GND --- --- ---

B26 NC --- --- --- ---

DPOS_PORT2 I/O IN

B27

DNEG_PORT2 I/O IN

B28

B29 GPIO10 I/O

(PU

DSR2# I

IDE_IORDY1 I

SDTEST1 O

B30 V

B31 V

(PU

GND --- --- ---

PWR --- --- ---

22.5

)

C1 AD26 I/O IN

D2 I/O IN

C2 AD24 I/O IN

D0 I/O IN

C3 V

PWR --- --- ---

C4 AD25 I/O IN

D1 I/O IN

C5 GNT0# O O

DID0 I

(PD

100

)

C6 GNT1# O O

DID1 I

C7 V

(PD

)

100

PWR --- --- ---

C8 ROMCS# O O

BOOT16 I

(PD

C9 GPIO19 I/O

INTC# I

IOCHRDY I

C10 V

(PU

)

100

)

22.5

)

22.5

)

22.5

PWR --- --- ---

C11 IRTX O O

SOUT3 O O

C12 V

C13 AV

C14 AV

C15 AV

SSCRT

CCCRT

SSCRT

GND --- --- ---

PWR --- --- ---

GND --- --- ---

---

PMR[18] = 0 and PMR[8] = 0

PMR[18] = 1 and PMR[8] = 0

PMR[18] = 0 and PMR[8] = 1

PMR[18] = 1 and PMR[8] = 1

Strap (See Table 3-4 on page 45.)

3-4 on page 45.)

PMR[9] = 0 and PMR[4] = 0

PMR[9] = 0 and PMR[4] = 1

PMR[9] = 1 and PMR[4] = 1

PMR[6] = 1

30 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

Table 3-2. BGU481 Ball Assignment - Sorted by Ball Number (Continued)

14/14

, O

Power

Rail Configuration

1/4

VIO---

PCI

1/4VIO

1/4

2/5

Ball No. Signal Name

C16 AV

C17

SSPLL2

6,2

SLCT I IN

I/O

Buffer

(PU/PD)

Typ e

GND --- --- ---

TFTD15 O O

F_C/BE3# O O

C18 PD4 I/O IN

TFTD10 O O

F_AD4 O O

6,2

PD5 I/O INT,

C19

TFTD11 O O

F_AD5 O O

6,2

PD3 I/O INT,

C20

TFTD9 O O

F_AD3 O O

6,2

PD0 I/O INT,

C21

TFTD6 O O

F_AD0 O O

C22 V

PWR --- --- ---

C23 NC --- --- --- ---

C24 NC --- --- --- ---

C25 V

C26 INTB# I

C27 AV

SSUSB

C28 GPIO9 I/O

DCD2# I

IDE_IOW1# O

PWR --- --- ---

)

(PU

22.5

GND --- --- ---

)

(PU

22.5

)

(PU

22.5

)

(PU

22.5

SDTEST2 O

)

(PU

22.5

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

PMR[18] = 0 and PMR[8] = 0

PMR[18] = 1 and PMR[8] = 0

PMR[18] = 0 and PMR[8] = 1

PMR[18] = 1 and PMR[8] = 1

32580B

Ball No. Signal Name

C29 V

C30 GPIO7 I/O

RTS2# O

IDE_DACK1# O

SDTEST0 O

C31 GPIO8 I/O

CTS2# I

IDE_DREQ1 I

SDTEST4 O

D1 AD21 I/O IN

A21 O O

D2 AD22 I/O IN

A22 O O

D3 AD20 I/O IN

A20 O O

D4 AD27 I/O IN

D3 I/O IN

D5 AD31 I/O IN

D7 I/O IN

D6 PCICLK1 O O

LPC_ROM I

D7 V

D8 FRAME# I/O

D9 IOR# O O

DOCR# O O

GPIO14 I/O

D10 GPIO1 I/O

IOCS1# O

TFTD12 O

D11 TRDE# O O

GPIO0 I/O

D12 V

CCCRT

I/O

(PU/PD)

Buffer

PWR --- --- ---

)

(PU

22.5

(PU

)

22.5

(PU

)

22.5

)

(PU

22.5

)

(PU

22.5

)

(PU

22.5

)

(PU

22.5

)

(PU

22.5

)

(PD

100

GND --- --- ---

)

(PU

22.5

)

(PU

22.5

)

(PU

22.5

(PU

)

22.5

(PU

)

22.5

)

(PU

22.5

PWR --- --- ---

Typ e

, O

1/4

2/5

, O

TS1

2/5

PCI

STRP

PCI

3/5

, O

3/5

1/4

3/5

, O

Power

Rail Configuration

1/4VIO

PMR[17] = 0 and PMR[8] = 0

PMR[17] = 1 and PMR[8] = 0

PMR[17] = 0 and PMR[8] = 1

PMR[17] = 1 and PMR[8] = 1

8/8VIO

PMR[17] = 0 and PMR[8] = 0

PMR[17] = 1 and PMR[8] = 0

PMR[17] = 0 and PMR[8] = 1

PMR[17] = 1 and PMR[8] = 1

VIOCycle Multiplexed

VIO---

Strap (See Table 3-4 on page 45.)

VIO---

VIOPMR[21] = 0 and

PMR[2] = 0

PMR[21] = 0 and PMR[2] = 1

3/5

3/5VIO

PMR[21] = 1 and PMR[2] = 1

PMR[23]3 = 0 and PMR[13] = 0

PMR[23]3 = 0 and PMR[13] = 1

PMR[23]3 = 1

VIOPMR[12] = 0

3/5VIO

PMR[12] = 1

AMD Geode™ SC2200 Processor Data Book 31

32580B

Table 3-2. BGU481 Ball Assignment - Sorted by Ball Number (Continued)

14/14

1/4

PCI

, O

1/4

2/5

Power

Rail Configuration

C-

CCRT

1/4VIO

VIO---

1/4VIO

Ball No. Signal Name

D13 V

D14 V

D15 AV

CCCRT

I/O

Buffer

(PU/PD)

Typ e

GND --- --- ---

PWR --- --- ---

D16 VREF I/O WIRE AV

6, 2

PE I

D17

(PU PD

22.5

)

TFTD14 O O

F_C/BE2# O O

D18 V

D19 V

D20

6, 2

PD2 I/O INT,

PWR --- --- ---

GND --- --- ---

TFTD8 O O

F_AD2 O O

6, 2

ERR# I INT, O

D21

TFTD4 O O

F_C/BE0# O O

6, 2

AFD#/DSTRB# O O

D22

TFTD2 O O

INTR_O O O

D23 V

PWR --- --- ---

D24 NC --- --- --- ---

D25 V

D26 INTA# I

D27 AV

CCUSB

D28 GPIO6 I/O

DTR2#/BOUT2 O

IDE_IOR1# O

SDTEST5 O

GND --- --- ---

)

(PU

22.5

PWR --- --- ---

)

(PU

22.5

)

(PU

22.5

)

(PU

22.5

)

(PU

22.5

---

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0) (PU/PD under software control.)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

PMR[23]3 = 0 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 1 and (PMR[27] = 0 and FPCI_MON = 0)

PMR[23]3 = 0 and (PMR[27] = 1 or FPCI_MON = 1)

PMR[18] = 0 and PMR[8] = 0

PMR[18] = 1 and PMR[8] = 0

PMR[18] = 0 and PMR[8] = 1

PMR[18] = 1 and PMR[8] = 1

Signal Definitions

)

Buffer

Typ e

8/8

STRP

PCI

2/5

PCI

Power

Rail Configuration

VIO---

VIOCycle Multiplexed

VIOPMR[28] = 0

VIO---

VIOCycle Multiplexed

VIO---

VIOCycle Multiplexed

Ball No. Signal Name

I/O

(PU/PD)

D29 SOUT2 O O

CLKSEL2 I

)

(PD

100

D30 TDP I/O Diode --- ---

D31 TDN I/O WIRE V

E1 AD16 I/O IN

A16 O O

E2 AD19 I/O IN

A19 O O

E3 AD18 I/O IN

A18 O O

E4 DEVSEL# I/O

(PU

22.5

BHE# O O

E28 SIN2 I IN

SDTEST3 O O

E29 TRST# I

(PU

22.5

E30 TDO O O

E31 TCK I

(PU

22.5

F1 TRDY# I/O

(PU

22.5

D13 I/O

(PU

22.5

F2 IRDY# I/O

(PU

22.5

D14 I/O

(PU

22.5

F3 C/BE2# I/O

D10 I/O

(PU

22.5

F4 AD17 I/O IN

A17 O O

F28 TMS I

(PU

22.5

F29 TDI I

F30 GTEST I

(PU

(PD

22.5

F31 VPCKIN I IN

G1 STOP# I/O

D15 I/O

G2 V

G3 V

G4 V

G28 V

(PU

22.5

(PU

22.5

GND --- --- ---

PWR --- --- ---

GND --- --- ---

Strap (See Table 3-4 on page 45.)

---

PMR[28] = 1

32 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

Table 3-2. BGU481 Ball Assignment - Sorted by Ball Number (Continued)

Ball No. Signal Name

G29 V

G30 V

G31 VPD7 I IN

H1 SERR# I/O

H2 PERR# I/O

H3 LOCK# I/O

H4 C/BE3# I/O

D11 I/O

H28 VPD6 I IN

H29 VPD5 I IN

H30 VPD4 I IN

H31 VPD3 I IN

J1 AD13 I/O IN

A13 O O

J2 C/BE1# I/O

D9 I/O

J3 AD15 I/O IN

A15 O O

J4 PAR I/O

D12 I/O

J28 VPD2 I IN

J29 VPD1 I IN

J30 VPD0 I IN

J31 GPIO39 I/O

SERIRQ I/O IN

K1 AD11 I/O IN

A11 O O

K2 V

K3 V

K4 AD14 I/O IN

A14 O O

I/O

Buffer

(PU/PD)

Typ e

PWR --- --- ---

GND --- --- ---

22.5

)

(PU

)

(PU

22.5

)

(PU

22.5

)

(PU

22.5

)

(PU

22.5

)

(PU

22.5

)

(PU

22.5

)

(PU

PWR --- --- ---

GND --- --- ---

32580B

Power

Rail Configuration

VIO---

PCI

VIO---

PCI

VIO---

PCI

VIOCycle Multiplexed

PCI

VIO---

VIOCycle Multiplexed

PCI

VIOCycle Multiplexed

PCI

VIOCycle Multiplexed

PCI

VIOCycle Multiplexed

PCI

VIO---

PCI

PMR[14]4 = 0 and PMR[22]

PMR[14]4 = 1 and PMR[22]

VIOCycle Multiplexed

= 0

= 1

Ball No. Signal Name

K28 GPIO38/IRRX2 I/O

I/O

(PU/PD)

(PU

22.5

LPCPD# O O

K29 V

K30 V

K31 GPIO37 I/O

PWR --- --- ---

GND --- --- ---

(PU

22.5

LFRAME# O O

L1 C/BE0# I/O

D8 I/O

(PU

22.5

L2 AD9 I/O IN

A9 O O

L3 AD10 I/O IN

A10 O O

L4 AD12 I/O IN

A12 O O

L28 GPIO36 I/O

(PU

22.5

LDRQ# I IN

L29 GPIO35 I/O

(PU

22.5

LAD3 I/O

(PU

22.5

L30 GPIO34 I/O

LAD2 I/O

L31 GPIO33 I/O

LAD1 I/O

M1 V

(PU

22.5

(PU

22.5

(PU

22.5

(PU

22.5

GND --- --- ---

M2 AD7 I/O IN

A7 O O

M3 V

PWR --- --- ---

)

Buffer

Typ e

PCI

Power

Rail Configuration

PMR[14]4 = 0 and PMR[22]

The IRRX2 input is connected to the input path of GPIO38. There is no logic required to enable IRRX2, just a simple connection. Hence, when GPIO38 is the selected function, IRRX2 is also selected.

PMR[14]4 = 1 and PMR[22]

PMR[14]4 = 0 and PMR[22]

PMR[14]4 = 1 and PMR[22]

VIOCycle Multiplexed

PMR[14]4 = 0 and PMR[22]

PMR[14]4 = 1 and PMR[22]

PMR[14]4 = 0 and PMR[22]

PMR[14]4 = 1 and PMR[22]

PMR[14]4 = 0 and PMR[22]

PMR[14]4 = 1 and PMR[22]

PMR[14]4 = 0 and PMR[22]

PMR[14]4 = 1 and PMR[22]

VIOCycle Multiplexed

= 0.

= 1

= 0

= 1

= 0

= 1

= 0

= 1

= 0

= 1

= 0

= 1

AMD Geode™ SC2200 Processor Data Book 33

32580B

Table 3-2. BGU481 Ball Assignment - Sorted by Ball Number (Continued)

Ball No. Signal Name

M4 AD8 I/O IN

A8 O O

M28 GPIO32 I/O

LAD0 I/O

M29 GPIO13 I/O

AB2D I/O

M30 V

M31 V

N1 AD3 I/O IN

A3 O O

N2 AD6 I/O IN

A6 O

N3 AD5 I/O IN

A5 O O

N4 V

N13 V

N14 V

N15 V

N16 V

N17 V

N18 V

N19 V

N28 V

CORE

N29 GPIO12 I/O

AB2C I/O

N30 AB1D I/O

GPIO1 I/O

IOCS1# O O

N31 AB1C I/O

GPIO20 I/O

DOCCS# O O

P1 AD4 I/O IN

A4 O O

P2 IDE_CS1# O O

TFTDE O O

I/O

22.5

Buffer

)

(PU/PD)

(PU

)

(PU

22.5

)

(PU

22.5

PWR --- --- ---

GND --- --- ---

PWR --- --- ---

GND --- --- ---

PWR --- --- ---

GND --- --- ---

)

(PU

22.5

)

(PU

22.5

)

(PU

22.5

)

(PU

)

(PU

22.5

Typ e

Power

Rail Configuration

VIOCycle Multiplexed

PCI

, O

8/8VIO

PMR[14]4 = 0 and PMR[22]

PMR[14]4 = 1 and PMR[22]

PMR[19] = 0

, OD8VIOPMR[19] = 1

VIOCycle Multiplexed

PCI

VIOCycle Multiplexed

PCI

VIOCycle Multiplexed

PCI

, O

8/8VIO

, OD

, OD8V

, O

3/5

PMR[19] = 0

PMR[19] = 1

PMR[23]3 = 0

PMR[23]3 = 1 and PMR[13] = 0

PMR[23]3 = 1 and PMR[13] = 1

, OD8V

, O

3/5

PCI

1/4

PMR[23]3 = 0

3/5

PMR[23]3 = 1 and PMR[7] = 0

PMR[23]3 = 1 and PMR[7] = 1

VIOCycle Multiplexed

VIOPMR[24] = 0

PMR[24] = 1

= 0

= 1

Ball No. Signal Name

I/O

(PU/PD)

Buffer

P3 AD1 I/O IN

A1 O O

P4 V

P13 V

P14 V

P15 V

P16 V

P17 V

P18 V

P19 V

P28 V

CORE

PWR --- --- ---

GND --- --- ---

PWR --- --- ---

P29 SDATA_OUT O O

TFT_PRSNT I

(PD

100

)

P30 SYNC O O

CLKSEL3 I

(PD

100

)

P31 AC97_CLK O O

R1 V

R2 V

R3 V

R4 V

R13 V

R14 V

R15 V

R16 V

R17 V

R18 V

R19 V

R28 V

R29 V

R30 V

R31 V

T1 V

T2 V

T3 V

T4 V

T13 V

T14 V

T15 V

T16 V

T17 V

T18 V

T19 V

T28 V

T29 V

CORE

GND --- --- ---

PWR --- --- ---

GND --- --- ---

PWR --- --- ---

Typ e

PCI

AC97

STRP

AC97

STRP

2/5

Signal Definitions

Power

Rail Configuration

VIOCycle Multiplexed

VIO---

VIOStrap (See Table

3-4 on page 45.)

VIO---

Strap (See Table 3-4 on page 45.)

VIOPMR[25] = 1

34 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

Table 3-2. BGU481 Ball Assignment - Sorted by Ball Number (Continued)

Ball No. Signal Name

T30 V

T31 V

CORE

U1 AD0 I/O IN

A0 O O

U2 IDE_ADDR2 O O

TFTD4 O O

U3 AD2 I/O IN

A2 O O

U4 V

U13 V

U14 V

U15 V

U16 V

U17 V

U18 V

U19 V

U28 V

CORE

U29 AC97_RST# O O

F_STOP# O O

U30 BIT_CLK I IN

F_TRDY# O O

U31 SDATA_IN I IN

F_GNT0# O O

V1 IDE_DATA15 I/O IN

TFTD7 O O

V2 IDE_DATA14 I/O IN

TFTD17 O O

V3 IDE_DATA13 I/O IN

TFTD15 O O

V4 V

V13 V

V14 V

V15 V

V16 V

V17 V

V18 V

V19 V

V28 V

CORE

V29 SDCLK3 O O

V30 GXCLK O O

FP_VDD_ON O O

TEST3 O O

I/O

Buffer

(PU/PD)

Typ e

PWR --- --- ---

GND --- --- ---

PWR --- --- ---

GND --- --- ---

PWR --- --- ---

GND --- --- ---

PWR --- --- ---

GND --- --- ---

32580B

Power

Rail Configuration

VIOCycle Multiplexed

PCI

VIOPMR[24] = 0

1/4

PCI

PMR[24] = 1

VIOCycle Multiplexed

Ball No. Signal Name

V31 GPIO16 I/O

I/O

(PU/PD)

(PU

22.5

PC_BEEP O O

F_DEVSEL# O O

W1 V

W2 V

PWR --- --- ---

GND --- --- ---

W3 IDE_DATA12 I/O IN

TFTD13 O O

W4 IDE_DATA11 I/O IN

GPIO41 I/O IN

PWR --- --- ---

GND --- --- ---

PWR --- --- ---

GND --- --- ---

PWR --- --- ---

VIOFPCI_MON = 0

2/5

VIOFPCI_MON = 0

1/4

VIOFPCI_MON = 0

2/5

VIOPMR[24] = 0

TS1

1/4

VIOPMR[24] = 0

TS1

1/4

VIOPMR[24] = 0

TS1

1/4

FPCI_MON = 1

PMR[24] = 1

W13 V

W14 V

W15 V

W16 V

W17 V

W18 V

W19 V

W28

CORE

MD57 I/O INT, TS

W29 SDCLK1 O O

W30 V

W31 V

IDE_DATA10 I/O IN

DDC_SCL O OD

IDE_DATA9 I/O IN

DDC_SDA I/O IN

Y3 IDE_DATA8 I/O IN

GPIO40 I/O IN

Y4 IDE_IOR0# O O

TFTD10 O O

MD58 I/O INT, TS

Y28

MD59 I/O INT, TS

Y29

MD60 I/O INT, TS

Y30

MD56 I/O INT, TS

Y31

AA1 IDE_RST# O O

TFTDCK O O

AA2 IDE_DATA7 I/O IN

VIO---

2/5

1/4

2/5

PMR[23]3 = 0 and PMR[29] = 0

PMR[23]3 = 1

PMR[23]3 = 0 and PMR[29] = 1

INTD# I IN

AA3 IDE_DATA6 I/O IN

IRQ9 I IN

)

Buffer

Typ e

, O

, OD

Power

Rail Configuration

2/5VIO

2/5

VIOPMR[24] = 0

TS1

1/4

VIOPMR[24] = 0

TS1

1/4

TS1

1/4

2/5VIO

VIO---

2/5

VIOPMR[24] = 0

TS1

1/4

VIOPMR[24] = 0

TS1

1/4

VIOPMR[24] = 0

TS1

1/4

TS1

1/4

VIOPMR[24] = 0

1/4

2/5VIO

VIOPMR[24] = 0

1/4

VIOPMR[24] = 0

TS1

1/4

VIOPMR[24] = 0

TS1

1/4

TS1

PMR[0] = 0 and FPCI_MON = 0

PMR[0] = 1 = 0 and FPCI_MON = 0

FPCI_MON = 1

PMR[24] = 1

---

PMR[24] = 1

---

PMR[24] = 1

AMD Geode™ SC2200 Processor Data Book 35

32580B

Table 3-2. BGU481 Ball Assignment - Sorted by Ball Number (Continued)

Ball No. Signal Name

AA4 IDE_DATA5 I/O IN

CLK27M O O

AA28 SDCLK2 O O

MD61 I/O INT, TS

AA29

MD62 I/O INT, TS

AA30

MD63 I/O INT, TS

AA31

AB1 IDE_DATA4 I/O IN

FP_VDD_ON O O

AB2 V

AB3 V

AB4 IDE_DATA3 I/O IN

TFTD12 O O

MD24 I/O INT, TS

AB28

AB29 V

AB30 V

AB31 DQM7 O O

AC1 IDE_DATA1 I/O IN

TFTD16 O O

AC2 IDE_DATA2 I/O IN

TFTD14 O O

AC3 IDE_DATA0 I/O IN

TFTD6 O O

AC4 IDE_DREQ0 I IN

TFTD8 O O

MD25 I/O INT, TS

AC28

MD26 I/O INT, TS

AC29

MD27 I/O INT, TS

AC30

AC31 DQM3 O O

AD1 IDE_IORDY0 I IN

TFTD11 O O

AD2 IDE_IOW0# O O

TFTD9 O O

AD3 IDE_ADDR0 O O

TFTD3 O O

AD4 IDE_DACK0# O O

TFTD0 O O

MD52 I/O INT, TS

AD28

MD29 I/O INT, TS

AD29

MD30 I/O INT, TS

AD30

MD31 I/O INT, TS

AD31

AE1 IDE_ADDR1 O O

TFTD2 O O

AE2 V

I/O

(PU/PD)

Buffer

GND --- --- ---

PWR --- --- ---

GND --- --- ---

Typ e

TS1

Power

Rail Configuration

VIOPMR[24] = 0

1/4

VIO---

2/5

2/5VIO

VIOPMR[24] = 0

1/4

VIOPMR[24] = 0

1/4

2/5VIO

VIO---

2/5

VIOPMR[24] = 0

1/4

VIOPMR[24] = 0

1/4

VIOPMR[24] = 0

1/4

VIOPMR[24] = 0

1/4

2/5VIO

VIO---

2/5

VIOPMR[24] = 0

1/4

VIOPMR[24] = 0

1/4

VIOPMR[24] = 0

1/4

VIOPMR[24] = 0

1/4

2/5VIO

VIOPMR[24] = 0

1/4

PMR[24] = 1

---

PMR[24] = 1

---

PMR[24] = 1

---

PMR[24] = 1

---

PMR[24] = 1

STRP

TS1

1/4

8/8

, O

8/8

Power

2/5VIO

8/8VIO

Ball No. Signal Name

AE3 V

AE4 V

AE28 V

AE29 V

AE30 V

AE31

MD28 I/O INT, TS

I/O

Buffer

(PU/PD)

Typ e

PWR --- --- ---

GND --- --- ---

PWR --- --- ---

GND --- --- ---

AF1 IRQ14 I IN

TFTD1 O O

AF2 IDE_CS0# O O

TFTD5 O O

AF3 SOUT1 O O

CLKSEL1 I

(PD

100

)

AF4 OVER_CUR# I IN

MD50 I/O INT, TS

AF28

MD49 I/O INT, TS

AF29

MD54 I/O INT, TS

AF30

MD53 I/O INT, TS

AF31

AG1 GPIO18 I/O

(PU

22.5

)

DTR1#/BOUT1 O

(PU

)

22.5

AG2 SIN1 I IN

AG3 X27I I WIRE V

TEST1 O O

AG4

PLL6B I/O IN

MD21 I/O INT, TS

AG28

AG29 DQM6 O O

AG30 DQM2 O O

MD55 I/O INT, TS

AG31

AH1 POWER_EN O O

2/5

2/5VIO

2/5

2/5VIO

1/4

AH2 X27O O WIRE V

TEST0 O O

AH3

PLL2B I/O IN

AH4 V

PWR --- --- ---

AH5 PWRBTN# I

(PU

AH6 GPWIO0 I/O

AH7 V

(PU

GND --- --- ---

AH8 CLK32 O O

AH9 POR# I IN

MD3 I/O INT, TS

AH10

MD5 I/O INT, TS

AH11

AH12 WEA# O O

AH13 V

AH14 V

GND --- --- ---

PWR --- --- ---

AH15 MA1 O O

100

2/5

, TS

2/5

BTN

)

2/14

2/5

2/5VIO

2/5

Signal Definitions

Rail Configuration

---

VIOPMR[24] = 0

PMR[24] = 1

VIOPMR[24] = 0

PMR[24] = 1

VIO---

Strap (See Table 3-4 on page 45.)

VIO---

---

PMR[16] = 0

PMR[16] =1

VIO---

---

VIOPMR[29] = 1

PMR[29] = 0

---

VIO---

---

VIO---

---

VIOPMR[29] = 1

PMR[29] = 0

VSB---

VIO---

---

VIO---

36 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

Table 3-2. BGU481 Ball Assignment - Sorted by Ball Number (Continued)

Ball No. Signal Name

MD34 I/O INT, TS

AH16

MD37 I/O INT, TS

AH17

AH18 V

AH19 V

AH20

MD41 I/O INT, TS

I/O

(PU/PD)

PWR --- --- ---

GND --- --- ---

AH21 MA9 O O

AH22 MA8 O O

AH23 DQM1 O O

MD13 I/O INT, TS

AH24

AH25 V

GND --- --- ---

AH26 MA11 O O

AH27 CS1# O O

MD18 I/O INT, TS

AH28

MD48 I/O INT, TS

AH29

MD20 I/O INT, TS

AH30

MD51 I/O INT, TS

AH31

TEST2 O O

AJ1

PLL5B I/O IN

AJ2 X32I I WIRE V

AJ3 X32O O WIRE V

AJ4 V

AJ5

PLL3

6, 2

ONCTL# O OD

AJ6 GPWIO2 I/O

AJ7 V

AJ8 GPIO11 I/O

PWR --- --- ---

(PU

)

100

PWR --- --- ---

(PU

)

22.5

RI2# I

)

(PU

22.5

IRQ15 I

MD0 I/O INT, TS

AJ9

AJ10 V

AJ11

MD6 I/O INT, TS

)

(PU

22.5

PWR --- --- ---

AJ12 CASA# O O

AJ13 BA0 O O

AJ14 MA10 O O

MD32 I/O INT, TS

AJ15

MD33 I/O INT, TS

AJ16

MD36 I/O INT, TS

AJ17

MD47 I/O INT, TS

AJ18

MD45 I/O INT, TS

AJ19

MD42 I/O INT, TS

AJ20

AJ21 SDCLK0 O O

AJ22 V

PWR --- --- ---

AJ23 MA6 O O

AJ24 MA3 O O

AJ25 V

PWR --- --- ---

Buffer

Typ e

2/5

, TS

2/14

, O

TS1

2/5

2/5VIO

2/5

8/8VIO

2/5VIO

Power

Rail Configuration

---

VIO---

---

VIO---

---

VIOPMR[29] = 1

PMR[29] = 0

---

BAT

---

BAT

VSB---

PMR[18] = 0 and PMR[8] = 0

PMR[18] = 1 and PMR[8] = 0

PMR[18] = 0 and PMR[8] = 1

---

VIO---

---

VIO---

32580B

Ball No. Signal Name

MD11 I/O INT, TS

AJ26

AJ27 SDCLK_IN I IN

MD19 I/O INT, TS

AJ28

AJ29 V

AJ30

AJ31

AK1 V

AK2 V

AK3 AV

MD22 I/O INT, TS

MD17 I/O INT, TS

SSPLL3

AK4 THRM# I IN

AK5 GPWIO1 I/O

6, 2

PWRCNT1 O OD

AK6

AK7 V

AK8 IRRX1 I IN

SIN3 I IN

MD1 I/O INT, TS

AK9

AK10 V

AK11

MD7 I/O INT, TS

AK12 RASA# O O

AK13 V

AK14 BA1 O O

AK15 MA2 O O

AK16 V

AK17

AK18

AK19 V

AK20

MD35 I/O INT, TS

MD46 I/O INT, TS

MD43 I/O INT, TS

AK21 DQM5 O O

AK22 V

AK23 MA5 O O

MD15 I/O INT, TS

AK24

AK25 V

AK26

AK27

MD14 I/O INT, TS

MD12 I/O INT, TS

AK28 SDCLK_OUT O O

MD16 I/O INT, TS

AK29

AK30 V

AK31 V

AL1 V

AL2 V

AL3 V

BAT

AL4 LED# O OD

AL5 V

AL6 V

AL7

SBL

6, 2

PWRCNT2 O OD

I/O

(PU/PD)

Buffer

Typ e

PWR --- --- ---

GND --- --- ---

(PU

100

)

GND --- --- ---

PWR --- --- ---

PWR --- ---

PWR --- --- ---

GND --- --- ---

PWR --- --- ---

GND --- --- ---

PWR --- --- ---

Power

Rail Configuration

2/5VIO

VIO---

2/5VIO

VSB---

2/14

VSB---

VSBPMR[6] = 0

VIOPMR[6] =1

2/5VIO

VIO---

2/5

VIO---

2/5

VIO---

2/5

2/5VIO

VIO---

2/5

VIO---

2/5

2/5VIO

VIO---

2/5

2/5VIO

VSB---

---

AMD Geode™ SC2200 Processor Data Book 37

32580B

Table 3-2. BGU481 Ball Assignment - Sorted by Ball Number (Continued)

Ball No. Signal Name

AL8 SDATA_IN2 I IN

MD2 I/O INT, TS

AL9

MD4 I/O INT, TS

AL10

AL11 DQM0 O O

AL12 CS0# O O

AL13 V

AL14 MA0 O O

AL15 DQM4 O O

AL16 V

AL17

AL18

AL19 V

AL20

AL21

MD38 I/O INT, TS

MD39 I/O INT, TS

MD44 I/O INT, TS

MD40 I/O INT, TS

AL22 CKEA O O

AL23 MA7 O O

AL24 MA4 O O

I/O

Buffer

(PU/PD)

Typ e

GND --- --- ---

Power

Rail Configuration

VSBF3BAR0+Mem-

2/5VIO

VIO---

2/5

VIO---

2/5

VIO---

2/5

VIO---

2/5

2/5VIO

VIO---

2/5

VIO---

2/5

VIO---

2/5

ory Offset 08h[21] = 1

---

Signal Definitions

Ball No. Signal Name

MD8 I/O INT, TS

AL25

MD10 I/O INT, TS

AL26

MD9 I/O INT, TS

AL27

I/O

(PU/PD)

Buffer

Typ e

AL28 MA12 O O

MD23 I/O INT, TS

AL29

AL30 V

AL31 V

1. For Buffer Type definitions, refer to Table 9-10 "Buffer Types" on page

2. Is 5V tolerant (ACK#, AFD#/DSTRB#, BUSY/WAIT#, ERR#, INIT#,

3. The TFT_PRSNT strap determines the power-on reset (POR) state of

4. The LPC_ROM strap determines the power-on reset (POR) state of

5. May need 5V tolerant protection at system level (DDC_SCL,

6. Is back-drive protected (MD[63:0], DPOS_PORT1, DNEG_PORT1,

376.

PD[7:0], PE, SLCT, SLIN#/ASTRB#, STB#/WRITE#, ONCTL#, PWRCNT[2:1]).

PMR[23].

PMR[14] and PMR[22].

DDC_SDA).

DPOS_PORT2, DNEG_PORT2, DPOS_PORT3, DNEG_PORT3, ACK#, AFD#/DSTRB#, BUSY/WAIT#, ERR#, INIT#, PD[7:0], PE, S LCT,

PWR --- --- ---

GND --- --- ---

SLIN#/ASTRB#, STB#/WRITE#, ONCTL#, PWRCNT[2:1]).

Power

Rail Configuration

2/5VIO

VIO---

2/5

2/5VIO

---

38 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

32580B

Table 3-3. BGU481 Ball Assignment - Sorted Alphabetically by Signal Name

Signal Name Ball No.

A0 U1

A1 P3

A2 U3

A3 N1

A4 P1

A5 N3

A6 N2

A7 M2

A8 M4

A9 L2

A10 L3

A11 K1

A12 L4

A13 J1

A14 K4

A15 J3

A16 E1

A17 F4

A18 E3

A19 E2

A20 D3

A21 D1

A22 D2

A23 B6

AB1C N31

AB1D N30

AB2C N29

AB2D M29

AC97_CLK P31

AC97_RST# U29

ACK# B18

AD0 U1

AD1 P3

AD2 U3

AD3 N1

AD4 P1

AD5 N3

AD6 N2

AD7 M2

AD8 M4

AD9 L2

AD10 L3

AD11 K1

AD12 L4

AD13 J1

AD14 K4

AD15 J3

AD16 E1

AD17 F4

Signal Name Ball No.

AD18 E3

AD19 E2

AD20 D3

AD21 D1

AD22 D2

AD23 B6

AD24 C2

AD25 C4

AD26 C1

AD27 D4

AD28 B4

AD29 B3

AD30 A3

AD31 D5

AFD#/DSTRB# D22

CCCRT

CCUSB

SSCRT

SSPLL2

SSPLL3

SSUSB

A12, C13, D15

D27

B14, C14, C15

C16

AK3

C27

BA0 AJ13

BA1 AK14

BHE# E4

BIT_CLK U30

BLUE A15

BOOT16 C8

BUSY/WAIT# B17

C/BE0# L1

C/BE1# J2

C/BE2# F3

C/BE3# H4

CASA# AJ12

CKEA AL22

CLK27M AA4

CLK32 AH8

CLKSEL0 B8

CLKSEL1 AF3

CLKSEL2 D29

CLKSEL3 P30

CS0# AL12

CS1# AH27

CTS2# C31

D0 C2

D1 C4

D2 C1

D3 D4

D4 B4

Signal Name Ball No.

D5 B3

D6 A3

D7 D5

D8 L1

D9 J2

D10 F3

D11 H4

D12 J4

D13 F1

D14 F2

D15 G1

DCD2# C28

DDC_SCL Y1

DDC_SDA Y2

DEVSEL# E4

DID0 C5

DID1 C6

DNEG_PORT1 A29

DNEG_PORT2 B28

DNEG_PORT3 A27

DOCCS# A9, N31

DOCR# D9

DOCW# A8

DPOS_PORT1 A28

DPOS_PORT2 B27

DPOS_PORT3 A26

DQM0 AL11

DQM1 AH23

DQM2 AG30

DQM3 AC31

DQM4 AL15

DQM5 AK21

DQM6 AG29

DQM7 AB31

DSR2# B29

DTR1#/BOUT1 AG1

DTR2#/BOUT2 D28

ERR# D21

F_AD0 C21

F_AD1 A21

F_AD2 D20

F_AD3 C20

F_AD4 C18

F_AD5 C19

F_AD6 A20

F_AD7 A18

F_C/BE0# D21

F_C/BE1# B17

F_C/BE2# D17

AMD Geode™ SC2200 Processor Data Book 41

32580B

Signal Definitions

Table 3-3. BGU481 Ball Assignment - Sorted Alphabetically by Signal Name (Continued)

Signal Name Ball No.

F_C/BE3# C17

F_DEVSEL# V31

F_FRAME# A22

F_GNT0# U31

F_IRDY# B20

F_STOP# U29

F_TRDY# U30

FP_VDD_ON V30, AB1

FPCI_MON A4

FPCICLK B18

FRAME# D8

GNT0# C5

GNT1# C6

GPIO0 D11

GPIO1 D10, N30

GPIO6 D28

GPIO7 C30

GPIO8 C31

GPIO9 C28

GPIO10 B29

GPIO11 AJ8

GPIO12 N29

GPIO13 M29

GPIO14 D9

GPIO15 A8

GPIO16 V31

GPIO17 A10

GPIO18 AG1

GPIO19 C9

GPIO20 A9, N31

GPIO32 M28

GPIO33 L31

GPIO34 L30

GPIO35 L29

GPIO36 L28

GPIO37 K31

GPIO38/IRRX2 K28

GPIO39 J31

GPIO40 Y3

GPIO41 W4

GPWIO0 AH6

GPWIO1 AK5

GPWIO2 AJ6

GREEN A14

GTEST F30

GXCLK V30

HSYNC A11

IDE_ADDR0 AD3

IDE_ADDR1 AE1

Signal Name Ball No.

IDE_ADDR2 U2

IDE_CS0# AF2

IDE_CS1# P2

IDE_DACK0# AD4

IDE_DACK1# C30

IDE_DATA0 AC3

IDE_DATA1 AC1

IDE_DATA2 AC2

IDE_DATA3 AB4

IDE_DATA4 AB1

IDE_DATA5 AA4

IDE_DATA6 AA3

IDE_DATA7 AA2

IDE_DATA8 Y3

IDE_DATA9 Y2

IDE_DATA10 Y1

IDE_DATA11 W4

IDE_DATA12 W3

IDE_DATA13 V3

IDE_DATA14 V2

IDE_DATA15 V1

IDE_DREQ0 AC4

IDE_DREQ1 C31

IDE_IOR0# Y4

IDE_IOR1# D28

IDE_IORDY0 AD1

IDE_IORDY1 B29

IDE_IOW0# AD2

IDE_IOW1# C28

IDE_RST# AA1

INIT# B21

INTA# D26

INTB# C26

INTC# C9

INTD# AA2

INTR_O D22

IOCHRDY C9

IOCS0# A10

IOCS1# D10

IOCS1# N30

IOR# D9

IOW# A8

IRDY# F2

IRQ9 AA3

IRQ14 AF1

IRQ15 AJ8

IRRX1 AK8

IRTX C11

LAD0 M28

Signal Name Ball No.

LAD1 L31

LAD2 L30

LAD3 L29

LDRQ# L28

LED# AL4

LFRAME# K31

LOCK# H3

LPC_ROM D6

LPCPD# K28

MA0 AL14

MA1 AH15

MA2 AK15

MA3 AJ24

MA4 AL24

MA5 AK23

MA6 AJ23

MA7 AL23

MA8 AH22

MA9 AH21

MA10 AJ14

MA11 AH26

MA12 AL28

MD0 AJ9

MD1 AK9

MD2 AL9

MD3 AH10

MD4 AL10

MD5 AH11

MD6 AJ11

MD7 AK11

MD8 AL25

MD9 AL27

MD10 AL26

MD11 AJ26

MD12 AK27

MD13 AH24

MD14 AK26

MD15 AK24

MD16 AK29

MD17 AJ31

MD18 AH28

MD19 AJ28

MD20 AH30

MD21 AG28

MD22 AJ30

MD23 AL29

MD24 AB28

MD25 AC28

MD26 AC29

42 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

Table 3-3. BGU481 Ball Assignment - Sorted Alphabetically by Signal Name (Continued)

32580B

Signal Name Ball No.

MD27 AC30

MD28 AE31

MD29 AD29

MD30 AD30

MD31 AD31

MD32 AJ15

MD33 AJ16

MD34 AH16

MD35 AK17

MD36 AJ17

MD37 AH17

MD38 AL17

MD39 AL18

MD40 AL21

MD41 AH20

MD42 AJ20

MD43 AK20

MD44 AL20

MD45 AJ19

MD46 AK18

MD47 AJ18

MD48 AH29

MD49 AF29

MD50 AF28

MD51 AH31

MD52 AD28

MD53 AF31

MD54 AF30

MD55 AG31

MD56 Y31

MD57 W28

MD58 Y28

MD59 Y29

MD60 Y30

MD61 AA29

MD62 AA30

MD63 AA31

NC (Total of 8) A23, A24, A25,

B23, B26, C23, C24, D24

ONCTL# AJ5

OVER_CUR# AF4

PA R J 4

PC_BEEP V31

PCICLK A7

PCICLK0 A4

PCICLK1 D6

PCIRST# A6

PD0 C21

PD1 A21

Signal Name Ball No.

PD2 D20

PD3 C20

PD4 C18

PD5 C19

PD6 A20

PD7 A18

PE D17

PERR# H2

PLL2B AH3

PLL5B AJ1

PLL6B AG4

POR# AH9

POWER_EN AH1

PWRBTN# AH5

PWRCNT1 AK6

PWRCNT2 AL7

RASA# AK12

RD# B8

RED B12

REQ0# B5

REQ1# A5

RI2# AJ8

ROMCS# C8

RTS2# C30

SDATA_IN U31

SDATA_IN2 AL8

SDATA_OUT P29

SDCLK_IN AJ27

SDCLK_OUT AK28

SDCLK0 AJ21

SDCLK1 W29

SDCLK2 AA28

SDCLK3 V29

SDTEST0 C30

SDTEST1 B29

SDTEST2 C28

SDTEST3 E28

SDTEST4 C31

SDTEST5 D28

SERIRQ J31

SERR# H1

SETRES B15

SIN1 AG2

SIN2 E28

SIN3 AK8

SLCT C17

SLIN#/ASTRB# B20

SMI_O B21

SOUT1 AF3

Signal Name Ball No.

SOUT2 D29

SOUT3 C11

STB#/WRITE# A22

STOP# G1

SYNC P30

TCK E31

TDI F29

TDN D31

TDO E30

TDP D30

TEST0 AH3

TEST1 AG4

TEST2 AJ1

TEST3 V30

TFT_PRSNT P29

TFTD0 A9, AD4

TFTD1 A20, AF1

TFTD2 D22, AE1

TFTD3 B17, AD3

TFTD4 D21, U2

TFTD5 B21, AF2

TFTD6 C21, AC3

TFTD7 A21, V1

TFTD8 D20, AC4

TFTD9 C20, AD2

TFTD10 C18, Y4

TFTD11 C19, AD1

TFTD12 D10, AB4

TFTD13 A18, W3

TFTD14 D17, AC2

TFTD15 C17, V3

TFTD16 B20, AC1

TFTD17 A22, V2

TFTDCK A10, AA1

TFTDE B18, P2

THRM# AK4

TMS F28

TRDE# D11

TRDY# F1

TRST# E29

BAT

CCCRT

(Total of 28) N13, N14, N18,

CORE

AL3

D12

N19, P4, P13, P14, P18, P19, P28, T1, T2, T3, T4, T28, T29, T30, T31, U4, U28, V13, V14, V18, V19, W13, W14, W18, W19

AMD Geode™ SC2200 Processor Data Book 43

32580B

Signal Definitions

Table 3-3. BGU481 Ball Assignment - Sorted Alphabetically by Signal Name (Continued)

Signal Name Ball No.

VIO (Total of 43) A2, A30, B2, B13,

B16, B19, B31, C3, C7, C10, C22, C25, C29, D14, D18, D23, G3, G29, K2, K29, M3, M30, W1, W31, AB3, AB29, AE3, AE29, AH4, AH14, AH18, AJ7, AJ10, AJ22, AJ25, AJ29, AK1, AK13, AK16, AK19, AK31, AL2, AL30

VPCKIN F31

VPD0 J30

VPD1 J29

VPD2 J28

VPD3 H31

VPD4 H30

VPD5 H29

VPD6 H28

VPD7 G31

PLL2

PLL3

A17

AJ4

VREF D16

SBL

AL5

AL6

Signal Name Ball No.

VSS (Total of 92) A1, A13, A16,

A19, A31, B1, B7, B10, B22, B24, B25, B30, D7, D13, D19, D25, G2, G4, G28, G30, K3, K30, M1, M31, N4, N15, N16, N17, N28, P15, P16, P17, R1, R2, R3, R4, R13, R14, R15, R16, R17, R18, R19, R28, R29, R30, R31, T13, T14, T15, T16, T17, T18, T19, U13, U14, U15, U16, U17, U18, U19, V4, V15, V16, V17, V28, W2, W15, W16, W17, W30, AB2, AB30, AE2, AE4, AE28, AE30, AH7, AH13, AH19, AH25, AK2, AK7, AK10, AK22, AK25, AK30, AL1, AL13, AL16, AL19, AL31

SSCRT

C12

VSYNC B11

WEA# AH12

WR# B9

X27I AG3

X27O AH2

X32I AJ2

X32O AJ3

44 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

3.2 Strap Options

Several balls are read at power-up that set up the state of the SC2200. These balls are typically multiplexed with other functions that are outputs after the power-up sequence is complete. The SC2200 must read the state of the balls at power-up and the internal PU or PD resistors do not guarantee the correct state will be read. Therefore, it is required that an external PU or PD resistor with a value

Table 3-4. Strap Options

Nominal

Internal

Strap Option Muxed With Ball No.

CLKSEL0 RD# B8 PD

CLKSEL1 SOUT1 AF3 PD

CLKSEL2 SOUT2 D29 PD

CLKSEL3 SYNC P30 PD

BOOT16 ROMCS# C8 PD

TFT_PRSNT SDATA_OUT P29 PD

LPC_ROM PCICLK1 D6 PD

FPCI_MON PCICLK0 A4 PD

DID0 GNT0# C5 PD

DID1 GNT1# C6 PD

Note: Accuracy of internal PU/PD resistors: 80K to 250K.

Location of the GCB (General Configuration Block) cannot be determined by software. See the AMD Geode™ SC2200 Proces- sor Specification Update document.

PU or PD

External PU/PD Strap Settings

See Table 4-7 on page 89 for

100

CLKSEL strap options.

100

Enable boot

100

from 8-bit ROM

TFT not muxed

100

onto Parallel Por t

Disable boot

100

from ROM on LPC bus

Disable Fast-

100

PCI, INTR_O, and SMI_O monitoring signals.

Defines the system-level chip ID. GCB+I/O Offset 34h[31,29] (aka MCR regis-

100

32580B

of 1.5 KΩ be placed on the balls listed in Table 3-4. The value of the resistor is important to ensure that the proper state is read during the power-up sequence. If the ball is not read correctly at power-up, the SC2200 may default to a state that causes it to function improperly, possibly resulting in application failure.

GCB+I/O Offset 1Eh[9:8] (aka CCFC register bits [9:8]) (RO): Value programmed at reset by CLKSEL[1:0].

GCB+I/O Offset 10h[3:0] (aka MCCM register bits [3:0]) (RO): Value programmed at reset by CLKSEL[3:0].

GCB+I/O Offset 1Eh[3:0] (aka CCFC register bits [3:0]) (R/W, but write not recommended): Value programmed at reset by CLKSEL[3:0].

Note: Values for GCB+I/O Offset 10h[3:0] and 1Eh[3:0] are not the same.

Enable boot from 16-bit ROM

TFT muxed onto Parallel Por t

Enable boot from ROM on LPC bus

Enable FastPCI, INTR_O, and SMI_O monitoring signals. (Useful during debug.)

GCB+I/O Offset 34h[3] (aka MCR register bit

3) (RO): Reads back strap setting.

GCB+I/O Offset 34h[14] (R/W): Used to allow the ROMCS# width to be changed under program control.

GCB+I/O Offset 30h[23] (aka PMR register bit 23) (R/W): Reads back strap setting.

F0BAR1+I/O Offset 10h[15] (R/W): Reads back strap setting and allows LPC ROM to be changed under program control.

GCB+I/O Offset 34h[30] (aka MCR register bit 30) (RO): Reads back strap setting.

Note: For normal operation, strap this signal low using a 1.5 KΩ resistor.

ter bits 31 and 29) (RO): Reads back strap setting.

Note: GNT0# must have a PU resistor of 1.5 KΩ and GNT1# must have a PD resistor of

1.5 KΩ.

AMD Geode™ SC2200 Processor Data Book 45

32580B

3.3 Multiplexing Configuration

The tables that follow list multiplexing options and their configurations. Certain multiplexing options may be chosen per signal; others are available only for a group of signals.

Where ever a GPIO pin is multiplexed with another function, there is an optional pull-up resistor on this pin; after

Table 3-5. Two-Signal/Group Multiplexing

Default Alternate

Signal Definitions

system reset, the pull-up is present. This pull-up resistor can be disabled by writing Core Logic registers. The configuration is without regard to the selected ball function. The above applies to all pins multiplexed with GPIO, except GPIO12, GPIO13, and GPIO16.

Ball No.

AD3 IDE_ADDR0 PMR[24] = 0 TFTD3 PMR[24] = 1

AE1 IDE_ADDR1 TFTD2

U2 IDE_ADDR2 TFTD4

AC3 IDE_DATA0 TFTD6

AC1 IDE_DATA1 TFTD16

AC2 IDE_DATA2 TFTD14

AB4 IDE_DATA3 TFTD12

AB1 IDE_DATA4 FP_VDD_ON

AA4 IDE_DATA5 CLK27M

AA3 IDE_DATA6 IRQ9

AA2 IDE_DATA7 INTD#

Y3 IDE_DATA8 GPIO40

Y2 IDE_DATA9 DDC_SDA

Y1 IDE_DATA10 DDC_SCL

W4 IDE_DATA11 GPIO41

W3 IDE_DATA12 TFTD13

V3 IDE_DATA13 TFTD15

V2 IDE_DATA14 TFTD17

V1 IDE_DATA15 TFTD7

Y4 IDE_IOR0# TFTD10

AD1 IDE_IORDY0 TFTD11

AC4 IDE_DREQ0 TFTD8

AD2 IDE_IOW0# TFTD9

AF2 IDE_CS0# TFTD5

P2 IDE_CS1# TFTDE

AD4 IDE_DACK0# TFTD0

AA1 IDE_RST# TFTDCK

AF1 IRQ14 TFTD1

Signal Configuration Signal Configuration

IDE TFT, CRT, PCI, GPIO, System

Sub-ISA GPIO

D11 TRDE# PMR[12] = 0 GPIO0 PMR[12] = 1

46 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

32580B

Table 3-5. Two-Signal/Group Multiplexing (Continued)

Default Alternate

Ball No.

Signal Configuration Signal Configuration

GPIO ACCESS.bus

N29 GPIO12 PMR[19] = 0 AB2C PMR[19] = 1

M29 GPIO13 AB2D

GPIO UART

AG1 GPIO18 PMR[16] = 0 DTR1#/BOUT1 PMR[16] = 1

Infrared UART

C11 IRTX PMR[6] = 0 SOUT3 PMR[6] = 1

AK8 IRRX1 SIN3

GPIO LPC

M28 GPIO32 PMR[14] = 0 and PMR[22] = 0LAD0 PMR[14] = 1 and PMR[22] =

L31 GPIO33 LAD1

L30 GPIO34 LAD2

L29 GPIO35 LAD3

L28 GPIO36 LDRQ#

K31 GPIO37 LFRAME#

K28 GPIO38/IRRX2 LPCPD#

J31 GPIO39 SERIRQ

UART Internal Test

E28 SIN2 PMR[28] = 0 SDTEST3 PMR[28] = 1

AC97 FPCI Monitoring

U29 AC97_RST# FPCI_MON = 0 F_STOP# FPCI_MON = 1

U31 SDATA_IN F_GNT0#

U30 BIT_CLK F_TRDY#

Internal Test Internal Test

AG4 PLL6B PMR[29] = 0 TEST1 PMR[29] = 1

AJ1 PLL5B TEST2

AH3 PLL2B TEST0

AMD Geode™ SC2200 Processor Data Book 47

32580B

Table 3-6. Three-Signal/Group Multiplexing

Default Alternate1 Alternate2

Ball No.

D9 IOR# PMR[21] = 0 and

A8 IOW# DOCW# GPIO15

V31 GPIO16 PMR[0] = 0 and

C9 GPIO19 PMR[9] = 0 and

B18 ACK# PMR[23] = 0 and

D22 AFD#/DSTRB# TFTD2 INTR_O

B17 BUSY/WAIT# TFTD3 F_C/BE1#

D21 ERR# TFTD4 F_C/BE0#

B21 INIT# TFTD5 SMI_O

C21 PD0 TFTD6 F_AD0

A21 PD1 TFTD7 F_AD1

D20 PD2 TFTD8 F_AD2

C20 PD3 TFTD9 F_AD3

C18 PD4 TFTD10 F_AD4

C19 PD5 TFTD11 F_AD5

A20 PD6 TFTD1 F_AD6

A18 PD7 TFTD13 F_AD7

D17 PE TFTD14 F_C/BE2#

C17 SLCT TFTD15 F_C/BE3#

B20 SLIN#

A22 STB#/WRITE# TFTD17 F_FRAME#

A10 GPIO17 PMR[23] = 0 and

A9 GPIO20 PMR[23] = 0 and

D10 GPIO1 PMR[23] = 0 and

N31 AB1C PMR[23] = 0 GPIO20 PMR[23] = 1 and

N30 AB1D PMR[23] = 0 GPIO1 PMR[23] = 1 and

AJ8 GPIO11 PMR[18] = 0 and

Signal Configuration Signal Configuration Signal Configuration

Sub-ISA Sub-ISA

DOCR# PMR[21] = 0 and

PMR[2] = 0

GPIO14 PMR[21] = 1 and

PMR[2] = 1

GPIO AC97 FPCI Monitoring

FPCI_MON = 0

GPIO PCI

INTC# PMR[9] = 0 and

PC_BEEP PMR[0] = 1 = 0 and

PMR[4] = 0

PMR[4] = 1

Parallel Port TFT

TFTDE PMR[23] = 1 and (PMR[27] = 0 and FPCI_MON = 0)

(PMR[27] = 0 and FPCI_MON = 0)

F_DEVSEL FPCI_MON = 1

IOCHRDY PMR[9] = 1 and

FPCI_CLK PMR[23] = 0 and

TFTD16 F_IRDY

/ASTRB#

GPIO Sub-ISA TFT

PMR[5] = 0

PMR[7] = 0

PMR[13] = 0

IOCS0# PMR[23] = 0 and

PMR[5] = 1

DOCCS# PMR[23] = 0 and

PMR[7] = 1

IOCS1# PMR[23] = 0 and

PMR[13] = 1

TFTDCK PMR[23] = 1

TFTD0 PMR[23] = 1

TFTD12 PMR[23] = 1

AB1 GPIO Sub-ISA

DOCCS# PMR[23] = 1 and

PMR[7] = 0

IOCS1# PMR[23] = 1 and

PMR[13] = 0

GPIO UART2 IDE2

PMR[8] = 0

RI2# PMR[18] = 1 and

PMR[8] = 0

IRQ15 PMR[18] = 0 and

Signal Definitions

GPIO

PMR[2] = 1

Sub-ISA

PMR[4] = 1

FPCI Monitoring

(PMR[27] = 1 or FPCI_MON = 1)

PMR[7] = 1

PMR[13] = 1

PMR[8] = 1

48 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

32580B

Table 3-6. Three-Signal/Group Multiplexing (Continued)

Default Alternate1 Alternate2

Ball No.

V30 GXCLK PMR[23] = 0 and

1. The combination of PMR[21] = 1 and PMR[2] = 0 is undefined and should not be used.

2. The combination of PMR[9] = 1 and PMR[4] = 0 is undefined and should not be used.

3. These TFT outputs are reset to 0 by POR# if the TFT_PRSNT strap is pulled high or PMR[10] = 0. This relates to signals TFTD[17:0], TFTDE, TFTDCK.

Signal Configuration Signal Configuration Signal Configuration

Internal Test Internal Test TFT

PMR[29] = 0

TEST3 PMR[23] = 0 and

PMR[29] = 1

FP_VDD_ON PMR[23] = 1

Table 3-7. Four-Signal/Group Multiplexing

Ball

No.

C30 GPIO7 PMR[17] = 0

C31 GPIO8 CTS2# IDE_DREQ1 SDTEST4

D28 GPIO6 PMR[18] = 0

C28 GPIO9 DCD2# IDE_IOW1# SDTEST2

B29 GPIO10 DSR2# IDE_IORDY1 SDTEST1

Default Alternate1 Alternate2 Alternate3

Signal Configuration Signal Configuration Signal Configuration Signal Configuration

GPIO UART2 IDE2 Internal Test

SDTEST0 PMR[17] = 1

and PMR[8] = 1

SDTEST5 PMR[18] = 1

and PMR[8] = 1

and PMR[8] = 0

RTS2# PMR[17] = 1

and PMR[8] = 0

DTR2#/BOUT2 PMR[18] = 1

and PMR[8] = 0

IDE_DACK1# PMR[17] = 0

and PMR[8] = 1

IDE_IOR1# PMR[18] = 0

and PMR[8] = 1

AMD Geode™ SC2200 Processor Data Book 49

32580B

Signal Definitions

3.4 Signal Descriptions

Information in the tables that follow may have duplicate information in multiple tables. Multiple references all contain identical information.

3.4.1 System Interface

Signal Name Ball No. Type Description Mux

CLKSEL1 AF3 I Fast-PCI Clock Selects. These strap signals are used to

CLKSEL0 B8 RD#

CLKSEL3 P30 I Maximum Core Clock Multiplier. These strap signals

CLKSEL2 D29 SOUT2

BOOT16 C8 I Boot ROM is 16 Bits Wide. This strap signal enables

LPC_ROM D6 I LPC_ROM. This strap signal forces selecting of the LPC

TFT_PRSNT P29 I TFT Present. A strap used to select multiplexing of TFT

FPCI_MON A4 I Fast-PCI Monitoring. The strap on this ball forces selec-

DID1 C6 I Device ID. Together, the straps on these signals define

DID0 C5 I GNT0#

POR# AH9 I Power On Reset. POR# is the system reset signal gen-

set the internal Fast-PCI clock.

00 = 33.3 MHz 01 = 48 MHz 10 = 66.7 MHz 11 = 33.3 MHz

During system reset, an internal pull-down resistor of 100 KΩ exists on these balls. An external pull-up or pull-down resistor of 1.5 KΩ must be used.

are used to set the maximum allowed multiplier value for the core clock.

During system reset, an internal pull-down resistor of 100 KΩ exists on these balls. An external pull-up or pull-down resistor of 1.5 KΩ must be used.

the optional 16-bit wide Sub-ISA bus.

During system reset, an internal pull-down resistor of 100 KΩ exists on these balls. An external pull-up or pull-down resistor of 1.5 KΩ must be used.

bus and sets bit F0BAR1+I/O Offset 10h[15], LPC ROM Addressing Enable. It enables the SC2200 to boot from a ROM connected to the LPC bus.

During system reset, an internal pull-down resistor of 100 KΩ exists on these balls. An external pull-up or pull-down resistor of 1.5 KΩ must be used.

signals at power-up. Enables using TFT instead of Parallel Port, ACB1, and GPIO17.

During system reset, an internal pull-down resistor of 100 KΩ exists on these balls. An external pull-up or pull-down resistor of 1.5 KΩ must be used.

tion of Fast-PCI monitoring signals. For normal operation, strap this signal low using a 1.5 KΩ resistor. The value of this strap can be read on the MCR[30].

the system-level chip ID.

The value of DID1 can be read in the MCR[29]. The value of DID0 can be read in the MCR[31].

DID0 must have a pull-up resistor of 1.5 KΩ and DID1 must have a pull-down resistor of 1.5 KΩ.

erated from the power supply to indicate that the system should be reset.

SOUT1

SYNC

ROMCS#

PCICLK1

SDATA_OUT

PCICLK0

GNT1#

---

52 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

32580B

3.4.1 System Interface (Continued)

Signal Name Ball No. Type Description Mux

X32I AJ2 I/O Crystal Connections. Connected directly to a 32.768

X32O AJ3 ---

KHz crystal. This clock input is required even if the internal RTC is not being used. Some of the internal clocks

---

are derived from this clock. If an external clock is used, it should be connected to X32I, using a voltage level of 0 volts to V

+10% maximum. X32O should remain

CORE

unconnected.

X27I AG3 I/O Crystal Connections. Connected directly to a

X27O AH2 ---

27.000 MHz crystal. Some of the internal clocks are derived from this clock. If an external clock is used, it

---

should be connected to X27I, using a voltage level of 0 volts to V

and X27O should be remain unconnected.

CLK27M AA4 O 27 MHz Output Clock. Output of crystal oscillator. IDE_DATA5

PCIRST# A6 O PCI and System Reset. PCIRST# is the reset signal for

--the PCI bus and system. It is asserted for approximately 100 µs after POR# is negated.

AMD Geode™ SC2200 Processor Data Book 53

32580B

Signal Definitions

3.4.2 Memory Interface Signals

Signal Name Ball No. Type Description Mux

MD[63:0] See

Table 3-3

I/O Memory Data Bus. The data bus lines driven to/from

system memory.

---

on page

41.

MA[12:0] See

Table 3-3

on page

O Memory Address Bus. The multiplexed row/column

address lines driven to the system memory. Supports 256-Mbit SDRAM.

---

41.

BA1 AK14 O Bank Address Bits. These bits are used to select the

BA0 AJ13 ---

component bank within the SDRAM.

CS1# AH27 O Chip Selects. These bits are used to select the module

CS0# AL12 ---

bank within system memory. Each chip select corresponds to a specific module bank. If CS# is high, the

---

bank(s) do not respond to RAS#, CAS#, and WE# until the bank is selected again.

RASA# AK12 O Row Address Strobe. RAS#, CAS#, WE# and CKE are

--encoded to support the different SDRAM commands. RASA# is used with CS[1:0]#.

CASA# AJ12 O Column Address Strobe. RAS#, CAS#, WE# and CKE

--are encoded to support the different SDRAM commands. CASA# is used with CS[1:0]#.

WEA# AH12 O Write Enable. RAS#, CAS#, WE# and CKE are encoded

--to support the different SDRAM commands. WEA# is used with CS[1:0]#.

DQM7 AB31 O Data Mask Control Bits. During memory read cycles,

DQM6 AG29 ---

DQM5 AK21 ---

DQM4 AL15 ---

DQM3 AC31 ---

DQM2 AG30 ---

these outputs control whether SDRAM output buffers are driven on the MD bus or not. All DQM signals are asserted during read cycles.

During memory write cycles, these outputs control whether or not MD data is written into SDRAM.

DQM[7:0] connect directly to the [DQM7:0] pins of each DIMM connector.

---

DQM1 AH23 ---

DQM0 AL11 ---

CKEA AL22 O Clock Enable. These signals are used to enter Suspend/

--power-down mode. CKEA is used with CS[1:0]#.

If CKE goes low when no read or write cycle is in progress, the SDRAM enters power-down mode. To ensure that SDRAM data remains valid, the self-refresh command is executed. To exit this mode, and return to normal operation, drive CKE high.

These signals should have an external pull-down resistor of 33 KΩ.

SDCLK3 V29 O SDRAM Clocks. SDRAM uses these clocks to sample

SDCLK2 AA28 ---

SDCLK1 W29 ---

SDCLK0 AJ21 ---

all control, address, and data lines. To ensure that the Suspend mode functions correctly, SDCLK3 and SDCLK1 should be used with CS1#. SDCLK2 and SDCLK0 should be used together with CS0#.

---

54 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

32580B

3.4.2 Memory Interface Signals (Continued)

Signal Name Ball No. Type Description Mux

SDCLK_IN AJ27 I SDRAM Clock Input. The SC2200 samples the memory

read data on this clock. Works in conjunction with the SDCLK_OUT signal.

SDCLK_OUT AK28 O SDRAM Clock Output. This output is routed back to

SDCLK_IN. The board designer should vary the length of the board trace to control skew between SDCLK_IN and SDCLK.

3.4.3 Video Port Interface Signals

Signal Name Ball No. Type Description Mux

VPD7 G31 I Video Port Data. The data is input from the CCIR-656

VPD6 H28 ---

VPD5 H29 ---

VPD4 H30 ---

VPD3 H31 ---

VPD2 J28 ---

VPD1 J29 ---

VPD0 J30 ---

VPCKIN F31 I Video Port Clock Input. The clock input from the video

video decoder.

decoder.

---

AMD Geode™ SC2200 Processor Data Book 55

32580B

Signal Definitions

3.4.4 CRT/TFT Interface Signals

Signal Name Ball No. Type Description Mux

DDC_SCL Y1 O DDC Serial Clock. This is the serial clock for the VESA

IDE_DATA10 Display Data Channel interface. It is used for monitor communications. The DDC2B standard is supported by this interface.

DDC_SDA Y2 I/O DDC Serial Data. This is the bidirectional serial data sig-

IDE_DATA9 nal for the VESA Display Data Channel interface. It is used for monitor communications. The DDC2B standard is supported by this interface.

HSYNC A11 O Horizontal Sync ---

VSYNC B11 O Vertical Sync ---

VREF D16 I/O Vo l ta g e R e fe r e nc e . Reference voltage for CRT PLL and

--DAC. This signal reflects the internal voltage reference. If internal voltage reference is used (recommended), leave this ball disconnected. If an external voltage reference is used, this input is tied to a 1.235V reference.

SETRES B15 I Set Resistor. This signal sets the current level for the

--RED/GREEN/BLUE analog outputs. Typically, a 464Ω, 1% resistor is connected between this ball and AV

SSCRT

On-Chip RAMDAC

RED B12 O Analog Red, Green and Blue ---

GREEN A14 ---

BLUE A15 ---

TFT (External DAC) Interface

TFTDCK AA1 O TFT Clock. Clock to external CRT DACs or TFT. IDE_RST#

A10 GPIO17+ IOCS0#

TFTDE P2 O TFT Data Enable. Can be used as blank signal to exter-

B18 ACK#+FPCICLK

nal CRT DACs.

FP_VDD_ON AB1 O TFT Power Control. Used to enable power to the Flat

V30 GXCLK+TEST3

TFTD[17:0] See

Table 3-3

on page

41.

Panel display, with power sequence timing.

O Digital RGB Data to TFT.

TFTD[5:0] - Connect to BLUE TFT inputs. TFTD[11:6] - Connect to GREEN TFT inputs. TFTD[17:12] - Connect to RED TFT inputs.

IDE_CS1#

IDE_DATA4

The TFT interface is

muxed with the IDE interface or the Par-

allel Port. See Table

3-5 on page 46 and

Table 3-6 on page

48 for details.

3.4.5 ACCESS.bus Interface Signals

Signal Name Ball No. Type Description Mux

AB1C N31 I/O ACCESS.bus 1 Serial Clock. This is the serial clock for

the interface.

Note: If selected as AB1C function but not used, tie

AB1C high.

56 AMD Geode™ SC2200 Processor Data Book

GPIO20+DOCCS#

Signal Definitions

32580B

3.4.5 ACCESS.bus Interface Signals (Continued)

Signal Name Ball No. Type Description Mux

AB1D N30 I/O ACCESS.bus 1 Serial Data. This is the bidirectional

serial data signal for the interface.

Note: If AB1D function is selected but not used, tie

AB1D high.

AB2C N29 I/O ACCESS.bus 2 Serial Clock. This is the serial clock for

the interface.

Note: If AB2C function is selected but not used, tie

AB2C high.

AB2D M29 I/O ACCESS.bus 2 Serial Data. This is the bidirectional

serial data signal for the interface.

Note: If AB2D function is selected but not used, tie

AB2D high.

GPIO1+IOCS1#

GPIO12

GPIO13

3.4.6 PCI Bus Interface Signals

Signal Name BalL No. Type Description Mux

PCICLK A7 I PCI Clock. PCICLK provides timing for all transactions

on the PCI bus. All other PCI signals are sampled on the rising edge of PCICLK, and all timing parameters are defined with respect to this edge.

PCICLK0 A4 O PCI Clock Outputs. PCICLK0 and PCICLK1 provide

PCICLK1 D6 O LPC_ROM (Strap)

AD[31:24] See

AD[23:0] A[23:0]

C/BE3# H4 I/O Multiplexed Command and Byte Enables. During the

C/BE2# F3 D10

C/BE1# J2 D9

C/BE0# L1 D8

INTA# D26 I PCI Interrupts. The SC2200 provides inputs for the

INTB# C26 ---

INTC# C9 GPIO19+IOCHRDY

INTD# AA2 IDE_DATA7

Table 3-3

on page

41.

clock drives for the system at 33 MHz. These clocks are asynchronous to PCI signals. There is low skew between all outputs. One of these clock signals should be connected to the PCICLK input. All PCI clock users in the system (including PCICLK) should receive the clock with as low a skew as possible.

I/O Multiplexed Address and Data. A bus transaction con-

sists of an address phase in the cycle in which FRAME# is asserted followed by one or more data phases. During the address phase, AD[31:0] contain a physical 32-bit address. For I/O, this is a byte address. For configuration and memory, it is a DWORD address. During data phases, AD[7:0] contain the least significant byte (LSB) and AD[31:24] contain the most significant byte (MSB).

address phase of a transaction when FRAME# is active, C/BE[3:0]# define the bus command. During the data phase, C/BE[3:0]# are used as byte enables. The byte enables are valid for the entire data phase and determine which byte lanes carry meaningful data. C/BE0# applies to byte 0 (LSB) and C/BE3# applies to byte 3 (MSB).

optional “level-sensitive” PCI interrupts (also known in industry terms as PIRQx#). These interrupts can be mapped to IRQs of the internal 8259A interrupt controllers using PCI Interrupt Steering Registers 1 and 2 (F0 Index 5Ch and 5Dh).

Note: If selected as INTC# or INTD# function(s) but not

used, tie INTC# and INTD# high.

FPCI_MON (Strap)

---

D[7:0]

D11

---

AMD Geode™ SC2200 Processor Data Book 57

32580B

Signal Definitions

3.4.6 PCI Bus Interface Signals (Continued)

Signal Name BalL No. Type Description Mux

PA R J 4 I / O Parity. Parity generation is required by all PCI agents.

The master drives PAR for address- and write-data phases. The target drives PAR for read-data phases. Parity is even across AD[31:0] and C/BE[3:0]#.

For address phases, PAR is stable and valid one PCI clock after the address phase. It has the same timing as AD[31:0] but is delayed by one PCI clock.

For data phases, PAR is stable and valid one PCI clock after either IRDY# is asserted on a write transaction or after TRDY# is asserted on a read transaction.

Once PAR is valid, it remains valid until one PCI clock after the completion of the data phase. (Also see PERR#.)

FRAME# D8 I/O Frame Cycle. Frame is driven by the current master to

indicate the beginning and duration of an access. FRAME# is asserted to indicate the beginning of a bus transaction. While FRAME# is asserted, data transfers continue. FRAME# is de-asserted when the transaction is in the final data phase.

This signal is internally connected to a pull-up resistor.

IRDY# F2 I/O Initiator Ready. IRDY# is asserted to indicate that the

bus master is able to complete the current data phase of the transaction. IRDY# is used in conjunction with TRDY#. A data phase is completed on any PCI clock in which both IRDY# and TRDY# are sampled as asserted. During a write, IRDY# indicates that valid data is present on AD[31:0]. During a read, it indicates that the master is prepared to accept data. Wait cycles are inserted until both IRDY# and TRDY# are asserted together.

This signal is internally connected to a pull-up resistor.

TRDY# F1 I/O Target Ready. TRDY# is asserted to indicate that the tar-

get agent is able to complete the current data phase of the transaction. TRDY# is used in conjunction with IRDY#. A data phase is complete on any PCI clock in which both TRDY# and IRDY# are sampled as asserted. During a read, TRDY# indicates that valid data is present on AD[31:0]. During a write, it indicates that the target is prepared to accept data. Wait cycles are inserted until both IRDY# and TRDY# are asserted together.

This signal is internally connected to a pull-up resistor.

D12

---

D14

D13

58 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

32580B

3.4.6 PCI Bus Interface Signals (Continued)

Signal Name BalL No. Type Description Mux

STOP# G1 I/O Ta r g et S t o p . STOP# is asserted to indicate that the cur-

rent target is requesting that the master stop the current transaction. This signal is used with DEVSEL# to indicate retry, disconnect, or target abort. If STOP# is sampled active by the master, FRAME# is de-asserted and the cycle is stopped within three PCI clock cycles. As an input, STOP# can be asserted in the following cases:

1) If a PCI master tries to access memory that has

been locked by another master. This condition is detected if FRAME# and LOCK# are asserted during an address phase.

2) If the PCI write buffers are full or if a previously buff-

ered cycle has not completed.

3) On read cycles that cross cache line boundaries.

This is conditional based upon the programming of GX1 module’s PCI Configuration Register, Index 41h[1].

This signal is internally connected to a pull-up resistor.

LOCK# H3 I/O Lock Operation. LOCK# indicates an atomic operation

that may require multiple transactions to complete. When LOCK# is asserted, non-exclusive transactions may proceed to an address that is not currently locked (at least 16 bytes must be locked). A grant to start a transaction on PCI does not guarantee control of LOCK#. Control of LOCK# is obtained under its own protocol in conjunction with GNT#.

It is possible for different agents to use PCI while a single master retains ownership of LOCK#. The arbiter can implement a complete system lock. In this mode, if LOCK# is active, no other master can gain access to the system until the LOCK# is de-asserted.

This signal is internally connected to a pull-up resistor.

DEVSEL# E4 I/O Device Select. DEVSEL# indicates that the driving

device has decoded its address as the target of the current access. As an input, DEVSEL# indicates whether any device on the bus has been selected. DEVSEL# is also driven by any agent that has the ability to accept cycles on a subtractive decode basis. As a master, if no DEVSEL# is detected within and up to the subtractive decode clock, a master abort cycle is initiated (except for special cycles which do not expect a DEVSEL# returned).

This signal is internally connected to a pull-up resistor.

D15

---

BHE#

AMD Geode™ SC2200 Processor Data Book 59

32580B

Signal Definitions

3.4.6 PCI Bus Interface Signals (Continued)

Signal Name BalL No. Type Description Mux

PERR# H2 I/O Parity Error. PERR# is used for reporting data parity

--errors during all PCI transactions except a Special Cycle. The PERR# line is driven two PCI clocks after the data in which the error was detected. This is one PCI clock after the PAR that is attached to the data. The minimum duration of PERR# is one PCI clock for each data phase in which a data parity error is detected. PERR# must be driven high for one PCI clock before being placed in TRISTATE. A target asserts PERR# on write cycles if it has claimed the cycle with DEVSEL#. The master asserts PERR# on read cycles.

This signal is internally connected to a pull-up resistor.

SERR# H1 I/O System Error. SERR# can be asserted by any agent for

--reporting errors other than PCI parity. When the PFS bit is enabled in the GX1 module’s PCI Control Function 2 register (Index 41h[5]), SERR# is asserted upon assertion of PERR#.

This signal is internally connected to a pull-up resistor.

REQ1# A5 I Request Lines. REQ[1:0]# indicate to the arbiter that an

REQ0# B5 ---

agent requires the bus. Each master has its own REQ# line. REQ# priorities (in order) are:

---

1) VIP

2) IDE Channel 0

3) IDE Channel 1

4) Audio

5) USB

6) External REQ0#

7) External REQ1#

Each REQ# is internally connected to a pull-up resistor.

GNT1# C6 O Grant Lines. GNT[1:0]# indicate to the requesting mas-

GNT0# C5 DID0 (Strap)

ter that it has been granted access to the bus. Each master has its own GNT# line. GNT# can be retracted at any

DID1 (Strap)

time a higher REQ# is received or if the master does not begin a cycle within a minimum period of time (16 PCI clocks).

Each of these signals is internally connected to a pull-up resistor.

GNT0# must have a pull-up resistor of 1.5 KΩ and GNT1# must have a pull-down resistor of 1.5 KΩ.

60 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

32580B

3.4.7 Sub-ISA Interface Signals

Signal Name Ball No. Type Description Mux

A[23:0] See

O Address Lines AD[23:0]

Table 3-3

on page

41.

D15 See

D14 IRDY#

D13 TRDY#

Table 3-3

on page

41.

I/O Data Bus STOP#

D12 PA R

D11 C/BE3#

D10 C/BE2#

D9 C/BE1#

D8 C/BE0#

D[7:0] AD[31:24]

BHE# E4 O Byte High Enable. With A0, defines byte accessed for

DEVSEL#

16 bit wide bus cycles.

IOCS1# D10 O I/O Chip Selects GPIO1+TFTD12

N30 AB1D+GPIO1

IOCS0# A10 GPIO17+TFTDCK

ROMCS# C8 O ROM or Flash ROM Chip Select BOOT16 (Strap)

DOCCS# A9 O DiskOnChip or NAND Flash Chip Select GPIO20+TFTD0

N31 AB1C+GPIO20

TRDE# D11 O Transceiver Data Enable Control. Active low for Sub-

GPIO0

ISA data transfers. The signal timing is as follows:

• In a read cycle, TRDE# has the same timing as RD#.

• In a write cycle, TRDE# is asserted (to active low) at

the time WR# is asserted. It continues being asserted for one PCI clock cycle after WR# has been negated, then it is negated.

RD# B8 O Memory or I/O Read. Active on any read cycle. CLKSEL0 (Strap)

WR# B9 O Memory or I/O Write. Active on any write cycle. ---

IOR# D9 O I/O Read. Active on any I/O read cycle. DOCR#+GPIO14

IOW# A8 O I/O Write. Active on any I/O write cycle. DOCW#+GPIO15

DOCR# D9 O DiskOnChip or NAND Flash Read. Active on any mem-

IOR#+GPIO14

ory read cycle to DiskOnChip.

DOCW# A8 O DiskOnChip or NAND Flash Write. Active on any mem-

IOW#+GPIO15

ory write cycle to DiskOnChip.

IRQ9 AA3 I Interrupt 9 Request Input. Active high.

IDE_DATA6

Note: If IRQ9 function is selected but not used, tie

IRQ9 low.

IOCHRDY C9 I I/O Channel Ready

GPIO19+INTC#

Note: If IOCHRDY function is selected but not used, tie

IOCHRDY high.

AMD Geode™ SC2200 Processor Data Book 61

32580B

Signal Definitions

3.4.8 Low Pin Count (LPC) Bus Interface Signals

Signal Name Ball No. Type Description Mux

LAD3 L29 I/O LPC Address-Data. Multiplexed command, address,

LAD2 L30 GPIO34

bidirectional data, and cycle status.

GPIO35

LAD1 L31 GPIO33

LAD0 M28 GPIO32

LDRQ# L28 I LPC DMA Request. Encoded DMA request for LPC

GPIO36

interface.

Note: If LDRQ# function is selected but not used, tie

LDRQ# high.

LFRAME# K31 O LPC Frame. A low pulse indicates the beginning of a

GPIO37

new LPC cycle or termination of a broken cycle.

LPCPD# K28 O LPC Power-Down. Signals the LPC device to prepare for

GPIO38/IRRX2

power shut-down on the LPC interface.

SERIRQ J31 I/O Serial IRQ. The interrupt requests are serialized over a

GPIO39 single signal, where each IRQ level is delivered during a designated time slot.

Note: If SERIRQ function is selected but not used, tie

SERIRQ high.

62 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

32580B

3.4.9 IDE Interface Signals

Signal Name Ball No. Type Description Mux

IDE_RST# AA1 O IDE Reset. This signal resets all the devices that are

TFTDCK

attached to the IDE interface.

IDE_ADDR2 U2 O IDE Address Bits. These address bits are used to

IDE_ADDR1 AE1 TFTD2

access a register or data port in a device on the IDE bus.

TFTD4

IDE_ADDR0 AD3 TFTD3

IDE_DATA[15:0] See

Table 3-3

on page

41.

I/O IDE Data Lines. IDE_DATA[15:0] transfers data to/from

the IDE devices.

The IDE interface is

muxed with the TFT

interface. See Table

3-5 on page 46 for

details.

IDE_IOR0# Y4 O IDE I/O Read Channels 0 and 1. IDE_IOR0# is the read

IDE_IOR1# D28 O GPIO6+DTR2#/

signal for Channel 0 and IDE_IOR1# is the read signal for Channel 1. Each signal is asserted at read accesses to the corresponding IDE port addresses.

IDE_IOW0# AD2 O IDE I/O Write Channels 0 and 1. IDE_IOW0# is the

IDE_IOW1# C28 O GPIO9+DCD2#+

write signal for Channel 0. IDE_IOW1# is the write signal for Channel 1. Each signal is asserted at write accesses to corresponding IDE port addresses.

IDE_CS0# AF2 O IDE Chip Selects 0 and 1. These signals are used to

IDE_CS1# P2 O TFTDE

select the command block registers in an IDE device.

IDE_IORDY0 AD1 I I/O Ready Channels 0 and 1. When de-asserted, these

IDE_IORDY1 B29 I GPIO10+DSR2#+

signals extend the transfer cycle of any host register access if the required device is not ready to respond to the data transfer request.

TFTD10

BOUT2+SDTEST5

TFTD9

SDTEST2

TFTD5

TFTD11

SDTEST1

Note: If selected as IDE_IORDY0 or IDE_IORDY1

function(s) but not used, then signal(s) should be tied high.

IDE_DREQ0 AC4 I DMA Request Channels 0 and 1. The IDE_DREQ sig-

IDE_DREQ1 C31 I GPIO8+CTS2#

nals are used to request a DMA transfer from the SC2200. The direction of transfer is determined by the IDE_IOR/IOW signals.

TFTD8

+SDTEST4

Note: If selected as IDE_DREQ0/ IDE_DREQ1 func-

tion but not used, tie IDE_DREQ0/IDE_DREQ1 low.

IDE_DACK0# AD4 O DMA Acknowledge Channels 0 and 1. The

IDE_DACK1# C30 O GPIO7+RTS2#

IDE_DACK# signals acknowledge the DREQ request to initiate DMA transfers.

IRQ14 AF1 I Interrupt Request Channels 0 and 1. These input sig-

IRQ15 AJ8 I GPIO11+RI2#

nals are edge-sensitive interrupts that indicate when the IDE device is requesting a CPU interrupt service.

TFTD0

+SDTEST0

TFTD1

Note: If selected as IRQ14/IRQ15 function but not

used, tie IRQ14/IRQ15 low.

AMD Geode™ SC2200 Processor Data Book 63

32580B

Signal Definitions

3.4.10 Universal Serial Bus (USB) Interface Signals

Signal Name Ball No. Type Description Mux

POWER_EN AH1 O Power Enable. This signal enables the power to a self-

---

powered USB hub.

OVER_CUR# AF4 I Overcurrent. This signal indicates that the USB hub has

---

detected an overcurrent on the USB.

DPOS_PORT1 A28 I/O

DNEG_PORT1 A29 I/O

DPOS_PORT2 B27 I/O

DNEG_PORT2 B28 I/O

DPOS_PORT3 A26 I/O

DNEG_PORT3 A27 I/O

USB Port 1 Data Positive for Port 1.

USB Port 1 Data Negative for Port 1.

USB Port 2 Data Positive for Port 2.

USB Port 2 Data Negative for Port 2.

USB Port 3 Data Positive for Port 3.

USB Port 3 Data Negative for Port 3.

---

1. A 15K ohm pull-down resistor is required on all ports (even if unused).

3.4.11 Serial Ports (UARTs) Interface Signals

Signal Name Ball No. Type Description Mux

SIN1 AG2 I Serial Inputs. Receive composite serial data from the

SIN2 E28 SDTEST3

SIN3 AK8 IRRX1

communications link (peripheral device, modem or other data transfer device).

Note: If selected as SIN2 or SIN3 function(s) but not

used, then signal(s) should be tied high.

SOUT1 AF3 O Serial Outputs. Send composite serial data to the com-

SOUT2 D29 CLKSEL2 (Strap)

SOUT3 C11 IRTX

munications link (peripheral device, modem or other data transfer device). These signals are set active high after a system reset.

CLKSEL1 (Strap)

RTS2# C30 O Request to Send. When low, indicates to the modem or

other data transfer device that the corresponding UART is ready to exchange data. A system reset sets these signals to inactive high, and loopback operation holds them inactive.

CTS2# C31 I Clear to Send. When low, indicates that the modem or

other data transfer device is ready to exchange data.

Note: If selected as CTS2# function but not used, tie

CTS2# low.

DTR1#/BOUT1 AG1 O Data Terminal Ready Outputs. When low, indicate to

DTR2#/BOUT2 D28 GPIO6+IDE_IOR1#

the modem or other data transfer device that the UART is ready to establish a communications link. After a system reset, these balls provide the DTR# function and set these signals to inactive high. Loopback operation drive them inactive.

Baud Outputs. Provide the associated serial channel baud rate generator output signal if test mode is selected (i.e., bit 7 of the EXCR1 Register is set).

---

GPIO7+

IDE_DACK1#

GPIO8+

IDE_DREQ1

GPIO18

64 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

32580B

3.4.11 Serial Ports (UARTs) Interface Signals (Continued)

Signal Name Ball No. Type Description Mux

RI2# AJ8 I Ring Indicator. When low, indicates to the modem that a

telephone ring signal has been received by the modem. They are monitored during power-off for wakeup event detection.

Note: If selected as RI2# function but not used, tie

RI2# high.

DCD2# C28 I Data Carrier Detected. When low, indicates that the

data transfer device (e.g., modem) is ready to establish a communications link.

Note: If selected as DCD2# function but not used, tie

DCD2# high.

DSR2# B29 I Data Set Ready. When low, indicates that the data trans-

fer device (e.g., modem) is ready to establish a communications link.

Note: If selected as DSR2# function but not used, tie

DSR2# low.

GPIO11+IRQ15

GPIO9+IDE_IOW1#

+SDTEST2

GPIO10+

IDE_IORDY1

AMD Geode™ SC2200 Processor Data Book 65

32580B

Signal Definitions

3.4.12 Parallel Port Interface Signals

Signal Name Ball No. Type Description Mux

ACK# B18 I Acknowledge. Pulsed low by the printer to indicate that it

TFTDE+FPCICLK

has received data from the Parallel Port.

AFD#/DSTRB# D22 O Automatic Feed. When low, instructs the printer to auto-

TFTD2+INTR_O matically feed a line after printing each line. This signal is in TRI-STATE after a 0 is loaded into the corresponding control register bit. An external 4.7 KΩ pull-up resistor should be attached to this ball.

Data Strobe (EPP). Active low, used in EPP mode to denote a data cycle. When the cycle is aborted, DSTRB# becomes inactive (high).

BUSY/WAIT# B17 I Busy. Set high by the printer when it cannot accept

TFTD3+F_C/BE1#

another character.

Wait. In EPP mode, the Parallel Port device uses this active low signal to extend its access cycle.

ERR# D21 I Error. Set active low by the printer when it detects an

TFTD4+F_C/BE0#

error.

INIT# B21 O Initialize. When low, initializes the printer. This signal is

TFTD5+SMI_O

in TRI-STATE after a 1 is loaded into the corresponding control register bit. Use an external 4.7 KΩ pull-up resistor.

PD7 A18 I/O Parallel Port Data. Transfer data to and from the periph-

PD6 A20 TFTD1+F_AD6

eral data bus and the appropriate Parallel Port data register. These signals have a high current drive capability.

TFTD13+F_AD7

PD5 C19 TFTD11+F_AD5

PD4 C18 TFTD10+F_AD4

PD3 C20 TFTD9+F_AD3

PD2 D20 TFTD8+F_AD2

PD1 A21 TFTD7+F_AD1

PD0 C21 TFTD6+F_AD0

PE D17 I Paper End. Set high by the printer when it is out of

TFTD14+F_C/BE2#

paper.

This ball has an internal weak pull-up or pull-down resistor that is programmed by software.

SLCT C17 I Select. Set active high by the printer when the printer is

TFTD15+F_C/BE3#

selected.

SLIN#/ASTRB# B20 O Select Input. When low, selects the printer. This signal

is in TRI-STATE after a 0 is loaded into the corresponding

TFTD16+

F_IRDY#

control register bit. Uses an external 4.7 KΩ pull-up resistor.

Address Strobe (EPP). Active low, used in EPP mode to denote an address or data cycle. When the cycle is aborted, ASTRB# becomes inactive (high).

66 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

32580B

3.4.12 Parallel Port Interface Signals (Continued)

Signal Name Ball No. Type Description Mux

STB#/WRITE# A22 O Data Strobe. When low, indicates to the printer that valid

data is available at the printer port. This signal is in TRI-

TFTD17+

F_FRAME#

STATE after a 0 is loaded into the corresponding control register bit. An external 4.7 KΩ pull-up resistor should be employed.

Write Strobe. Active low, used in EPP mode to denote an address or data cycle. When the cycle is aborted, WRITE# becomes inactive (high).

3.4.13 Fast Infrared (IR) Port Interface Signals

Signal Name Ball No. Type Description Mux

IRRX1 AK8 I IR Receive. Primary input to receive serial data from the

IR transceiver. Monitored during power-off for wakeup event detection.

Note: If selected as IRRX1 function but not used, tie

IRRX1 high.

IRRX2/GPIO38 K28 I IR Receive 2. Auxiliary IR receiver input to support a

second transceiver. This input signal can be used when GPIO38 is selected using PMR[14], and when AUX_IRRX bit in register IRCR2 of the IR module in internal SuperI/O is set.

IRTX C11 O IR Transmit. IR serial output data. SOUT3

SIN3

LPCPD#

AMD Geode™ SC2200 Processor Data Book 67

32580B

Signal Definitions

3.4.14 AC97 Audio Interface Signals

Signal Name Ball No. Type Description Mux

BIT_CLK U30 I Audio Bit Clock. The serial bit clock from the codec.

F_TRDY#

Note: If selected as BIT_CLK function but not used, tie

BIT_CLK low.

SDATA_OUT P29 O Serial Data Output. This output transmits audio serial

TFT_PRSNT (Strap)

data to the codec.

SDATA_IN U31 I Serial Data Input. This input receives serial data from

F_GNT0#

the primary codec.

Note: If selected as SDATA_IN function but not used,

tie SDATA_IN low.

SDATA_IN2 AL8 I Serial Data Input 2. This input receives serial data from

---

the secondary codec. This signal has wakeup capability.

SYNC P30 O Serial Bus Synchronization. This bit is asserted to syn-

CLKSEL3 (Strap) chronize the transfer of data between the SC2200 and the AC97 codec.

AC97_CLK P31 O Codec Clock. It is twice the frequency of the Audio Bit

---

Clock.

AC97_RST# U29 O Codec Reset. S3 to S5 wakeup is not supported

because AC97_RST# is powered by V

. If wakeup from

F_STOP#

states S3 to S5 are needed, a circuit in the system board should be used to reset the AC97 codec.

PC_BEEP V31 O PC Beep. Legacy PC/AT speaker output. GPIO16+

F_DEVSEL#

3.4.15 Power Management Interface Signals

Signal Name Ball No. Type Description Mux

CLK32 AH8 O 32.768 KHz Output Clock ---

GPWIO0 AH6 I/O General Purpose Wakeup I/Os. These signals each

GPWIO1 AK5 ---

GPWIO2 AJ6 ---

LED# AL4 O LED Control. Drives an externally connected LED (on,

ONCTL# AJ5 O On / Off Control. This signal indicates to the main power

have an internal pull-up of 100 KΩ.

off or a 1 Hz blink). Sleeping / Working indicator. This signal is an open-drain output.

supply that power should be turned on. This signal is an open-drain output.

---

68 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

32580B

3.4.15 Power Management Interface Signals (Continued)

Signal Name Ball No. Type Description Mux

PWRBTN# AH5 I Power Button. Input used by the power management

--logic to monitor external system events, most typically a system on/off button or switch.

The signal has an internal pull-up of 100 KΩ, a Schmitt- trigger input buffer and debounce protection of at least 16 ms.

ACPI is non-functional and all ACPI outputs are undefined when the power-up sequence does not include using the power button. SUSP# is an internal signal generated from the ACPI block. Without an ACPI reset, SUSP# can be permanently asserted. If the USE_SUSP bit in CCR2 of GX1 module is enabled (Index C2h[7] = 1), the CPU will stop.

If ACPI functionality is desired, or the situation described above avoided, the power button must be toggled. This can be done externally or internally. GPIO63 is internally connected to PWRBTN#. To toggle the power button with software, GPIO63 must be programmed as an output using the normal GPIO programming protocol (see Section 6.4.1.1 "GPIO Support Registers" on page 233). GPIO63 must be pulsed low for at least 16 ms and not more than 4 sec.

Asserting POR# has no effect on ACPI. If POR# is asserted and ACPI was active prior to POR#, then ACPI will remain active after POR#. Therefore, BIOS must ensure that ACPI is inactive before GPIO63 is pulsed low.

PWRCNT1 AK6 O Suspend Power Plane Control 1 and 2. Control signal

PWRCNT2 AL7 O ---

asserted during power management Suspend states. These signals are open-drain outputs.

THRM# AK4 I Thermal Event. Active low signal generated by external

---

--hardware indicating that the system temperature is too high.

AMD Geode™ SC2200 Processor Data Book 69

32580B

Signal Definitions

3.4.16 GPIO Interface Signals

Signal Name Ball No. Type Description Mux

GPIO0 D11 I/O GPIO Port 0. Each signal is configured independently as

GPIO1 D10 IOCS1#+TFTD12

N30 AB1D+IOCS1#

GPIO6 D28 DTR2#/BOUT2+

an input or I/O, with or without static pull-up, and with either open-drain or totem-pole output type.

A debouncer and an interrupt can be enabled or masked for each of signals GPIO[00:01] and [06:15] independently.

Note: GPIO12, GPIO13, GPIO16 inputs: If GPIOx func-

GPIO7 C30 RTS2#+IDE_DACK1#

tion is selected but not used, tie GPIOx low.

TRDE#

IDE_IOR1#+

SDTEST5

+SDTEST0

GPIO8 C31 CTS2#+IDE_DREQ1

+SDTEST4

GPIO9 C28 DCD2#+IDE_IOW1#+

SDTEST2

GPIO10 B29 DSR2#+IDE_IORDY1

+SDTEST1

GPIO11 AJ8 RI2#+IRQ15

GPIO12 N29 AB2C

GPIO13 M29 AB2D

GPIO14 D9 IOR#+DOCR#

GPIO15 A8 IOW#+DOCW#

GPIO16 V31 PC_BEEP+

F_DEVSEL#

GPIO17 A10 IOCS0#+TFTDCK

GPIO18 AG1 DTR1#/BOUT1

GPIO19 C9 INTC#+IOCHRDY

GPIO20 A9 DOCCS#+TFTD0

N31 AB1C+DOCCS#

GPIO32 M28 I/O GPIO Port 1. Each signal is configured independently as

GPIO33 L31 LAD1

GPIO34 L30 LAD2

GPIO35 L29 LAD3

an input or I/O, with or without static pull-up, and with either open-drain or totem-pole output type.

A debouncer and an interrupt can be enabled or masked for each of signals GPIO[32:41] independently.

LAD0

GPIO36 L28 LDRQ#

GPIO37 K31 LFRAME#

GPIO38/IRRX2 K28 LPCPD#

GPIO39 J31 SERIRQ

GPIO40 Y3 IDE_DATA8

GPIO41 W4 IDE_DATA11

70 AMD Geode™ SC2200 Processor Data Book

Signal Definitions

32580B

3.4.17 Debug Monitoring Interface Signals

Signal Name Ball No. Type Description Mux

FPCICLK B18 O Fast-PCI Bus Monitoring Signals. When enabled, this

F_AD7 A18 O PD7+TFTD13

F_AD6 A20 O PD6+TFTD1

group of signals provides for monitoring of the internal Fast-PCI bus for debug purposes. To enable, pull up FPCI_MON (ball A4).

ACK#+TFTDE

F_AD5 C19 O PD5+TFTD11

F_AD4 C18 O PD4+TFTD10

F_AD3 C20 O PD3+TFTD9

F_AD2 D20 O PD2+TFTD8

F_AD1 A21 O PD1+TFTD7

F_AD0 C21 O PD0+TFTD6

F_C/BE3# C17 O SLCT+TFTD15

F_C/BE2# D17 O PE+TFTD14

F_C/BE1# B17 O BUSY/WAIT#+

TFTD3

F_C/BE0# D21 O ERR#+TFTD4+

F_FRAME# A22 O STB#/WRITE#+

TFTD17

F_IRDY# B20 O SLIN#/ASTRB#+

TFTD16

F_STOP# U29 O AC97_RST#

F_DEVSEL# V31 O GPIO16+

PC_BEEP

F_GNT0# U31 O SDATA_IN

F_TRDY# U30 O BIT_CLK

INTR_O D22 O CPU Core Interrupt. When enabled, this signal provides

for monitoring of the internal GX1 core INTR signal for

AFD#/DSTRB#+

TFTD2

debug purposes. To enable, pull up FPCI_MON (ball A4).

SMI_O B21 O System Management Interrupt. This is the input to the

INIT#+TFTD5+ GX1 core. When enabled, this signal provides for monitoring of the internal GX1 core SMI# signal for debug purposes. To enable, pull up FPCI_MON (ball A4).

3.4.18 JTAG Interface Signals

Signal Name Ball No. Type Description Mux

TCK E31 I JTAG Test Clock. This signal has an internal weak pull-

up resistor.

TDI F29 I JTAG Test Data Input. This signal has an internal weak

pull-up resistor.

TDO E30 O JTAG Test Data Output ---

TMS F28 I JTAG Test Mode Select. This signal has an internal

weak pull-up resistor.

AMD Geode™ SC2200 Processor Data Book 71

---

32580B

Signal Definitions

3.4.18 JTAG Interface Signals (Continued)

Signal Name Ball No. Type Description Mux

TRST# E29 I JTAG Test Reset. This signal has an internal weak pull-

---

up resistor.

For normal JTAG operation, this signal should be active at power-up.

If the JTAG interface is not being used, this signal can be tied low.

3.4.19 Test and Measurement Interface Signals

Signal Name Ball No. Type Description Mux

GXCLK V30 O GX Clock. This signal is for internal testing only. For nor-

mal operation either program as FP_VDD_ON or leave unconnected.

TEST3 V30 O Internal Test Signals. These signals are used for inter-

nal testing only. For normal operation, leave unconnected unless programmed as FP_VDD_ON.

TEST2 AJ1 O Internal Test Signals. These signals are used for inter-

TEST1 AG4 O PLL6B

nal testing only. For normal operation, leave unconnected

TEST0 AH3 O PLL2B

GTEST F30 I Global Test. This signal is used for internal testing only.

For normal operation this signal should be pulled down with 1.5 KΩ.

PLL6B AG4 I/O PLL6, PLL5 and PLL2 Bypass. These signals are used

PLL5B AJ1 I/O TEST2

for internal testing only. For normal operation leave unconnected.

PLL2B AH3 I/O TEST0

SDTEST5 D28 O Memory Internal Test Signals. These signals are used

for internal testing only. For normal operation, these signals should be programmed as one of their muxed

SDTEST4 C31 O GPIO8+CTS2#+

options.

SDTEST3 E28 O SIN2

SDTEST2 C28 O GPIO9+DCD2#+

SDTEST1 B29 O GPIO10+DSR2#+ID

SDTEST0 C30 O GPIO7+RTS2#+

TDP D30 I/O Thermal Diode Positive / Negative. These signals are

TDN D31 I/O ---

for internal testing only. For normal operation leave unconnected.

FP_VDD_ON+

TEST3

FP_VDD_ON+

GXCLK

PLL5B

---

TEST1

GPIO6+

DTR2#/BOUT2+

IDE_IOR1#

IDE_DREQ1

IDE_IOW1#

E_IORDY1

IDE_DACK1#

---

3.4.20 Power, Ground and No Connections1

Signal Name Ball No. Type Description

SSPLL2

72 AMD Geode™ SC2200 Processor Data Book

C16 GND PLL2 Analog Ground Connection.

Signal Definitions

3.4.20 Power, Ground and No Connections1 (Continued)

Signal Name Ball No. Type Description

32580B

PLL2

PLL3

CCCRT

SSCRT

BAT

SBL

CORE

SSPLL3

CCUSB

SSUSB

CCCRT

SSCRT

AK3 GND PLL3 Analog Ground Connection.

A17 PWR 3.3V PLL2 Analog Power Connection. Low noise power for PLL2 and

AJ4 PWR 3.3V PLL3 Analog Power Connection. Low noise power for PLL3,

D27 PWR 3.3V Analog USB Power Connection. Low noise power.

C27 GND Analog USB Ground Connection.

A12, C13, D15 PWR 3.3V Analog CRT DAC Power Connections. Low noise power.

B14, C14, C15 GND Analog CRT DAC Ground Connections. Return

D12 PWR 1.8V / 2.1V CRT DAC Digital Power Connection. Can be directly con-

C12 GND CRT DAC Digital Ground Connection. Can be directly connected to VSS

AL3 PWR Battery. Provides battery back-up to the RTC and ACPI registers, when

AL5 PWR 3.3V Standby Power Supply. Provides power to the Real-Time Clock

AL6 PWR 1.8V / 2.1V Standby Power Supply. Provides power to the internal logic

See Table 3-3

on page 41. (Total of 28)

See Table 3-3

on page 41. (Total of 43)

See Table 3-3

on page 41. (Total of 92)

NC See Table 3-3

on page 41.

(Total of 8)

1. All power sources except V

BAT

PLL5.

PLL4, and PLL6.

current.

nected to V

on PCB (printed circuit board).

CORE

on PCB.

is lower than the minimum value (see Table 9-3 on page 370). The

ball is connected to the internal logic through a series resistor for UL protection. If battery backup is not desired, connect V

BAT

to V

(RTC) and ACPI circuitry while the main power supply is turned off.

while the main power supply is turned off. This signal requires a 0.1 μF bypass capacitor to V

. This supply must be present when VSB is

present.

PWR 1.8V / 2.1V Core Processor Power Connections.

PWR 3.3V I/O Power Connections.

GND Ground Connections.

--- No Connections. These lines should be left disconnected. Connecting a pull-up/-down resistor or to an active signal could cause unexpected results and possible malfunctions.

must be connected, even if the function is not used.

AMD Geode™ SC2200 Processor Data Book 73

32580B

Signal Definitions

74 AMD Geode™ SC2200 Processor Data Book

General Configuration Block 32580B

4.0General Configuration Block

The General Configuration block includes registers for:

• Pin Multiplexing and Miscellaneous Configuration

• WATCHDOG Timer

• High-Resolution Timer

• Clock Generators

A selectable interrupt is shared by all these functions.

4.1 Configuration Block Addresses

Registers of the General Configuration block are I/O mapped in a 64-byte address range. These registers are physically connected to the internal Fast-PCI bus, but do

Table 4-1. General Configuration Block Register Summary

Offset

00h-01h 16 R/W WDTO. WATCHDOG Timeout 0000h Page 84

02h-03h 16 R/W WDCNFG. WATCHDOG Configuration 0000h Page 84

04h 8 R/WC WDSTS. WATCHDOG Status 00h Page 84

05h-07h --- --- RSVD. Reserved --- ---

08h-0Bh 32 RO TMVALUE. TIMER Value xxxxxxxxh Page 86

0Ch 8 R/W TMSTS. TIMER Status 00h Page 86

0Dh 8 R/W TMCNFG. TIMER Configuration 00h Page 86

0Eh-0Fh --- --- RSVD. Reserved --- ---

10h 8 RO MCCM. Maximum Core Clock Multiplier Strapped Value Page 92

11h --- --- RSVD. Reserved --- ---

12h 8 R/W PPCR. PLL Power Control 2Fh Page 92

13h-17h --- --- RSVD. Reserved --- ---

18h-1Bh 32 R/W PLL3C. PLL3 Configuration E1040005h Page 92

1Ch-1Dh --- --- RSVD. Reserved --- ---

1Eh-1Fh 16 R/W CCFC. Core Clock Frequency Control Strapped Value Page 92

20h-2Fh --- --- RSVD. Reserved --- ---

30h-33h 32 R/W PMR. Pin Multiplexing Register 00000000h Page 76

34h-37h 32 R/W MCR. Miscellaneous Configuration Register 00000001h Page 80

38h 8 R/W INTSEL. Interrupt Selection 00h Page 82

39h-3Bh --- --- RSVD. Reserved --- ---

3Ch 8 RO ID. Device ID xxh Page 82

3Dh 8 RO REV. Revision xxh Page 82

3Eh-3Fh 16 RO CBA. Configuration Base Address xxxxh Page 82

Width

(Bits) Type Name Reset Value Reference

not have a register block in PCI configuration space (i.e., they do not appear to software as PCI registers).

After system reset, the Base Address register is located at I/O address 02EAh. This address can be used only once. Before accessing any PCI registers, the BOOT code must program this 16-bit register to the I/O base address for the General Configuration block registers. All subsequent writes to this address, are ignored until system reset.

Note: Location of the General Configuration Block can-

not be determined by software. See the AMD

Geode™ SC2200 Processor Specification Update

document.

Reserved bits in the General Configuration block should be read as written unless otherwise specified.

AMD Geode™ SC2200 Processor Data Book 75

32580B

General Configuration Block

4.2 Multiplexing, Interrupt Selection, and Base Address Registers

The registers described inTable 4-2 are used to determine general configuration for the SC2200. These registers also indicate which multiplexed signals are issued via balls from

Table 4-2. Multiplexing, Interrupt Selection, and Base Address Registers

Bit Description

Offset 30h-33h Pin Multiplexing Register - PMR (R/W) Reset Value: 00000000h

This register configures pins with multiple functions. See Section 3.1 on page 27 for more information about multiplexing information.

31:30 Reserved: Always write 0.

29 Test Signals. Selects ball functions.

Ball # 0: Internal Test Signals 1: Internal Test Signals

Name Add’l Dependencies Name Add’l Dependencies

D28 / AH3 PLL2B None TEST0 None

C28 / AG4 PLL6B None TEST1 None

B29 / AJ1 PLL5B None TEST2 None

AL16 / V30 GXCLK See PMR[23] TEST3 PMR[23] = 0

28 Test Signals. Selects ball function.

Ball # 0: AC97 Signal 1: Internal Test Signal

Name Add’l Dependencies Name Add’l Dependencies

AJ4 / E28 SIN2 None SDTEST3 See Note.

Note: If this bit is set, PMR[8] and PMR[18] must be set by software.

27 FPCI_MON (Fast-PCI Monitoring). Selects Fast-PCI monitoring output signals instead of Parallel Port signals.

Fast-PCI monitoring output signals can be enabled in two ways: by setting this bit to 1 or by strapping FPCI_MON (ball A4) high. (The strapped value can be read back at MCR[30].) Listed below is how these two options work together and the signals that are enabled (enabling overrides add’l dependencies except FPCI_MON = 1). Note that the FPCI monitoring signals that are muxed with Audio signals are not enabled via this bit. They are only enabled using the strap option.

PMR[27] FPCI_MON

0 0 Disable all Fast-PCI monitoring signals 0 1 Enable all Fast-PCI monitoring signals 1 0 Enable Fast-PCI monitoring signals muxed with Parallel Port signals only 1 1 Enable all Fast-PCI monitoring signals

Ball #

FPCI_MON Other Signal Add’l Dependencies

U3 / B18 FPCICLK ACK#+TFTDE See PMR[23] U1 / A18 F_AD7 PD7+TFTD13 See PMR[23] V3 / A20 F_AD6 PD6+TFTD1 See PMR[23] V2 / C19 F_AD5 PD5+TFT11 See PMR[23] V1 / C18 F_AD4 PD4+TFTD10 See PMR[23] W2 / C20 F_AD3 PD3+TFTD9 See PMR[23] W3 / D20 F_AD2 PD2+TFTD8 See PMR[23] Y1 / A21 F_AD1 PD1+TFTD7 See PMR[23] AA1 / C21 F_AD0 PD0_TFTD5 See PMR[23] T4 / C17 F_C/BE3# SLCT+TFTD15 See PMR[23] T3 / D17 F_C/BE2# PE+TFTD14 See PMR[23] T1 / B17 F_C/BE1# BUSY/WAIT#+TFTD3 See PMR[23] AA3 / D21 F_C/BE0# ERR#+TFTD4 See PMR[23] AB1 / A22 F_FRAME# STB#/WRITE#+TFTD7 See PMR[23] W1 / B20 F_IRDY# SLIN#/ASTRB#+TFTD16 See PMR[23] AB2 / D22 INTR_O AFD#/DSTRB#+TFTD2 See PMR[23] Y3 / B21 SMI_O INIT#+TFTD5 See PMR[23]

AL15 / V31 F_DEVSEL# GPIO16+PC_BEEP FPCI_MON = 1 and see PMR[0] AJ15 / U29 F_STOP# AC97_RST# FPCI_MON = 1 AK14 / U31 F_GNT0# SDATA_IN FPCI_MON = 1 AL14 / U30 F_TRDY# BIT_CLK FPCI_MON = 1

26 Note: Reserved: Always write 0.

which more than one signal may be output. For more information about multiplexed signals and the appropriate configurations, see Section 3.1 "Ball Assignments" on page 27.

76 AMD Geode™ SC2200 Processor Data Book

General Configuration Block

32580B

Table 4-2. Multiplexing, Interrupt Selection, and Base Address Registers (Continued)

Bit Description

25 AC97CKEN (Enable AC97_CLK Output). This bit enables the output drive of AC97_CLK (ball P31).

0: AC97_CLK output is HIZ. 1: AC97_CLK output is enabled.

24 TFTIDE (TFT/IDE). Determines whether certain balls are used for TFT signals or for IDE signals. Note that there are no

additional dependencies.

Ball # 0: IDE Signals 1: CRT, GPIO and TFT Signals

A26 / AD3 IDE_ADDR0 TFTD3 C26 / AE1 IDE_ADDR1 TFTD2 C17 / U2 IDE_ADDR2 TFTD4 B24 / AC3 IDE_DATA0 TFTD6 A24 / AC1 IDE_DATA1 TFTD16 D23 / AC2 IDE_DATA2 TFTD14 C23 / AB4 IDE_DATA3 TFTD12 B23 / AB1 IDE_DATA4 FP_VDD_ON A23 / AA4 IDE_DATA5 CLK27M C22 / AA3 IDE_DATA6 IRQ9 B22 / AA2 IDE_DATA7 INTD# A21 / Y3 IDE_DATA8 GPIO40 C20 / Y2 IDE_DATA9 DDC_SDA A20 / Y1 IDE_DATA10 DDC_SCL C19 / W4 IDE_DATA11 GPIO41 B19 / W3 IDE_DATA12 TFTD13 A19 / V3 IDE_DATA13 TFTD15 C18 / V2 IDE_DATA14 TFTD17 B18 / V1 IDE_DATA15 TFTD7 A27 / AF2 IDE_CS0# TFTD5 C16 / P2 IDE_CS1# TFTDE C21 / Y4 IDE_IOR0# TFTD10 D24 / AD2 IDE_IOW0# TFTD9 C24 / AC4 IDE_DREQ0 TFTD8 C25 / AD4 IDE_DACK0# TFTD0 A22 / AA1 IDE_RST# TFTDCK A25 / AD1 IDE_IORDY0 TFTD11 D25 / AF1 IRQ14 TFTD1

Name Name

AMD Geode™ SC2200 Processor Data Book 77

32580B

General Configuration Block

Table 4-2. Multiplexing, Interrupt Selection, and Base Address Registers (Continued)

Bit Description

23 TFTPP (TFT/Parallel Port). Determines whether certain balls are used for TFT or PP/ACB1/FPCI. This bit is set to 1 at

power-on if the TFT_PRSNT strap (ball P29) is pulled high.

Ball # 0: PP/ACB1/FPCI 1: TFT

Name Add’l Dependencies Name Add’l Dependencies

H2 / D10 GPIO1 PMR[13] = 0 TFTD12 None

IOCS1# PMR[13] = 1

H3 / A9 GPIO20 PMR[7] = 0 TFTD0 None

J4 / A10 GPIO17 PMR[5] = 0 TFTDCK None

T1 / B17 BUSY/WAIT# Note 1 TFTD3 None

T3 / D17 PE Note 1 TFTD14 Note 1

T4 / C17 SLCT Note 1 TFTD15 Note 1

U1 / A18 PD7 Note 1 TFTD13 Note 1

U3 / B18 ACK# Note 1 TFTDE Note 1

V1 / C18 PD4 Note 1 TFTD10 Note 1

V2 / C19 PD5 Note 1 TFTD11 Note 1

V3 / A20 PD6 Note 1 TFTD1 Note 1

W1 / B20 SLIN#/ASTRB# Note 1 TFTD16 Note 1

W2 / C20 PD3 Note 1 TFTD9 Note 1

W3 / D20 PD2 Note 1 TFTD8 Note 1

Y1 / A21 PD1 Note 1 TFTD7 Note 1

Y3 / B21 INIT# Note 1 TFTD5 Note 1

AA1 / C21 PD0 Note 1 TFTD6 Note 1

AA3 / D21 ERR# Note 1 TFTD4 Note 1

AB1 / A22 STB#/WRITE# Note 1 TFTD17 None

AB2 / D22 AFD#/DSTRB# Note 1 TFTD2 Note 1

AJ13 / N31 AB1C None GPIO20 PMR[7] = 0

AL12 / N30 AB1D None GPIO1 PMR[13] = 0

AL16 / V30 GXCLK PMR[29] = 0 FP_VDD_ON None

Note: 1. PMR[27] = 0 and FPCI_MON = 0

2. PMR[27] = 1 or FPCI_MON = 1

3. ACCESS.bus interface 1 is not available if PMR[23] = 1.

4. If FPCI_MON strap is enabled, the TFT_PRSNT strap should pulled low.

22 RSVD (Reserved). Must be set equal to PMR[14] (LPCSEL). The LPC_ROM strap (ball D6) determines the power-on reset

(POR) state of PMR[14] and PMR[22].

DOCCS# PMR[7] = 1

IOCS0# PMR[5] = 1

F_C/BE1# Note 2

F_C/BE2# Note 2

F_C/BE3# Note 2

F_AD7 Note 2

FPCICLK Note 2

F_AD4 Note 2

F_AD5 Note 2

F_AD6 Note 2

F_IRDY# Note 2

F_AD3 Note 2

F_AD2 Note 2

F_AD1 Note 2

SMI_O Note 2

F_AD0 Note 2

F_C/BE0# Note 2

F_FRAME# Note 2

INTR_O Note 2

DOCCS# PMR[7] = 1

IOCS1# PMR[13] = 1

TEST3 PMR[29] = 1

78 AMD Geode™ SC2200 Processor Data Book

General Configuration Block

32580B

Table 4-2. Multiplexing, Interrupt Selection, and Base Address Registers (Continued)

Bit Description

21 IOCSEL (Select I/O Commands). Selects ball functions.

Ball # 0: I/O Command Signals 1: GPIO Signals

Name Add’l Dependencies Name Add’l Dependencies

F1 / D9 IOR# PMR[2] = 0 GPIO14 PMR[2] = 1

G3 / A8 IOW# PMR[2] = 0 GPIO15 PMR[2] = 1

20 Reserved. Must be set to 0.

19 AB2SEL (Select ACCESS.bus 2). Selects ball functions.

Ball # 0: GPIO Signals 1: ACCESS.bus 2 Signals

AJ12 / N29 GPIO12 None AB2C None

AL11 / M29 GPIO13 None AB2D None

18 SP2SEL (Select SP2 Additional Pins). Selects ball functions.

Ball # 0: GPIO, IDE Signals 1: Serial Port Signals

AH3 / D28 GPIO6 PMR[8] = 0 DTR2#/BOUT2 PMR[8] = 0

AG4 / C28 GPIO9 PMR[8] = 0 DCD2# PMR[8] = 0

AJ1 / B29 GPIO10 PMR[8] = 0 DSR2# PMR[8] = 0

H30 / AJ8 GPIO11 PMR[8] = 0 RI2# PMR[8] = 0

17 SP2CRSEL (Select SP2 Flow Control). Selects ball functions.

Ball # 0: GPIO, IDE Signals 1: Serial Port Signals

AH4 / C30 GPIO7 PMR[8] = 0 RTS2# PMR[8] = 0

AJ2 / C31 GPIO8 PMR[8] = 0 CTS2# PMR[8] = 0

16 SP1SEL (Select SP1 Additional Pin). Selects ball function.

Ball # 0: GPIO Signal 1: Serial Port Signal

A28 / AG1 GPIO18 None DTR1#/BOUT1 None

15 RSVD (Reserved). Write to 0.

14 LPCSEL (Select LPC Bus). Selects ball functions. The LPC_ROM strap (ball D6) determines the power-on reset (POR)

state of PMR[14] and PMR[22].

Ball # 0: GPIO Signals 1: LPC Signals

AJ11 / M28 GPIO32 PMR[22] = 0 LAD0 PMR[22] = 1

AL10 / L31 GPIO33 PMR[22] = 0 LAD1 PMR[22] = 1

AK10 / L30 GPIO34 PMR[22] = 0 LAD2 PMR[22] = 1

AJ10 / L29 GPIO35 PMR[22] = 0 LAD3 PMR[22] = 1

AL9 / L28 GPIO36 PMR[22] = 0 LDRQ# PMR[22] = 1

AK9 / K31 GPIO37 PMR[22] = 0 LFRAME# PMR[22] = 1

AJ9 / K28 GPIO38/IRRX2 PMR[22] = 0 LPCPD# PMR[22] = 1

AL8 / J31 GPIO39 PMR[22] = 0 SERIRQ PMR[22] = 1

13 IOCS1SEL (Select IOCS1). Selects ball functions for IOCS1# or GPIO1. Works in conjunction with PMR[23], see PMR[23]

for definition.

DOCR# PMR[2] = 1 Undefined PMR[2] = 0

DOCW# PMR[2] = 1 Undefined PMR[2] = 0

Name Add’l Dependencies Name Add’l Dependencies

IDE_IOR1# PMR[8] = 1 SDTEST5 PMR[8] = 1

IDE_IOW1# PMR[8] = 1 SDTEST2 PMR[8] = 1

IDE_IORDY1 PMR[8] = 1 SDTEST1 PMR[8] = 1

IRQ15 PMR[8] = 1 Undefined PMR[8] = 1

Name Add’l Dependencies Name Add’l Dependencies

IDE_DACK1# PMR[8] = 1 SDTEST0 PMR[8] = 1

IDE_DREQ1 PMR[8] = 1 SDTEST4 PMR[8] = 1

Name Add’l Dependencies Name Add’l Dependencies

AMD Geode™ SC2200 Processor Data Book 79

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General Configuration Block

Table 4-2. Multiplexing, Interrupt Selection, and Base Address Registers (Continued)

Bit Description

12 TRDESEL (Select TRDE#). Selects ball function.

Ball # 0: Sub-ISA Signal 1: GPIO Signal

Name Add’l Dependencies Name Add’l Dependencies

H1 / D11 TRDE# None GPIO0 None

11 EIDE (Enable IDE Outputs). This bit enables IDE output signals.

0: IDE signals are HIZ. Other signals multiplexed on the same balls are HIZ until this bit is set. (without regard to bit 24 of

this register). This bit does not control IDE channel 1 control signals selected by bit 8 of this register.

1: Signals are enabled.

10 ETFT (Enable TFT Outputs). This bit enables TFT output signals, that are multiplexed with the Parallel Port and controlled

by PMR[23].

0: Signals TFTD[17:0], TFTDE and TFTDCK are set to 0.

1: Signals TFTD[17:0], TFTDE and TFTDCK are enabled.

Note: TFTDCK that is multiplexed on IDE_RST# (ball AA1) is also enabled by this bit.

9 IOCHRDY (Select IOCHRDY). Selects ball function.

Ball # 0: PCI, GPIO Signal 1: Sub-ISA Signal

Name Add’l Dependencies Name Add’l Dependencies

H4 / C9 GPIO19 PMR[4] = 0 IOCHRDY PMR[4] = 1

INTC# PMR[4] = 1 Undefined PMR[4] = 0

8 IDE1SEL (Select IDE Channel 1). Selects IDE Channel 1 or GPIO ball functions. Works in conjunction with PMR[18] and

PMR[17], see PMR[18] and PMR[17] for definitions.

7 DOCCSSEL (Select DOCCS#). Selects DOCCS# or GPIO20 ball functions. Works in conjunction with PMR[23], see

PMR[23] for definition.

6 SP3SEL (Select UART3). Selects ball functions.

Ball # 0: IR Signals 1: Serial Port Signals

Name Add’l Dependencies Name Add’l Dependencies

J28 / AK8 IRRX1 None SIN3 None

J3 / C11 IRTX None SOUT3 None

5 IOCS0SEL (Select IOCS0#). Selects ball function. Works in conjunction with PMR[23], see PMR[23] for definition.

4 INTCSEL (Select INTC#). Selects ball function. Works in conjunction with PMR[9], see PMR[9] for definition.

3 Reserved. Write as read.

2 DOCWRSEL (Select DiskOnChip and NAND Flash Command Lines). Selects ball functions. Works in conjunction with

PMR[21], see PMR[21] for definition.

1 Reserved. Write as read.

0 PCBEEPSEL (Select PC_BEEP). Selects ball function.

Ball # 0: GPIO Signal 1: Audio Signal

AL15 / V31 GPIO16 FPCI_MON = 0 PC_BEEP FPCI_MON] = 0

Offset 34h-37h Miscellaneous Configuration Register - MCR (R/W) Reset Value: 0000001h

Power-on reset value: The BOOT16 strap pin selects "Enable 16-Bit Wide Boot Memory".

31 DID0 (Ball C5) Strap Status. (Read Only) Represents the value of the strap that is latched after power-on reset. Read in

conjunction with bit 29.

30 FPCI_MON (Ball A4) Strap Status. (Read Only) Represents the value of the strap that is latched after power-on reset.

Indicates if Fast-PCI monitoring output signals (instead of Parallel Port and some audio signals) are enabled. The state of this bit along with PMR[27] control the Fast-PCI monitoring function. See PMR[27] definition.

29 DID1 (Ball C6) Strap Status. (Read Only) Represents the value of the strap that is latched after power-on reset. Read in

conjunction with bit 31.

28:20 Reserved

19:18 Reserved. Write as 0.

17 HSYNC Timing. HSYNC timing control for TFT.

0: HSYNC timing suited for CRT.

1: HSYNC timing suited for TFT.

Name Add’l Dependencies Name Add’l Dependencies

F_DEVSEL# FPCI_MON = 1 F_DEVSEL# FPCI_MON = 1

80 AMD Geode™ SC2200 Processor Data Book

General Configuration Block

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Table 4-2. Multiplexing, Interrupt Selection, and Base Address Registers (Continued)

Bit Description

16 Delay HSYNC. HSYNC delay by two TFT clock cycles.

0: There is no delay on HSYNC.

1: HYSNC is delayed twice by rising edge of TFT clock. Enables delay between VSYNC and HSYNC suited for TFT dis-

play.

15 Reserved. Write as read.

14 IBUS16 (Invert BUS16). This bit inverts the meaning of MCR[3] (bit 3 of this register).

0: BUS16 is as described for MCR[3].

1: BUS16 meaning is inverted: if MCR[3] = 0, ROMCS# access is 16 bits wide; if MCR[3] = 1, ROMCS# access is 8 bits

wide.

13 Reserved. Must be set to 0.

12 IO1ZWS (Enable ZWS# for IOCS1# Access). This bit enables internal activation of ZWS# (Zero Wait States) control for

IOCS1# access.

0: ZWS# is not active for IOCS1# access.

1: ZWS# is active for IOCS1# access.

11 IO0ZWS (Enable ZWS# for IOCS0# Access). This bit enables internal activation of ZWS# (Zero Wait States) control for

IOCS0# access.

0: ZWS# is not active for IOCS0# access.

1: ZWS# is active for IOCS0# access.

10 DOCZWS (Enable ZWS# for DOCCS# Access). This bit enables internal activation of ZWS# (Zero Wait States) control for

DOCCS# access.

0: ZWS# is not active for DOCCS# access.

1: ZWS# is active for DOCCS# access.

9 ROMZWS (Enable ZWS# for ROMCS# Access). This bit enables internal activation of ZWS# (Zero Wait States) control for

ROMCS# access.

0: ZWS# is not active for ROMCS# access.

1: ZWS# is active for ROMCS# access.

8 IO1_16 (Enable 16-Bit Wide IOCS1# Access). This bit enables the16-line access to IOCS1# in the Sub-ISA interface.

0: 8-bit wide IOCS1# access is used.

1: 16-bit wide IOCS1# access is used.

7 IO0_16 (Enable 16-Bit Wide IOCS0# Access). This bit enables the 16-line access to IOCS0# in the Sub-ISA interface.

0: 8-bit wide IOCS0# access is used.

1: 16-bit wide IOCS0# access is used.

6 DOC16 (Enable 16-Bit Wide DOCCS# Access). This bit enables the 16-line access to DOCCS# in the Sub-ISA interface.

0: 8-bit wide DOCCS# access is used.

1: 16-bit wide DOCCS# access is used.

5 Reserved. Write as read.

4 IRTXEN (Infrared Transmitter Enable). This bit enables drive of Infrared transmitter output.

0: IRTX+SOUT3 line (ball C11) is HIZ.

1: IRTX+SOUT3 line (ball C11) is enabled.

3 BUS16 (16-Bit Wide Boot Memory). (Read Only) This bit reports the status of the BOOT16 strap (ball C8). If the BOOT16

strap is pulled high, at reset 16-bit access to ROM in the Sub-ISA interface is enabled. MCR[14] = 1 inverts the meaning of this register.

0: 8-bit wide ROM.

1: 16-bit wide ROM.

2:1 Reserved. Write as read.

AMD Geode™ SC2200 Processor Data Book 81

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General Configuration Block

Table 4-2. Multiplexing, Interrupt Selection, and Base Address Registers (Continued)

Bit Description

0 SDBE0 (Slave Disconnect Boundary Enable). Works in conjunction with the GX1 module’s PCI Control Function 2 Regis-

ter (Index 41h), bit 1 (SDBE1). Sets boundaries for when the GX1 module is a PCI slave.

SDBE[1:0]

00: Read and Write disconnect on boundaries set by bits [3:2] of the GX1 module’s PCI Control Function 2 register (Index

41h).

01: Write disconnects on boundaries set by bits [3:2] of the GX1 module’s PCI Control Function 2 register. Read discon-

nects on cache line boundary of 16 bytes.

1x: Read and Write disconnect on cache line boundary of 16 bytes.

This bit is reset to 1.

All PCI bus masters (including SC2200’s on-chip PCI bus masters, e.g., the USB Controller) must be disabled while modifying this bit. When accessing this register while any PCI bus master is enabled, use read-modify-write to ensure these bit contents are unchanged.

Offset 38h Interrupt Selection Register - INTSEL (R/W) Reset Value: 00h

This register selects the IRQ signal of the combined WATCHDOG and High-Resolution timer interrupt. This interrupt is shareable with other interrupt sources.

7:4 Reserved. Write as read.

3:0 CBIRQ. Configuration Block Interrupt.

0000: Disable 0100: IRQ4 1000: IRQ8# 1100: IRQ12

0001: IRQ1 0101: IRQ5 1001: IRQ9 1101: Reserved

0010: Reserved 0110: IRQ6 1010: IRQ10 1110: IRQ14

0011: IRQ3 0111: IRQ7 1011: IRQ11 1111: IRQ15

Offset 39h-3Bh Reserved - RSVD

Offset 3Ch Device Identification Number Register - ID (RO) Reset Value: xxh

This register identifies the device. SC2200 = 04h.

Offset 3Dh Revision Register - REV (RO) Reset Value: xxh

This register identifies the device revision. See AMD Geode™ SC2200 Processor Specification Update document for value.

Offset 3Eh-3Fh Configuration Base Address Register - CBA (RO) Reset Value: xxh

This register sets the base address of the Configuration block.

15:6 Configuration Base Address. These bits are the high bits of the Configuration Base Address.

5:0 Configuration Base Address. These bits are the low bits of the Configuration Base Address. These bits are set to 0.

82 AMD Geode™ SC2200 Processor Data Book

General Configuration Block

4.3 WATCHDOG

The SC2200 includes a WATCHDOG function to serve as a fail-safe mechanism in case the system becomes hung. When triggered, the WATCHDOG mechanism returns the system to a known state by generating an interrupt, an SMI, or a system reset (depending on configuration).

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• The GX1 module’s internal SUSPA# signal is 1.

• The GX1 module’s internal SUSPA# signal is 0 and the WD32KPD bit (Offset 02h[8]) is 0.

4.3.1 Functional Description

WATCHDOG is enabled when the WATCHDOG Timeout (WDTO) register (Offset 00h) is set to a non-zero value. The WATCHDOG timer starts with this value and counts down until either the count reaches 0, or a trigger event restarts the count (with the WDTO register value).

The WATCHDOG timer is restarted in any of the following cases:

• The WDTO register is set with a non-zero value.

• The WATCHDOG timer reaches 0 and the WATCHDOG

Overflow bit, WDOVF (Offset 04h[0]), is 0.

The WATCHDOG function is disabled in any of the following cases:

• System reset occurs.

• The WDTO register is set to 0.

• The WDOVF bit is already 1 when the timer reaches 0.

4.3.1.1 WATCHDOG Timer

The WATCHDOG timer is a 16-bit down counter. Its input clock is a 32 KHz clock divided by a predefined value (see WDPRES field, Offset 02h[3:0]). The 32 KHz input clock is enabled when either:

The 32 KHz input clock is disabled, when:

• The GX1 module’s internal SUSPA# signal is 0 and the WD32KPD bit is 1.

For more information about signal SUSPA#, refer to the AMD Geode™ GX1 Processor Data Book.

When the WATCHDOG timer reaches 0:

• If the WDOVF bit in the WDSTS register (Offset 04h[0]) is 0, an interrupt, an SMI or a system reset is generated, depending on the value of the WDTYPE1 field in the WDCNFG register (Offset 02h[5:4]).

• If the WDOVF bit in the WDSTS register is already 1 when the WATCHDOG timer reaches 0, an interrupt, an SMI or a system reset is generated according to the WDTYPE2 field (Offset 02h[7:6]), and the timer is disabled. The WATCHDOG timer is re-enabled when a non-zero value is written to the WDTO register (Offset 00h).

The interrupt or SMI is de-asserted when the WDOVF bit is set to 0. The reset generated by the WATCHDOG functionis used to trigger a system reset via the Core Logic module. The value of the WDOVF bit, the WDTYPE1 field, and the WDTYPE2 field are not affected by a system reset (except when generated by power-on reset).

The SC2200 also allows no action to be taken when the timer reaches 0 (according to WDTYPE1 field and WDTYPE2 field). In this case only the WDOVF bit is set to

Internal Fast-PCI Bus

SUSPA#

32 KHz

POR#

WATCHDOG

WDPRES

WDTO

Timer WDOVF

WDTYPE1 or

WDTYPE2

Reset IRQ SMI

Figure 4-1. WATCHDOG Block Diagram

AMD Geode™ SC2200 Processor Data Book 83

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General Configuration Block

WATCHDOG Interrupt

The WATCHDOG interrupt (if configured and enabled) is

4.3.2 WATCHDOG Registers

Table 4-3 describes the WATCHDOG registers. routed to an IRQ signal. The IRQ signal is programmable via the INTSEL register (Offset 38h, described in Table 4-2 "Multiplexing, Interrupt Selection, and Base Address Regis-

ters" on page 76). The WATCHDOG interrupt is a shareable, active low, level interrupt.

WATCHDOG SMI

The WATCHDOG SMI is recognized by the Core Logic module as internal input signal EXT_SMI0#. To use the WATCHDOG SMI, Core Logic registers must be configured appropriately.

4.3.2.1 Usage Hints

• SMM code should set bit 8 of the WDCNFG register to 1

when entering ACPI C3 state, if the WATCHDOG timer is to be suspended. If this is not done, the WATCHDOG timer is functional during C3 state.

• SMM code should set bit 8 of the WDCNFG register to 1, when entering ACPI S1 and S2 states if the WATCHDOG timer is to be suspended. If this is not done, the WATCHDOG timer is functional during S1 and S2 states.

Table 4-3. WATCHDOG Registers

Bit Description

Offset 00h-01h WATCHDOG Timeout Register - WDTO (R/W) Reset Value: 0000h

This register specifies the programmed WATCHDOG timeout period.

15:0 Programmed timeout period.

Offset 02h-03h WATCHDOG Configuration Register - WDCNFG (R/W) Reset Value: 0000h

This register selects the signal to be generated when the timer reaches 0, whether or not to disable the 32 KHz input clock during low power states, and the prescaler value of the clock input.

15:9 Reserved. Write as read.

8 WD32KPD (WATCHDOG 32 KHz Power Down).

0: 32 KHz clock is enabled.

1: 32 KHz clock is disabled, when the GX1 module asserts its internal SUSPA# signal.

This bit is cleared to 0, when POR# is asserted or when the GX1 module de-asserts its internal SUSPA# signal (i.e., on SUSPA# rising edge). See Section 4.3.2.1 "Usage Hints" on page 84.

7:6 WDTYPE2 (WATCHDOG Event Type 2).

00: No action

01: Interrupt

10: SMI

11: System reset

This field is reset to 0 when POR# is asserted. Other system resets do not affect this field.

5:4 WDTYPE1 (WATCHDOG Event Type 1).

00: No action

01: Interrupt

10: SMI

11: System reset

This field is reset to 0 when POR# is asserted. Other system resets do not affect this field.

3:0 WDPRES (WATCHDOG Timer Prescaler). Divide 32 KHz by:

0000: 1 0100: 16 1000: 256 1100: 4096

0001: 2 0101: 32 1001: 512 1101: 8192

0010: 4 0110: 64 1010: 1024 1110: Reserved

0011: 8 0111: 128 1011: 2048 1111: Reserved

Offset 04h WATCHDOG Status Register - WDSTS (R/WC) Reset Value: 00h

This register contains WATCHDOG status information.

7:4 Reserved. Write as read.

3 WDRST (WATCHDOG Reset Asserted) (Read Only). This bit is set to 1 when WATCHDOG Reset is asserted. It is set to

0 when POR# is asserted, or when the WDOVF bit is set to 0.

2 WDSMI (WATCHDOG SMI Asserted.) (Read Only). This bit is set to 1 when WATCHDOG SMI is asserted. It is set to 0

when POR# is asserted, or when the WDOVF bit is set to 0.

84 AMD Geode™ SC2200 Processor Data Book

General Configuration Block

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Table 4-3. WATCHDOG Registers (Continued)

Bit Description

1 WDINT (WATCHDOG Interrupt Asserted, Read Only). This bit is set to 1 when the WATCHDOG Interrupt is asserted. It

is set to 0 when POR# is asserted, or when the WDOVF bit is set to 0.

0 WDOVF (WATCHDOG Overflow). This bit is set to 1 when the WATCHDOG Timer reaches 0. It is set to 0 when POR# is

asserted, or when a 1 is written to this bit by software. Other system reset sources do not affect this bit.

Offset 05h-07h Reserved - RSVD

4.4 High-Resolution Timer

The SC2200 provides an accurate time value that can be used as a time stamp by system software. This time is called the High-Resolution Timer. The length of the timer value can be extended via software. It is normally enabled while the system is in the C0 and C1 states. Optionally, software can be programmed to enable use of the HighResolution Timer during C3 state and/or S1 state as well. In all other power states the High-Resolution Timer is disabled.

4.4.1 Functional Description

The High-Resolution Timer is a 32-bit free-running countup timer that uses the oscillator clock or the oscillator clock divided by 27. Bit TMCLKSEL of the TMCNFG register (Offset 0Dh[1]) can be set via software to determine which clock should be used for the High-Resolution Timer.

When the most significant bit (bit 31) of the timer changes from 1 to 0, bit TMSTS of the TMSTS register (Offset 0Ch[0]) is set to 1. When both bit TMSTS and bit TMEN (Offset 0Dh[0]) are 1, an interrupt is asserted. Otherwise, the interrupt is de-asserted. This interrupt enables software emulation of a larger timer.

The High-Resolution Timer interrupt is routed to an IRQ signal. The IRQ signal is programmable via the INTSEL register (Offset 38h). For more information about this register, see section Section 4.2 "Multiplexing, Interrupt Selection, and Base Address Registers" on page 76.

System software uses the read-only TMVALUE register (Offset 08h[31:0]) to read the current value of the timer. The TMVALUE register has no default value.

The input clock (derived from the 27 MHz crystal oscillator) is enabled when:

The input clock is disabled, when the GX1 module’s internal SUSPA# signal is 0 and the TM27MPD bit is 1.

For more information about signal SUSPA# see Section

4.4.2.1 "Usage Hints" on page 85 and the AMD Geode™

GX1 Processor Data Book.

The High-Resolution Timer function resides on the internal Fast-PCI bus and its registers are in General Configuration Block address space. Only one complete register should be accessed at-a-time (e.g., DWORD access should be used for DWORD wide registers and byte access should be used for byte-wide registers).

4.4.2 High-Resolution Timer Registers

Table 4-4 on page 86 describes the registers for the HighResolution Timer (TIMER).

4.4.2.1 Usage Hints

• SMM code should set bit 2 of the TMCNFG register to 1

when entering ACPI C3 state if the High-Resolution Timer should be disabled. If this is not done, the HighResolution Timer is functional during C3 state.

• SMM code should set bit 2 of the TMCNFG register to 1 when entering ACPI S1 state if the High-Resolution Timer should be disabled. If this is not done, the HighResolution Timer is functional during S1 state.

• The GX1 module’s internal SUSPA# signal is 1.

• The GX1 module’s internal SUSPA# signal is 0 and bit TM27MPD (Offset 0Dh[2]) is 0.

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General Configuration Block

Table 4-4. High-Resolution Timer Registers

Bit Description

Offset 08h-0Bh TIMER Value Register - TMVALUE (RO) Reset Value: xxxxxxxxh

This register contains the current value of the High-Resolution Timer.

31:0 Current Timer Value.

Offset 0Ch TIMER Status Register - TMSTS (R/W) Reset Value: 00h

This register supplies the High-Resolution Timer status information.

7:1 Reserved.

0 TMSTS (TIMER Status). This bit is set to 1 when the most significant bit (bit 31) of the timer changes from 1 to 0. It is

cleared to 0 upon system reset or when 1 is written by software to this bit.

Offset 0Dh TIMER Configuration Register - TMCNFG (R/W) Reset Value: 00h

This register enables the High-Resolution Timer interrupt; selects the Timer clock; and disables the 27 MHz internal clock during low power states.

7:3 Reserved.

2 TM27MPD (TIMER 27 MHz Power Down). This bit is cleared to 0 when POR# is asserted or when the GX1 module de-

asserts its internal SUSPA# signal (i.e., on SUSPA# rising edge). See Section 4.4.2.1 "Usage Hints" on page 85.

0: 27 MHz input clock is enabled.

1: 27 MHz input clock is disabled when the GX1 module asserts its internal SUSPA# signal.

1 TMCLKSEL (TIMER Clock Select).

0: Count-up timer uses the oscillator clock divided by 27.

1: Count-up timer uses the oscillator clock, 27 MHz clock.

0 TMEN (TIMER Interrupt Enable).

0: High-Resolution Timer interrupt is disabled.

1: High-Resolution Timer interrupt is enabled.

Offset 0Eh-0Fh Reserved - RSVD

86 AMD Geode™ SC2200 Processor Data Book

General Configuration Block

4.5 Clock Generators and PLLs

This section describes the registers for the clocks required by the GX1 module, Core Logic module, and the Video Processor, and how these clocks are generated. See Figure 4-2 for a clock generation diagram.

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The clock generators are based on 32.768 KHz and 27.000 MHz crystal oscillators. The 32.768 KHz crystal oscillator is described in Section 5.5.2 "RTC Clock Generation" on page 111 (functional description of the RTC).

32.768 KHz Crystal

Oscillator

27 MHz

Crystal

Oscillator

32.768 KHz

Shutdown

DISABLE

Shutdown

(ACPI)

PLL4

48 MHz

24.576 MHz

PLL6

57.273 MHz

CLK

PLL2

25-135 MHz

PLL5

66.67 MHz

Divide

PLL3

by 2

Divide

by 4

48 MHz

66 MHz

33 MHz

Real-Time Clock (RTC)

USB Clock (48 MHz)

and I/O Block Clock

DISABLE

AC97_CLK

(24.576 MHz)

High-Resolution Timer Clock

ACPI Clock (14.318 MHz)

CLK27M Ball

Dot Clock

Internal Fast-PCI Clock

External PCI Clock

(33.3 MHz)

DISABLE

To PA D

Core Clock

SDRAM Clock

Note: V

powers PLL2 and PLL5. V

PLL2

Shutdown

(ACPI)

ADL

100-333 MHz

Divider

powers PLL3, PLL4, and PLL6.

PLL3

Figure 4-2. Clock Generation Block Diagram

AMD Geode™ SC2200 Processor Data Book 87

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4.5.1 27 MHz Crystal Oscillator

The internal oscillator employs an external crystal connected to the on-chip amplifier. The on-chip amplifier is accessible on the X27I input and X27O output signals. See Figure 4-3 for the recommended external circuit and Table 4-5 for a list of the circuit components.

Choose C1 and C2 capacitors to match the crystal’s load capacitance. The load capacitance CL “seen” by crystal Y is comprised of C

in series with C2 and in parallel with the

parasitic capacitance of the circuit. The parasitic capacitance is caused by the chip package, board layout and socket (if any), and can vary from 0 to 10 pF. The rule of thumb in choosing these capacitors is:

= (C1 * C2) / (C1 + C2) + C

PARASITIC

Example 1:

Crystal CL = 10 pF, C

PARASITIC

= 8.2 pF

C1 = 3.6 pF, C2 = 3.6 pF

Example 2:

Crystal C

= 20 pF, C

PARASITIC

= 8 pF

C1 = 24 pF, C2 = 24 pF

Table 4-5. Crystal Oscillator Circuit Components

General Configuration Block

To other

modules

Internal

X27I

X27O

External

Figure 4-3. Recommended Oscillator External

Circuitry

Component Parameters Values Tolerance

Crystal Resonance Frequency 27.00 MHz Parallel mode 50 PPM or better

Type AT-cut or BT-cut Serial Resistance 40 Ω Max

Shunt Capacitance 7 pF Max

Load Capacitance, C

10-20 pF

Temperature Coefficient User-defined

Resistor R

Capacitor C

Resistance 20 MΩ 5%

Resistance 100 Ω 5%

Capacitance 3-24 pF 5%

1. The value of these components is recommended. It should be tuned according to crystal and board parameters.

88 AMD Geode™ SC2200 Processor Data Book

General Configuration Block

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4.5.2 GX1 Module Core Clock

The core clock is generated by an Analog Delay Loop (ADL) clock generator from the internal Fast-PCI clock. The clock can be any whole-number multiple of the input clock between 4 and 10. Possible values are listed in Table 4-6.

At power-on reset, the core clock multiplier value is set according to the value of four strapped balls - CLKSEL[3:0] (balls P30, D29, AF3, B8). These balls also select the clock which is used as input to the multiplier, as shown in Table 4-7.

4.5.3 Internal Fast-PCI Clock

The internal Fast-PCI clock can be configured to 33, 48, or 66 MHz via strap options on the CLKSEL1 and CLKSEL0 balls. These can be read in the internal Fast-PCI Clock field in the CCFC register (GCB+I/O Offset 1Eh[9:8]). (See Table 4-9 on page 92 details on the CCFC register.)

Table 4-7. Strapped Core Clock Frequency

Internal Fast-PCI Clock

CLKSEL[3:0]

Straps

(GCB+I/O Offset 1Eh[9:8])

Freq. (MHz)

Multiply By

Table 4-6. Core Clock Frequency

ADL

Multiplier

Val ue

4 133.3 192 266.7

5 166.7 240 ---

6 200 288 ---

7 233.3 --- ---

8 266.7 --- ---

9 300 --- ---

10 --- --- ---

Default ADL Multiplier

(GCB+I/O Offset 1Eh[3:0])

Internal Fast-PCI Clock Freq. (MHz)

33.33 48 66.67

Multiplier Value

Maximum Core

Clock Freq. (MHz)

0111 33.33 4 0100 133

1011 5 0101 167

1111 6 0110 200

0000 7 0111 233

0100 8 1000 266

1000 9 1001 300

1100 10 1010 Reserved

0001 48 4 0100 192

0101 5 0101 240

1001 6 0110 288

1101 7 0111 Reserved

0110 66.67 4 0100 266

1010 5 0101 Reserved

Note: Not all speeds are supported. For information on supported speeds, see Section A.1 "Order Information" on page

447.

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4.5.4 SuperI/O Clocks

The SuperI/O module requires a 48 MHz input for Fast infrared (FIR), UART, and other functions. This clock is supplied by PLL4 using a multiplier value of 576/(108x3) to generate 48 MHz.

4.5.5 Core Logic Module Clocks

The Core Logic module requires the following clock sources:

Real-Time Clock (RTC)

RTC requires a 32.768 KHz clock which is supplied directly from an internal low-power crystal oscillator. This oscillator uses battery power and has very low current consumption.

USB

The USB requires a 48 MHz input which is supplied by PLL4. The required total frequency accuracy and slow jitter for USB is 500 PPM; edge to edge jitter is ±1.2%.

ACPI

The ACPI logic block uses a 14.32 MHz clock supplied by PLL6. PLL6 creates this clock from the 32.768 KHz clock, with a multiplier value of 6992/4 to output a 57.278 MHz clock that is divided by 4.

4.5.6 Video Processor Clocks

The Video processor requires the following clock sources:

Dot

The Dot clock is generated by PLL2. It is supplied to the Display Controller in the GX1 module (DCLK) that creates the pixel information, and is returned to the Graphics block (PCLK) with this information. PLL2 uses the 27 MHz clock to generate the Dot clock.

Video

The Video clock source depends on the source of the video data.

• If the video data is coming from the GX1 module (Capture Video mode), the video clock is generated by the Display Controller.

• If the video data is coming directly from the VIP block (Direct Video mode), the Video Clock is generated by the VIP block.

External PCI

The PCI Interface uses a 33.3 MHz clock that is created by PLL5 and divided by 2. PLL5 uses the 27 MHz clock, to output a 66.67 MHz clock. PLL5 has a frequency accuracy of ± 0.1%.

AC97

The SC2200 generates the 24.576 MHz clock required by the audio codec. Therefore, no crystal need be included for the audio codec on the system board.

PLL3 uses the crystal oscillator clock, to generate a 24.576 MHz clock. This clock is driven on the AC97_CLK ball. The accuracy of the clock supplied by the SC2200 is 50 PPM.

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4.5.7 Clock Registers

Table 4-9 describes the registers of the clock generator and PLL.

Table 4-8. Clock Generator Configuration

Bit Description

Offset 10h Maximum Core Clock Multiplier Register - MCCM (RO) Reset Value: Strapped Value

This register holds the maximum core clock multiplier value. The maximum clock frequency allowed by the core, is the Fast-PCI clock multiplied by this value.

7:4 Reserved.

3:0 MCM (Maximum Clock Multiplier). This 4-bit value is the maximum multiplier value allowed for the core clock generator. It

Offset 11h Reserved - RSVD

Offset 12h PLL Power Control Register - PPCR (R/W) Reset Value: 2Fh

This register controls operation of the PLLs.

Offset 13h-17h Reserved - RSVD

is derived from strap pins CLKSEL[3:0] based on the multiplier value in Table 4-7 on page 89.

7 Reserved.

6 EXPCID (Disable External PCI Clock).

0: External PCI clock is enabled.

1: External PCI clock is disabled.

5 GPD (Disable Graphic Pixel Reference Clock).

0: PLL2 input clock is enabled.

1: PLL2 input clock is disabled.

4 Reserved.

3 PLL3SD (Shut Down PLL3). AC97 codec clock.

0: PLL3 is enabled.

1: PLL3 is shutdown.

2 FM1SD (Shut Down PLL4).

0: PLL4 is enabled.

1: PLL4 is shutdown, unless internal Fast-PCI clock is strapped to 48 MHz.

1 C48MD (Disable SuperI/O and USB Clock).

0: USB and SuperI/O clock is enabled.

1: USB and SuperI/O clock is disabled.

0 Reserved. Write as read.

Offset 18h-1Bh PLL3 Configuration Register - PLL3C (R/W) Reset Value: E1040005h

31:24 MFFC (MFF Counter Value).

Fvco = OSCCLK * MFBC / (MFFC * MOC) OSCCLK = 27 MHz

23:19 Reserved. Write as read.

18:8 MFBC (MFB Counter Value).

Fvco = OSCCLK * MFBC / (MFFC * MOC) OSCCLK = 27 MHz

Note: Bits 18, 9, and 8 cannot be changed. Bit 18 is always a 1; bits 9 and 8 are always 0.

7 Reserved. Write as read.

6 Reserved. Must be set to 0.

5:0 MOC (MO Counter Value).

Fvco = OSCCLK * MFBC / (MFFC * MOC) OSCCLK = 27 MHz

Offset 1Eh-1Fh Core Clock Frequency Control Register - CCFC (R/W) Reset Value: Strapped Value

This register controls the configuration of the core clock multiplier and the reference clocks.

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Table 4-8. Clock Generator Configuration (Continued)

Bit Description

15:14 Reserved.

13 Reserved. Must be set to 0.

12 Reserved. Must be set to 0.

11:10 Reserved.

9:8 FPCICK (Internal Fast-PCI Clock). (Read Only) Reflects the internal Fast-PCI clock and is the input to the GX1 module

7:4 Reserved.

3:0 MVAL (Multiplier Value). This 4-bit value controls the multiplier in ADL. The value is set according to the Maximum Clock

that is used to generate the core clock. These bits reflect the value of strap pins CLKSEL[1:0].

00: 33.3 MHz

01: 48 MHz

10: 66.7 MHz

11: 33.3 MHz

Multiplier bits of the MCCM register (Offset 10h). The multiplier value should never be written with a multiplier which is different from the multiplier indicated in the MCCM register.

0100: Multiply by 4

0101: Multiply by 5

0110: Multiply by 6

0111: Multiply by 7

1000: Multiply by 8

1001: Multiply by 9

1010: Multiply by 10

Other: Reserved

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5.0SuperI/O Module

The SuperI/O (SIO) module is PC98 and ACPI compliant. It offers a single-cell solution to the most commonly used ISA peripherals.

Serial

Interface

Serial Port 1

System Wakeup

Control

Serial

Interface

Serial Port 2

Infrared /Serial

Interface

IR Comunication

Port/Serial Port 3

ACCESS.bus 1

Outstanding Features

• Full compatibility with ACPI Revision 1.0 requirements.

• System Wakeup Control powered by V

power-up request and a PME (power management event) in response to SDATA_IN2 (an audio codec), IRRX1 (a pre-programmed CEIR), or a RI2# (Serial Port ring indicate) event.

• Advanced RTC, Y2K compliant.

Real-Time Clock

ACCESS.bus 2

BAT

IEEE 1284

Parallel Por t

, generates

ISA

Interface

Host Interface

Wakeup

Events

AMD Geode™ SC2200 Processor Data Book 95

AB1DAB1C

Figure 5-1. SIO Block Diagram

AB2C

AB2DPWUREQ

Parallel Por t

Interface

5.1 Features

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SuperI/O Module

PC98 and ACPI Compliant

• PnP Configuration Register structure

• Flexible resource allocation for all logical devices:

— Relocatable base address — 9 parallel IRQ routing options — 3 optional 8-bit DMA channels (where applicable)

Parallel Port

• Software or hardware control

• Enhanced Parallel Port (EPP) compatible with version

EPP 1.9 and IEEE 1284 compliant

• EPP support for version EPP 1.7 of the Xircom specification

• EPP support as mode 4 of the Extended Capabilities Por t (EC P)

• IEEE 1284 compliant ECP, including level 2

• Selection of internal pull-up or pull-down resistor for

Paper End (PE) pin

• PCI bus utilization reduction by supporting a demand DMA mode mechanism and a DMA fairness mechanism

• Protection circuit that prevents damage to the Parallel Port when a printer connected to it powers up or is operated at high voltages, even if the device is in powerdown

• Output buffers that can sink and source 14 mA

Serial Port 1

• 16550A compatible (SIN1, SOUT1, DTR1#/BOUT1

signals only)

Serial Port 2

• 16550A compatible

Serial Port 3 / Infrared (IR) Communication Port

• Serial Port 3

— SIN and SOUT signals only — Data rate of up to 1.5 Mbps — Software compatible with the 16550A and the 16450 — Shadow register support for write-only bit monitoring — DMA support

• IR Communication Port — IrDA 1.1 and 1.0 compatible — Data rate of up to 115.2 Kbps (HP-SIR) — Data rate of 1.152 Mbps (MIR) — Data rate of 4.0 Mbps (FIR) — Selectable internal or external modulation/demodula-

tion (ASK-IR and DASK-IR options of SHARP-IR) — Consumer-IR (TV-Remote) mode — Consumer Remote Control supports RC-5, RC-6,

NEC, RCA and RECS 80 — DMA support

System Wakeup Control (SWC)

• Power-up request upon detection of RI2#, CEIR, or

SDATA_IN2 activity: — Optional routing of power-up request on IRQ line

• Pre-programmed CEIR address in a pre-selected standard (any NEC, RCA or RC-5)

• Powered by V

• Battery-backed wakeup setup

• Power-fail recovery support

Real-Time Clock

• A modifiable address that is referenced by a 16-bit

programmable register

• DS1287, MC146818 and PC87911 compatibility

• 242 bytes of battery backed up CMOS RAM in two

banks

• Selective lock mechanisms for the CMOS RAM

• Battery backed up century calendar in days, day of the

week, date of month, months, years and century, with automatic leap-year adjustment

• Battery backed-up time of day in seconds, minutes and hours that allows a 12 or 24 hour format and adjustments for daylight savings time

• BCD or binary format for time keeping

• Three different maskable interrupt flags:

— Periodic interrupts - At intervals from 122 msec to

500 msec

— Time-of-Month alarm - At intervals from once per

second to once per month

— Update Ended Interrupt - Once per second upon

completion of update

• Separate battery pin, 3.0V operation that includes an internal UL protection resistor

• 7 µA typical power consumption during power down

• Double-buffer time registers

• Y2K Compliant

Clock Sources

• 48 MHz clock input

• On-chip low frequency clock generator for wakeup

• 32.768 KHz crystal with an internal frequency multiplier

to generate all required internal frequencies

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5.2 Module Architecture

The SIO module comprises a collection of generic functional blocks. Each functional block is described in detail later in this chapter. The beginning of this chapter describes the SIO structure and provides all device specific information, including special implementation of generic blocks, system interface and device configuration.

The SIO module is based on eight logical devices, the host interface, and a central configuration register set, all built around a central, internal 8-bit bus.

The host interface serves as a bridge between the external ISA interface and the internal bus. It supports 8-bit I/O read, 8-bit I/O write and 8-bit DMA transactions, as defined in Personal Computer Bus Standard P996.

32580B

The central configuration register set supports ACPI compliant PnP configuration. The configuration registers are structured as a subset of the Plug and Play Standard Registers, defined in Appendix A of the Plug and Play ISA Specification Version 1.0a by Intel and Microsoft

. All system resources assigned to the functional blocks (I/O address space, DMA channels and IRQ lines) are configured in, and managed by, the central configuration register set. In addition, some function-specific parameters are configurable through this unit and distributed to the functional blocks through special control signals.

The source of the device internal clocks is the 48 MHz clock signal or through the 32.768 KHz crystal with an internal frequency multiplier. RTC operates on a 32 KHz clock.

AFD#/DSTRB#

ACK#

BUSY/WAIT#

ERR#

INIT#

PD[7:0]

SLCT

SLIN#/ASTRB#

STB#/WRITE#

AB1C

AB1D

AB2C

AB2D

Real-Time Clock (RTC)

Parallel

Por t

ACCESS.

bus 1

ACCESS.

bus 2

IRTX/SOUT3

Infrared

Communication

Port/Serial Port 3

Configuration

and Control

Registers

System

Wakeup

IRRX1/SIN3

Serial Por t 1

Serial Por t 2

Internal

Host

Interface

SIN1

SOUT1

DTR#/BOUT1

SIN2 SOUT2 RTS2# DTR2#/BOUT2 CTS2 RI2# DCD2# DSR2#

TC DACK0-3 DRQ0-3 IRQ1-12,14-15 IOCHRDY ZWS# IOWR# IORD# AEN

Internal Signals

ALARM

Internal

Signal

X2C

X1C/X1

BAT

Internal Bus

Control Signals

RI2#

PWUREQ

SDATA_IN2

Internal Signals

CONFIG

CLKIN

D[7:0]

A[15:0]

Figure 5-2. Detailed SIO Block Diagram

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5.3 Configuration Structure/Access

This section describes the structure of the configuration register file, and the method of accessing the configuration registers.

5.3.1 Index-Data Register Pair

The SIO configuration access is performed via an IndexData register pair, using only two system I/O byte locations. The base address of this register pair is determined according to the state of the IO_SIOCFG_IN bit field of the Core Logic module (F5BAR0+I/O Offset 00h[26:25]). Table 5-1 shows the selected base addresses as a function of the IO_SIOCFG_IN bit field.

Table 5-1. SIO Configuration Options

I/O Address

IO_SIOCFG_IN

Settings

00 - - SIO disabled

01 - - Configuration

10 002Eh 002Fh Base address 1

11 015Ch 015Dh Base address 2

The Index Register is an 8-bit R/W register located at the selected base address (Base+0). It is used as a pointer to the configuration register file, and holds the index of the configuration register that is currently accessible via the Data Register. Reading the Index Register returns the last value written to it (or the default of 00h after reset).

The Data Register is an 8-bit virtual register, used as a data path to any configuration register. Accessing the data register results with physically accessing the configuration register that is currently pointed by the Index Register.

5.3.2 Banked Logical Device Registers

Each functional block is associated with a Logical Device Number (LDN). The configuration registers are grouped into banks, where each bank holds the standard configuration registers of the corresponding logical device. Table 5-2 shows the LDNs of the device functional blocks.

Index

Data

Description

access disabled

selected

Table 5-2. LDN Assignments

LDN Functional Block Reference

00h Real-Time Clock (RTC) Page 104

01h System Wakeup Control (SWC) Page 106

02h Infrared Communication Port

(IRCP) or Serial Port 3 (SP3)

03h Serial Port 1 (SP1) Page 108

05h ACCESS.bus 1 (ACB1) Page 109

06h ACCESS.bus 2 (ACB2)

07h Parallel Port (PP) Page 110

08h Serial Port 2 (SP2) Page 108

Figure 5-3 shows the structure of the standard PnP configuration register file. The SIO Control And Configuration registers are not banked and are accessed by the IndexData register pair only (as described above). However, the Logical Device Control and Configuration registers are duplicated over eight banks for eight logical devices. Therefore, accessing a specific register in a specific bank is performed by two-dimensional indexing, where the LDN register selects the bank (or logical device), and the Index register selects the register within the bank. Accessing the Data register while the Index register holds a value of 30h or higher results in a physical access to the Logical Device Configuration registers currently pointed to by the Index register, within the logical device bank currently selected by the LDN register.

07h

20h 2Fh

30h

60h 63h 70h 71h 74h 75h

F0h

FEh

Logical Device Number Register

SIO Configuration Registers

Logical Device Control Register

Standard Logical Device

Standard Registers

Special (Vendor-defined)

Logical Device

Configuration Registers

Page 107

Bank Select

Banks (One per Logical Device)

Figure 5-3. Structure of the Standard

Configuration Register File

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Write accesses to unimplemented registers (i.e., accessing the Data register while the Index register points to a nonexisting register or the LDN is 07h or higher than 08h), are ignored and a read returns 00h on all addresses except for 74h and 75h (DMA configuration registers) which returns 04h (indicating no DMA channel is active). The configuration registers are accessible immediately after reset.

5.3.3 Default Configuration Setup

The device has four reset types:

Software Reset

This reset is generated by bit 1 of the SIOCF1 register, which resets all logical devices. A software reset also resets most bits in the SIO Configuration and Control registers (see Section 5.4.1 on page 103 for the bits not affected). This reset does not affect register bits that are locked for write access.

Hardware Reset

This reset is activated by the system reset signal. This resets all logical devices, with the exception of the RTC and the SWC, and all SIO Configuration and Control registers, with the exception of the SIOCF2 register. It also resets all SuperI/O control and configuration registers, except for those that are battery-backed.

Power-Up Reset

This reset is activated when either VSB or V on after both have been off. VPP is an internal voltage which is a combination of V

and V

. VPP is taken from

BAT

VSB if VSB is greater than the minimum (Min) value defined in Section 9.1.4 "Operating Conditions" on page 370; otherwise, V

is used as the VPP source. This reset resets

BAT

all registers whose values are retained by V

VSB Power-Up Reset

This is an internally generated reset that resets the SWC, excluding those SWC registers whose values are retained

. This reset is activated after VSB is powered up.

by V

The SIO module wakes up with the default setup, as follows:

BAT

PP.

is powered

• When a hardware reset occurs:

— The configuration base address is 2Eh, 15Ch or

None, according to the IO_SIOCFG_IN bit values, as shown in Table 5-1 on page 98.

— All Logical devices are disabled, with the exception of

the RTC and the SWC, which remains functional but whose registers cannot be accessed.

• When either a hardware or a software reset occurs:

— The legacy devices are assigned with their legacy

system resource allocation.

— The AMD proprietary functions are not assigned with

any default resources and the default values of their base addresses are all 00h.

5.3.4 Address Decoding

A full 16-bit address decoding is applied when accessing the configuration I/O space, as well as the registers of the functional blocks. However, the number of configurable bits in the base address registers vary for each device.

The lower 1, 2, 3 or 4 address bits are decoded within the functional block to determine the offset of the accessed register, within the device’s I/O range of 2, 4, 8 or 16 bytes, respectively. The rest of the bits are matched with the base address register to decode the entire I/O range allocated to the device. Therefore the lower bits of the base address register are forced to 0 (RO), and the base address is forced to be 2, 4, 8 or 16 byte aligned, according to the size of the I/O range.

The base address of the RTC, Serial Port 1, Serial Port 2, and the Infrared Communication Port are limited to the I/O address range of 00h to 7Fxh only (bits [15:11] are forced to 0). The Parallel Port base address is limited to the I/O address range of 00h to 3F8h. The addresses of the nonlegacy devices are configurable within the full 16-bit address range (up to FFFxh).

In some special cases, other address bits are used for internal decoding (such as 10 in the Parallel Port). For more details, please see the detailed description of the base address register for each specific logical device.

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5.4 Standard Configuration Registers

As illustrated in Figure 5-4, the Standard Configuration registers are broadly divided into two categories: SIO Control and Configuration registers and Logical Device Control and Configuration registers (one per logical device, some are optional).

SIO Control and Configuration Registers

The only PnP control register in the SIO module is the Logical Device Number register at Index 07h. All other standard PnP control registers are associated with PnP protocol for ISA add-in cards, and are not supported by the SIO module.

The SIO Configuration registers at Index 20h-27h are mainly used for part identification. (See Section 5.4.1 "SIO Control and Configuration Registers" on page 103 for further details.)

Logical Device Control and Configuration Registers

A subset of these registers is implemented for each logical device. (See Table 5-2 on page 98 for LDN assignment and Section 5.4.2 "Logical Device Control and Configuration" on page 104 for register details.)

Logical Device Control Register (Index 30h): The only implemented Logical Device Control register is the Activate register at Index 30. Bit 0 of the Activate register and bit 0 of the SIO Configuration 1 register (Global Device Enable bit) control the activation of the associated function block

Index Register Name

07h Logical Device Number

20h SIO ID

SIO Control and

Configuration Registers

Logical Device Control and Configuration Registers one per logical device

(some are optional)

21h SIO Configuration 1

22h SIO Configuration 2

27h SIO Revision ID

2Eh Reserved exclusively for AMD use

30h Logical Device Control (Activate)

60h I/O Port Base Address Descriptor 0 Bits [15:8]

61h I/O Port Base Address Descriptor 0 Bits [7:0]

62h I/O Port Base Address Descriptor 1 Bits [15:8]

63h I/O Port Base Address Descriptor 1 Bits [7:0]

70h Interrupt Number Select

71h Interrupt Type Select

74h DMA Channel Select 0

75h DMA Channel Select 1

F0h Device Specific Logical Device Configuration 1

F1h Device Specific Logical Device Configuration 2

F2h Device Specific Logical Device Configuration 3

F3h Device Specific Logical Device Configuration 4

(except for the RTC and the SWC). Activation of the block enables access to the block’s registers, and attaches its system resources, which are unused as long as the block is not activated. Activation of the block may also result in other effects (e.g., clock enable and active signaling), for certain functions.

Standard Logical Device Configuration Registers (Index 60h-75h): These registers are used to manage the

resource allocation to the functional blocks. The I/O port base address descriptor 0 is a pair of registers at Index 60h-61h, holding the (first or only) 16-bit base address for the register set of the functional block. An optional second base-address (descriptor 1) at Index 62h-63h is used for devices with more than one continuous register set. Interrupt Number Select (Index 70h) and Interrupt Type Select (Index 71h) allocate an IRQ line to the block and control its type. DMA Channel Select 0 (Index 74h) allocates a DMA channel to the block, where applicable. DMA Channel Select 1 (Index 75h) allocates a second DMA channel, where applicable.

Special Logical Device Configuration Registers (F0hF3h): The vendor-defined registers, starting at Index F0h

are used to control function-specific parameters such as operation modes, power saving modes, pin TRI-STATE, clock rate selection, and non-standard extensions to generic functions.

Figure 5-4. Standard Configuration Registers Map

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Table 5-3 provides the bit definitions for the Standard Configuration registers.

• All reserved bits return 0 on reads, except where noted otherwise. They must not be modified as such modifica-

write to prevent the values of reserved bits from being changed during write.

• Write only registers should not use read-modify-write during updates.

tion may cause unpredictable results. Use read-modify-

Table 5-3. Standard Configuration Registers

Bit Description

Index 07h Logical Device Number (R/W)

This register selects the current logical device. See Table 5-2 for valid numbers. All other values are reserved.

7:0 Logical Device number.

Index 20h-2Fh SIO Configuration (R/W)

SIO configuration and ID registers. See Section 5.4.1 "SIO Control and Configuration Registers" on page 103 for register/bit details.

Index 30h Activate (R/W)

7:1 Reserved.

0 Logical Device Activation Control.

0: Disable.

1: Enable.

Index 60h I/O Port Base Address Bits [15:8] Descriptor 0 (R/W)

7:0 Descriptor 0 A[15:8]. Selects I/O lower limit address bits [15:8] for I/O Descriptor 0.

Index 61h I/O Port Base Address Bits [7:0] Descriptor 0 (R/W)

7:0 Descriptor 0 A[7:0]. Selects I/O lower limit address bits [7:0] for I/O Descriptor 0.

Index 62h I/O Port Base Address Bits [15:8] Descriptor 1 (R/W)

7:0 Descriptor 1 A[15:8]. Selects I/O lower limit address bits [15:8] for I/O Descriptor 1.

Index 63h I/O Port Base Address Bits [7:0] Descriptor 1 (R/W)

7:0 Descriptor 1 A[7:0]. Selects I/O lower limit address bits [7:0] for I/O Descriptor 1.

Index 70h Interrupt Number (R/W)

7:4 Reserved.

3:0 Interrupt Number. These bits select the interrupt number. A value of 1 selects IRQ1, a value of 2 selects IRQ2, etc. (up to

Index 71h Interrupt Request Type Select (R/W)

Selects the type and level of the interrupt request number selected in the previous register.

7:2 Reserved.

Index 74h DMA Channel Select 0 (R/W)

Selects selected DMA channel for DMA 0 of the logical device (0 - the first DMA channel in case of using more than one DMA channel).

7:3 Reserved.

2:0 DMA 0 Channel Select. This bit field selects the DMA channel for DMA 0.

IRQ12).

Note: IRQ0 is not a valid interrupt selection.

1 Interrupt Level Requested. Level of interrupt request selected in previous register.

0: Low polarity.

1: High polarity.

This bit must be set to 1 (high polarity), except for IRQ8#, that must be low polarity.

0 Interrupt Type Requested. Type of interrupt request selected in previous register.

0: Edge.

1: Level.

The valid choices are 0-3, where a value of 0 selects DMA channel 0, 1 selects channel 1, etc.

A value of 4 indicates that no DMA channel is active.

Values 5-7 are reserved.

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Table 5-3. Standard Configuration Registers

Bit Description

Index 75h DMA Channel Select 1 (R/W)

Indicates selected DMA channel for DMA 1 of the logical device (1 - the second DMA channel in case of using more than one DMA channel).

7:3 Reserved.

2:0 DMA 1 Channel Select: This bit field selects the DMA channel for DMA 1.

The valid choices are 0-3, where a value of 0 selects DMA channel 0, 1 selects channel 1, etc.

A value of 4 indicates that no DMA channel is active.

Values 5-7 are reserved.

Index F0h-FEh Logical Device Configuration (R/W)

Special (vendor-defined) configuration options.

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5.4.1 SIO Control and Configuration Registers

Table 5-4 lists the SIO Control and Configuration registers and Table 5-5 provides their bit formats.

Table 5-4. SIO Control and Configuration Register Map

Index Type Name Power Rail Reset Value

20h RO SID. SIO ID V

21h R/W SIOCF1. SIO Configuration 1 V

22h R/W SIOCF2. SIO Configuration 2 V

27h RO SRID. SIO Revision ID V

CORE

F5h

01h

02h

01h

2Eh --- RSVD. Reserved exclusively for AMD use --- ---

Table 5-5. SIO Control and Configuration Registers

Bit Description

Index 20h SIO ID Register - SID (RO) Reset Value: F5h

7:0 Chip ID. Contains the identity number of the module. The SIO module is identified by the value F5h.

Index 21h SIO Configuration 1 Register - SIOCF1 (RW) Reset Value: 01h

7:6 General Purpose Scratch. When bit 5 is set to 1, these bits are RO. After reset, these bits can be read or write. Once

changed to RO, the bits can be changed back to R/W only by a hardware reset.

5 Lock Scratch. This bit controls bits 7 and 6 of this register. Once this bit is set to 1 by software, it can be cleared to 0 only

by a hardware reset.

0: Bits 7 and 6 of this register are R/W bits. (Default)

1: Bits 7 and 6 of this register are RO bits.

4:2 Reserved.

1 SW Reset. Read always returns 0.

0: Ignored. (Default)

1: Resets all devices that are reset by MR (with the exception of the lock bits) and the registers of the SWC.

0 Global Device Enable. This bit controls the function enable of all the logical devices in the SIO module, except the SWC

and the RTC. It allows them to be disabled simultaneously by writing to a single bit.

0: All logical devices in the SIO module are disabled, except the SWC and the RTC.

1: Each logical device is enabled according to its Activate register at Index 30h. (Default)

Index 22h SIO Configuration 2 Register - SIOCF2 (R/W) Reset Value: 02h Note: This register is reset only when V

7 Reserved.

6:4 General Purpose Scratch. Battery-backed.

3:2 Reserved.

1 Reserved.

0 Reserved. (RO)

Index 27h SIO Revision ID Register - SRID (RO) Reset Value: 01h

7:0 SIO Revision ID. (RO) This RO register contains the identity number of the chip revision. SRID is incremented on each revi-

sion.

is first applied.

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5.4.2 Logical Device Control and Configuration

As described in Section 5.3.2 "Banked Logical Device Registers" on page 98, each functional block is associated with a Logical Device Number (LDN). This section provides the register descriptions for each LDN.

5.4.2.1 LDN 00h - Real-Time Clock

Table 5-6 lists the registers which are relevant to configuration of the Real-Time Clock (RTC). Only the last registers (F0h-F3h) are described here (Table 5-7). See Table 5-3 "Standard Configuration Registers" on page 101 for descriptions of the other registers.

The register descriptions in this subsection use the following abbreviations for Type:

• R/W = Read/Write

• R = Read from a specific address returns the

value of a specific register. Write to the same address is to a different register.

•W =Write

• RO = Read Only

• R/W1C = Read/Write 1 to Clear. Writing 1 to a bit

clears it to 0. Writing 0 has no effect.

Table 5-6. Relevant RTC Configuration Registers

Index Type Configuration Register or Action

30h R/W

Activate. When bit 0 is cleared, the registers of this logical device are not accessible.

60h R/W Standard Base Address MSB register. Bits [7:3] (for A[15:11]) are RO, 00000b. 00h

61h R/W Standard Base Address LSB register. Bit 0 (for A0) is RO, 0b. 70h

62h R/W Extended Base Address MSB register. Bits [7:3] (for A[15:11]) are RO, 00000b. 00h

63h R/W Extended Base Address LSB register. Bit 0 (for A0) is RO, 0b. 72h

70h R/W Interrupt Number. 08h

71h R/W Interrupt Type. Bit 1 is R/W; other bits are RO. 00h

74h RO Report no DMA assignment. 04h

75h RO Report no DMA assignment. 04h

F0h R/W RAM Lock register (RLR). 00h

F1h R/W Date of Month Alarm Offset register (DOMAO). Sets index of Date of Month Alarm

F2h R/W Month Alarm Offset register (MONAO). Sets index of Month Alarm register in the

standard base address.

F3h R/W Century Offset register (CENO). Sets index of Century register in the standard base

address.

1. The logical device registers are maintained, and all RTC mechanisms are functional.

Reset Val ue

00h

104 AMD Geode™ SC2200 Processor Data Book

SuperI/O Module

Table 5-7. RTC Configuration Registers

Bit Description

Index F0h RAM Lock Register - RLR (R/W)

When any non-reserved bit in this register is set to 1, it can be cleared only by hardware reset.

7 Block Standard RAM.

0: No effect on Standard RAM access. (Default)

1: Read and write to locations 38h-3Fh of the Standard RAM are blocked, writes ignored, and reads return FFh.

6 Block RAM Write.

0: No effect on RAM access. (Default)

1: Writes to RAM (Standard and Extended) are ignored.

5 Block Extended RAM Write. This bit controls writes to bytes 00h-1Fh of the Extended RAM.

0: No effect on the Extended RAM access. (Default)

1: Writes to bytes 00h-1Fh of the Extended RAM are ignored.

4 Block Extended RAM Read. This bit controls read from bytes 00h-1Fh of the Extended RAM.

0: No effect on Extended RAM access. (Default)

1: Reads to bytes 00h-1Fh of the Extended RAM are ignored.

3 Block Extended RAM. This bit controls access to the Extended RAM 128 bytes.

0: No effect on Extended RAM access. (Default)

1: Read and write to the Extended RAM are blocked: writes are ignored and reads return FFh.

2:0 Reserved.

Index F1h Date Of Month Alarm Register Offset Register - DOMAO (R/W)

7 Reserved.

6:0 Date of Month Alarm Register Offset Value.

Index F2h Month Alarm Register Offset Register - MANAO (R/W)

7 Reserved.

6:0 Month Alarm Register Offset Value.

Index F3h Century Register Offset Register - CENO (R/W)

7 Reserved.

6:0 Century Register Offset Value.

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5.4.2.2 LDN 01h - System Wakeup Control

Table 5-8 lists registers that are relevant to the configura-

described earlier in Table 5-3 "Standard Configuration Registers" on page 101.

tion of System Wakeup Control (SWC). These registers are

Table 5-8. Relevant SWC Registers

Index Type Configuration Register or Action

30h R/W

Activate. When bit 0 is cleared, the registers of this logical device are not accessible.

60h R/W Base Address MSB register. 00h

61h R/W Base Address LSB register. Bits [3:0] (for A[3:0]) are RO, 0000b. 00h

70h R/W Interrupt Number. (For routing the internal PWUREQ signal.) 00h

71h R/W Interrupt Type. Bit 1 is R/W. Other bits are RO. 03h

74h RO Report no DMA assignment. 04h

75h RO Report no DMA assignment. 04h

1. The logical device registers are maintained, and all wakeup detection mechanisms are functional.

Reset Val ue

00h

106 AMD Geode™ SC2200 Processor Data Book

AMD SC2200 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

List of Figures

List of Tables

1.0Overview

1.1 General Description

1.2 Features

2.0Architecture Overview

2.1 GX1 Module

2.1.1 Memory Controller

2.1.2 Fast-PCI Bus

2.1.3 Display

2.2 Video Processor Module

2.2.1 GX1 Module Interface

2.2.2 Video Input Port

2.2.3 Core Logic Module Interface

2.2.4 CRT DAC

2.3 Core Logic Module

2.3.1 Other Interfaces of the Core Logic Module

2.4 SuperI/O Module

2.5 Clock, Timers, and Reset Logic

2.5.1 Reset Logic

2.5.1.1 Power-On Reset

2.5.1.2 System Reset

3.0Signal Definitions

3.1 Ball Assignments

3.2 Strap Options

3.3 Multiplexing Configuration

3.4 Signal Descriptions

3.4.1 System Interface

3.4.2 Memory Interface Signals

3.4.3 Video Port Interface Signals

3.4.4 CRT/TFT Interface Signals

3.4.5 ACCESS.bus Interface Signals

3.4.6 PCI Bus Interface Signals

3.4.7 Sub-ISA Interface Signals

3.4.8 Low Pin Count (LPC) Bus Interface Signals

3.4.9 IDE Interface Signals

3.4.10 Universal Serial Bus (USB) Interface Signals

3.4.11 Serial Ports (UARTs) Interface Signals

3.4.12 Parallel Port Interface Signals

3.4.13 Fast Infrared (IR) Port Interface Signals

3.4.14 AC97 Audio Interface Signals

3.4.15 Power Management Interface Signals

3.4.16 GPIO Interface Signals

3.4.17 Debug Monitoring Interface Signals

3.4.18 JTAG Interface Signals

3.4.19 Test and Measurement Interface Signals

4.0General Configuration Block

4.1 Configuration Block Addresses

4.2 Multiplexing, Interrupt Selection, and Base Address Registers

4.3 WATCHDOG

4.3.1 Functional Description

4.3.1.1 WATCHDOG Timer

4.3.2 WATCHDOG Registers

4.3.2.1 Usage Hints

4.4 High-Resolution Timer

4.4.1 Functional Description

4.4.2 High-Resolution Timer Registers

4.4.2.1 Usage Hints

4.5 Clock Generators and PLLs

4.5.1 27 MHz Crystal Oscillator

4.5.2 GX1 Module Core Clock

4.5.3 Internal Fast-PCI Clock

4.5.4 SuperI/O Clocks

4.5.5 Core Logic Module Clocks

4.5.6 Video Processor Clocks

4.5.7 Clock Registers

5.0SuperI/O Module

5.1 Features

5.2 Module Architecture

5.3 Configuration Structure/Access

5.3.1 Index-Data Register Pair

5.3.2 Banked Logical Device Registers

5.3.3 Default Configuration Setup

5.3.4 Address Decoding

5.4 Standard Configuration Registers

5.4.1 SIO Control and Configuration Registers