Please note that in this databook, references to "DVI" and "HDMI" refer to the capability of the TMDS interface, multiplexed on the PCI Express® external graphics interface,
to enable DVI or HDMI™ through passive enabling circuitries. Any statement in this databook on any DVI or HDMI-related functionality must be understood in that context.
This product incorporates copyright protection technology that is protected by U.S. patents and other intellectual property rights. The use of Rovi Corporation's copy protection
technology in the device must be authorized by Rovi Corporation and is intended for home and other limited pay-per-view uses only, unless otherwise authorized in writing by
Rovi Corporation. Reverse engineering or disassembly is prohibited.
This device may only be sold or distributed to: (i) a Rovi Authorized Buyer, (ii) a customer (PMA Customer) who has executed a Proprietary Materials Agreement (PMA) with
Rovi Corporation that is still in effect, (iii) a contract manufacturer approved by Rovi Coporation to purchase this device on behalf of a Rovi Authorized Buyer or a PMA
Customer, or (iv) a distributor who has executed a Rovi-specified distribution agreement with AMD.
Trademarks
AMD, the AMD Arrow logo, AMD Athlon, AMD Sempron, AMD Turion, Cool'n'Quiet, AMD PowerNow!, AMD Radeon, AMD Avivo, AMD HyperMemory, PowerPlay,
PowerShift, AMD PowerXpress, and combinations thereof, are trademarks of Advanced Micro Devices, Inc.
HDMI is a trademark of HDMI Licensing, LLC.
HyperTransport is a licensed trademark of the HyperTransport Technology Consortium.
Microsoft, Windows, Windows Vista, and DirectX are registered trademarks of Microsoft Corporation.
PCI Express and PCIe are registered trademarks of PCI-SIG.
WinBench is a registered trademark of Ziff Davis, Inc.
Other product names used in this publication are for identification purposes only and may be trademarks of their respective companies.
Disclaimer
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.
AMD assumes no liability whatsoever, and disclaims any express or implied warranty, relating to this document including, but not limited to, the implied warranty of
merchantability, fitness for a particular purpose, or infringement of any intellectual property right. AMD shall not be liable for any damage, loss, expense, or claim of loss of
any kind or character (including without limitation direct, indirect, consequential, exemplary, punitive, special, incidental or reliance damages) arising from use of or reliance
on this document. No license, whether express, implied, arising by estoppel, or otherwise, to any intellectual property rights are granted by this publication. Except for AMD
product purchased pursuant to AMD's Standard Terms and Conditions of Sale, and then only as expressly set forth therein, 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.
1.1 Introducing the M690T .......................................................................................................................................................1-1
1.3 M690T Features ..................................................................................................................................................................1-2
1.3.5A-Link Express II Interface..................................................................................................................................1-3
1.3.62D Acceleration Features .....................................................................................................................................1-3
1.3.73D Acceleration Features .....................................................................................................................................1-3
1.3.8Motion Video Acceleration Features....................................................................................................................1-4
1.3.9Multiple Display Features ....................................................................................................................................1-4
1.3.12External Display Support via DVO......................................................................................................................1-6
1.3.13Power Management Features ...............................................................................................................................1-6
1.3.15Test Capability Features .......................................................................................................................................1-7
1.3.16Additional Features ..............................................................................................................................................1-7
1.6.1Branding Diagram for ASIC Revision A11 .........................................................................................................1-8
1.6.2Branding Diagram for ASIC Revision A12 and After .........................................................................................1-8
1.7 Part Number Legend .........................................................................................................................................................1-10
1.8 Production Schedule, OPN, and Part Marking .................................................................................................................1-10
1.9 Conventions and Notations ...............................................................................................................................................1-10
1.9.6Acronyms and Abbreviations .............................................................................................................................1-11
2.3.1LVDS Data Mapping............................................................................................................................................2-6
3.5.11 x 8 Lane Interface for External Graphics ......................................................................................................... 3-6
3.5.2A-Link Express II to Southbridge........................................................................................................................ 3-6
3.5.34 x 1 Lane Interface for General Purpose External Devices .............................................................................. 3-6
3.7 CRT and TV Interface........................................................................................................................................................ 3-7
3.9 DVO Interface for External Display .................................................................................................................................. 3-9
3.10 TMDS Interface Multiplexed on the PCI Express® Graphics Lanes ............................................................................ 3-10
3.11 Power Management Pins................................................................................................................................................3-11
3.13 Power Pins...................................................................................................................................................................... 3-12
3.15 Debug Port Signals......................................................................................................................................................... 3-13
4.1 CPU HyperTransport™ Bus Timing.................................................................................................................................. 4-1
4.7 Power Rail Power Up Sequence......................................................................................................................................... 4-4
4.8 LCD Panel Power Up/Down Timing ................................................................................................................................. 4-5
5.1.1Maximum and Minimum Ratings ........................................................................................................................5-1
5.3 Package Information ...........................................................................................................................................................5-7
5.3.3Board Solder Reflow Process Recommendations ................................................................................................5-9
Chapter 6: Power Management and ACPI
6.1 ACPI Power Management Implementation ........................................................................................................................6-1
6.2 Power Management for the Graphics Controller ................................................................................................................6-2
6.2.1PCI Function Power States...................................................................................................................................6-2
6.2.2PCI Power Management Interface........................................................................................................................6-2
6.2.3Capabilities List Data Structure in PCI Configuration Space ..............................................................................6-2
6.2.7PMC - Power Management Capabilities (Offset = 2) ..........................................................................................6-5
Chapter 7: Testability
7.1 Test Capability Features......................................................................................................................................................7-1
7.2 Test Interface.......................................................................................................................................................................7-1
7.3.1Brief Description of an XOR Tree .......................................................................................................................7-1
7.3.2Description of the XOR Tree for the M690T .......................................................................................................7-2
7.3.3XOR Tree Activation ...........................................................................................................................................7-2
7.3.4XOR Chain for the M690T...................................................................................................................................7-2
7.4.1Brief Description of a VOH/VOL Tree................................................................................................................7-4
7.4.2VOH/VOL Tree Activation..................................................................................................................................7-4
A.1 M690T Pin List Sorted by Ball Reference ........................................................................................................................ 1-2
A.2 M690T Pin List Sorted by Pin Name ................................................................................................................................1-6
B.2 Feature Differences between the M690T and M690E ...................................................................................................... 2-1
B.7 The LVTM Interface in TMDS Mode............................................................................................................................... 2-5
Figure 1-1: M690T Branding Diagram for ASIC Revision A11 .....................................................................................................1-8
Figure 1-2: M690T Branding Diagram for ASIC Revision A12 .....................................................................................................1-9
Figure 1-3: M690T ASIC Part Number Legend ............................................................................................................................1-10
Figure 2-5: Single/Dual Channel 24-bit LVDS Data Transmission Ordering .................................................................................2-6
Figure 2-6: Data Transmission Ordering for the TMDS Interface ..................................................................................................2-9
Figure 4-1: Power Rail Power Up Sequence for the M690T ...........................................................................................................4-4
Figure 4-2.: LCD Panel Power Up/Down Timing ...........................................................................................................................4-5
Figure 5-1: DC Characteristics of the TMDS Interface ...................................................................................................................5-4
Figure 5-2: DC Characteristics of the LVDS Interface ...................................................................................................................5-5
Figure 6-1: Linked List for Capabilities ..........................................................................................................................................6-5
Figure 7-1: An Example of a Generic XOR Tree ............................................................................................................................7-1
Figure 7-2: Sample of a Generic VOH/VOL Tree ...........................................................................................................................7-4
Figure B-1: M690E Branding Diagram for ASIC Revision A12 ....................................................................................................2-1
Figure B-2: M690T and M690E Analog Display Output Signals ...................................................................................................2-2
Figure B-4: Pins for Analog Output on the DVI-I Connector .........................................................................................................2-3
Figure B-6: DC Characteristics of the LVTM Interface in TMDS Mode .......................................................................................2-7
Table 1-2: M690T Planned production Schedule, OPN, and Part Marking ................................................................................. 1-10
Table 1-3: Pin Type Codes ........................................................................................................................................................... 1-11
Table 1-4: Acronyms and Abbreviations ...................................................................................................................................... 1-11
Table 2-2: DDR2 Memory Row and Column Addressing .............................................................................................................2-4
Table 2-3: LVDS 24-bit TFT Single Pixel per Clock (Single Channel) Signal Mapping .............................................................. 2-7
Table 2-4: LVDS 24-bit TFT Dual Pixel per Clock (Dual Channel) Signal Mapping ...................................................................2-8
Table 2-5: Single-Link Signal Mapping for DVI/HDMI™ ......................................................................................................... 2-10
Table 2-6: Dual-Link Signal Mapping for DVI ............................................................................................................................ 2-11
Table 2-7: Support for HDMI™ Packet Type ..............................................................................................................................2-12
Table 3-3: 1 x 8 Lane PCI Express® Interface for External Graphics ........................................................................................... 3-6
Table 3-4: 1 x 4 Lane A-Link Express II Interface for Southbridge .............................................................................................. 3-6
Table 3-5: 4 x 1 Lane PCI Express® Interface for General Purpose External Devices ................................................................. 3-6
Table 3-8: CRT and TV Interface ...................................................................................................................................................3-7
Table 3-16: M690T Debug Port Signals ....................................................................................................................................... 3-13
Table 3-17: Strap Definitions for the M690T ............................................................................................................................... 3-14
Table 3-18: Strap Definition for GPPSB_LINK_CONFIG .......................................................................................................... 3-15
Table 4-1: HTREFCLK Pad (66.66MHz) Timing Parameters ....................................................................................................... 4-1
Table 4-3: Timing Requirements for the LVDS Interface .............................................................................................................. 4-2
Table 4-4: Timing Requirements for the OSCIN Pad ....................................................................................................................4-2
Table 4-5: M690T Power Rail Power Up Sequence Requirements ...............................................................................................4-4
Table 4-6: LCD Power Up/Down Timing ...............................................................................................................................
Table 5-1: Maximum and Minimum Ratings ................................................................................................................................. 5-1
Table 5-2: DC Characteristics for 3.3V TTL Signals .....................................................................................................................5-2
Table 5-3: DC Characteristics for 1.8V TTL Signals .....................................................................................................................5-2
Table 5-4: DC Characteristics for the HTREFCLK Pad (66.66MHz) ............................................................................................ 5-2
Table 5-5: DC Characteristics for the OSCIN Pad (14.3181818MHz) .......................................................................................... 5-2
Table 5-6: DC Characteristics for the DDR2 Interface ..................................................................................................................5-3
Table 5-7: DC Characteristics for the TMDS Interface Multiplexed on the PCI Express® Gfx Lanes ......................................... 5-3
Table 5-8: Electrical Requirements for the LVDS Interface .......................................................................................................... 5-4
Table 6-1: ACPI States Supported by the M690T ..........................................................................................................................6-1
Table 6-2: ACPI Signal Definitions ................................................................................................................................................ 6-1
Table 6-3: Standard PCI Configuration Space Header Type 0 ...................................................................................................... 6-2
Table 6-4: PCI Status Register ....................................................................................................................................................... 6-3
Table 6-9: Next Item Pointer (NEXT_ITEM_PTR) ....................................................................................................................... 6-5
Table 6-10: Power Management Capabilities – PMC .................................................................................................................... 6-5
Table 7-1: Pins on the Test Interface .............................................................................................................................................. 7-1
Table 7-2: Example of an XOR Tree .............................................................................................................................................. 7-2
Table 7-3: M690T XOR Tree ......................................................................................................................................................... 7-2
Table 7-4: Truth Table for the VOH/VOL Tree Outputs ............................................................................................................... 7-4
Table 7-5: M690T VOH/VOL Tree ............................................................................................................................................... 7-5
The M690T is a seventh generation Integrated Graphics Processor (IGP) that integrates a DirectX® 9.0 compliant 2D/3D
graphics core and a system controller in a single chip. It is designed to support the AMD Athlon™ 64, AMD Athlon 64
FX, AMD Athlon 64 X2, AMD Sempron™, and AMD Turion™ 64 processors, including both AM2 and S1 socket CPUs.
The CPUs are supported on both high performance and value platforms.
The M690T integrates an AMD Radeon™ X1270 graphics engine, dual display, a TV encoder, an LVDS interface, an
integrated TMDS controller, and Northbridge functionality in a single BGA package. This high level of integration and
scalability is designed to enable manufacturers to offer enthusiast level capabilities and performance while minimizing
board space and system cost.
Robust and Flexible Core Logic Features
The M690T combines graphics and system logic functions in a single chip using a 21mm-body FCBGA package,
minimizing overall solution area. For optimal system and graphics performance, the M690T supports a high speed
HyperTransport™ interface to the AMD processor, running at a data rate of up to 2GT/s and supporting the new
generation of AM2 and S1 socket processors. The M690T is ideally suited to 64-bit operating systems, and supports
platform configurations with greater than 4GB of system memory. The rich PCI Express
M690T, including support for PCI Express external graphics and up to four other PCI Express peripherals, are
complemented by the advanced I/O features of AMD's SB600 Southbridge.
Support for Windows Vista
Chapter 1
Overview
®
expansion capabilities of
®
The M690T delivers an excellent Windows Vista® experience of any integrated graphics and core logic product for the
AMD platform. It incorporates an AMD Radeon™ X700-based graphics core, which provides 3D rendering power to
generate the Windows Vista desktop even under demanding circumstances. In addition, dedicated hardware acceleration
is provided for key new Windows Vista features such as ClearType. This AMD Radeon X700-based graphics technology
also enables great 3D application performance through SmartShader HD, SmoothVision HD, and 3Dc technologies.
Multimedia Capabilities
The M690T incorporates the innovative AMD Avivo™* display architecture, providing users with excellent visual
quality. Advanced scaling and color correction capabilities, along with precision through the entire display pipeline,
ensure an optimal image on CRT monitors, LCD panels, and any other display devices. A TV encoder provides superior
quality, and a TMDS interface, configurable to support DVI/HDMI™ and HDCP, allows compatibility with modern high
definition televisions.
*Note: AMD Avivo™ is a technology platform that includes a broad set of capabilities offered by certain AMD Radeon
products. Full enablement of some AMD Avivo capabilities may require complementary products.
Low Power Consumption and Industry Leading Power Management
The M690T is manufactured using a power efficient 80nm technology, and it supports a wide range of industry standards
and proprietary power management features. In addition to comprehensive support for the ACPI specification and AMD
features such as AMD PowerNow!™, the PowerPlay™ technology (enhanced with new adaptive frame buffer
compression and PowerShift™ features) minimizes the M690T's power consumption by adjusting graphics core
performance and core voltage to the task and usage environment.
Software Compatibility
The graphics driver for the M690T is compatible with AMD Radeon class graphics controllers from AMD. A single
driver can support multiple graphics configurations across AMD's product lines, including the AMD Radeon family and
the AMD chipset family. In addition, this driver compatibility allows the M690T to benefit immediately from AMD's
software optimization and from the advanced Windows® XP and Windows Vista support available in the AMD Radeon
family drivers.
Note: In some reference documents, the M690T is referred to by its code name "RS690T," which signifies the same
device.
1.2M690E
The M690T and M690E are the same device with respect to their form, fit, and functionally, except for the differences
described in Appendix B, “AMD M690E.” All information in this databook, unless superseded by the information given in
Appendix B, is applicable to the M690E.
1.3M690T Features
1.3.1 CPU HyperTransport™ Interface
•
Supports the mobile and desktop AMD Athlon 64/AMD Athlon 64 FX/AMD Athlon X2/AMD Sempron/AMD
Turion 64 processors, including both AM2 and S1 socket CPUs.
•Supports LDTSTP interface, CPU throttling, and stutter mode.
M690E
1.3.2 Memory Interface
•
Supports an optional dedicated local frame buffer (side-port) of up to 128MB through a 16-bit interface.
•Highly flexible memory architecture allows asymmetric side-port and shared system memory frame buffer sizes.
•Dynamic memory allocation scheme improves performance and reduces power.
•Support for DDR2 system memories up to DDR2-800, with a maximum memory clock speed of 400MHz. Memory
clock is independent of any other clock source and can therefore be set to any frequency equal to or less than
400MHz (DDR2-800), allowing the use of lower speed side-port memories.
•Support for 16Mx16, 32Mx8, 32Mx16, 64Mx8, and 64Mx16 memory devices.
•Asynchronous HyperTransport and memory controller interface speeds.
•Supports DDR SDRAM self refresh mechanism.
•Supports dynamic CKE and ODT for power conservation.
1.3.3 AMD HyperMemory™ Technology
Supports AMD HyperMemory™* technology.
•
* Note: The amount of HyperMemory available includes both dedicated and shared memory and is determined by various
factors. For details, please refer to the product advisory numbered PA_IGPGenC5, available on AMD’s OEM Resource
Center or from your AMD CSS representative.
1.3.4 PCI Express
•
Compliant with the PCI Express (PCIe®) 1.1a Specification.
®
Interface
•Highly flexible PCIe implementation to suit a variety of platform needs.
•A x8 graphics interface, configurable to any of the following modes of support:
•An external graphics device utilizing all 8 lanes (see section 1.3.11“DVI/HDMI™” on page 1-6 for details).
•A TMDS interface, enabling DVI/HDMI.
•A single x1, x2, x4, or x8 general purpose PCIe link.
•Supports programmable lane reversal for the graphics link to ease motherboard layout when the end device does not
support lane reversal.
•A four-port, x4 PCI Express general purpose interface, configurable to one of the following modes of support:
•Programmable internal spread spectrum controller for the signals.
1.3.11 DVI/HDMI™
•
Supports a TMDS interface, enabling DVI or HDMI*, which is multiplexed on the PCIe external graphics interface
(only available if no external graphics card is attached to the PCIe external graphics interface).
•Supports industry standard EIA-861B video modes including 480p, 720p, and 1080i. For a full list of currently
supported modes, contact your AMD CSS representative. Maximum resolutions supported by various modes are:
•Single-link DVI: 1600x1200 @60Hz with pixel clock at 162 MHz and standard timings; 1920x1200 @60Hz
with pixel clock at 154MHz and reduced blanking timings.
•Dual-link DVI: 2560x1600 @60Hz, with pixel clock at 268 MHz (DVI clock at 134 MHz).
•HDMI: 1080i, with pixel clock at 74MHz.
•HDMI basic audio support at 32, 44.1, and 48 kHz. Supports two-channel uncompressed audio and multi-channel
audio compressed to two channels like 5.1 DTS, AC3, etc, for audio bit rates up to 1.5 Mbits/s. HD Audio device
compatible with Microsoft’s HD audio drivers.
•HD Audio device compatible with Microsoft’s HD audio drivers.
•HDCP support on data stream for single-link transmission, with on-chip key storage.**
Notes: * CEC is not supported.
M690T Features
** HDCP content protection is only available to licensed buyers of the technology and can only be enabled when
connected to an HDCP-capable receiver.
1.3.12 External Display Support via DVO
•
Supports an external display via a DVO port (multiplexed with the side-port memory interface and only available
if side-port memory is not implemented).
1.3.13 Power Management Features
•
Supports ACPI states S1, S3, S4, and S5.
•The chip power management support logic supports four device power states defined for the OnNow Architecture—
On, Standby, Suspend, and Off. Each power state can be achieved by software control bits.
•Hardware controlled intelligent clock gating enables clocks only to active functional blocks, and is completely
transparent to software.
•Dynamic self-refresh for the side-port memory.
•Support for AMD Cool'n'Quiet™ technology via FID/VID change.
•Support for AMD PowerNow!™ technology.
•Clocks to every major functional block are controlled by a unique dynamic clock switching technique that is
completely transparent to the software. By turning off the clock to the block that is idle or not used at that point, the
power consumption is significantly reduced during normal operation.
•Supports AMD PowerExpress™, and PowerPlay™ (enhanced with the new PowerShift™ feature).
•Support dynamic lane reduction for the PCIe interfaces, adjusting lane width according to required bandwidth (not
available on the PCIe graphics link when lane reversal is in effect).
1.3.14 PC Design Guide Compliance
The M690T complies with all relevant Windows Logo Program (WLP) requirements from Microsoft for WHQL
certification.
The following conventions are used throughout this manual.
1.9.1Pin Names
1.9.2Pin Types
Pins are identified by their pin names or ball references. Multiplexed pins assume alternate “functional names” when they
perform their alternate functions, and these “functional names” are given in Chapter 3, “Pin Descriptions and Strap
Options.”
All active-low signals are identified by the suffix ‘#’ in their names (e.g., LDTSTOP#).
The pins are assigned different codes according to their operational characteristics. These codes are listed in Table 1-3.
OtherPin types not included in any of the categories above
1.9.3Numeric Representation
Hexadecimal numbers are appended with “h” (Intel assembly-style notation) whenever there is a risk of ambiguity. Other
numbers are in decimal.
Pins of identical functions but different trailing integers (e.g., “CPU_D0, CPU_D1,... CPU_D7”) are referred to
collectively by specifying their integers in square brackets and with colons (i.e., “CPU_D[7:0]”). A similar short-hand
notation is used to indicate bit occupation in a register. For example, NB_COMMAND[15:10] refers to the bit positions
10 through 15 of the NB_COMMAND register.
1.9.4 Register Field
A field of a register is referred to by the format of [Register Name].[Register.Field]. For example,
“NB_MC_CNTL.DISABLE_BYPASS” is the “DISABLE_BYPASS” field of the register “NB_MC_CNTL.”
1.9.5 Hyperlinks
Phrases or sentences in blue italicfont are hyperlinks to other parts of the manual. Users of the PDF version of this manual
can click on the links to go directly to the referenced sections, tables, or figures.
1.9.6Acronyms and Abbreviations
The following is a list of the acronyms and abbreviations used in this manual.
Table 1-4 Acronyms and Abbreviations
AcronymFull Expression
ACPIAdvanced Configuration and Power Interface
A-Link-E IIA-Link Express II interface between the IGP and the Southbridge.
BGABall Grid Array
BIOS
BISTBuilt In Self Test.
BLTBlit
bppbits per pixel
CECConsumer Electronic Control
CPISCommon Panel Interface Specification
CRTCathode Ray Tube
CSPChip Scale Package
Basic Input Output System. Initialization code stored in a ROM or Flash RAM used to start up a
system or expansion card.
The M690T is designed to interface with the AMD Athlon 64/AMD Athlon 64 FX/AMD Athlon X2/AMD
Sempron/AMD Turion 64 processors, including both AM2 and S1 socket CPUs. This section presents an overview of the
HyperTransport™ interface. For a detailed description of the interface, please refer to the HyperTransport I/O Link
Specification from the HyperTransport Consortium. Figure 2-2, “Host Interface Block Diagram,” illustrates the basic
blocks of the host bus interface of the M690T.
Host Interface
Figure 2-2 Host Interface Block Diagram
The HyperTransport (HT) Interface is a high speed, packet-based link implemented on two unidirectional buses. It is a
point-to-point interface where data can flow both upstream and downstream at the same time. The commands, addresses,
and data travel in packets on the HyperTransport link. Lengths of packets are in multiples of four bytes. The HT link
consists of three parts: the physical layer (PHY), the data link layer, and the protocol/transaction layer. The PHY is the
physical interface between the M690T and the CPU. The data link layer includes the initialization and configuration
sequences, periodic redundancy checks, connect/disconnect sequences, and information packet flow controls. The
protocol layer is responsible for maintaining strict ordering rules defined by the HT protocol.
The M690T HyperTransport bus interface consists of 17 unidirectional differential data/control pairs and two differential
clock pairs in each of the upstream and downstream direction. On power up, the HT link is 8 bits wide and runs at a
default speed of 200MT/s. After negotiation, carried out by the HW and SW together, the link width can be brought up to
16 bits and the interface can run up to 2GT/s. The interface is illustrated in Figure 2-3, “M690T Host Bus Interface
Signals,” on page 2-3. The signal name and direction for each signal is shown with respect to the processor. Please note
that the signal names may be different from those used in the pin listing of the M690T. Detailed descriptions of the signals
are given in section 3.3, “CPU HyperTransport™ Interface‚’ on page 3-5.
In order to significantly decrease system power and increase graphics performance, the M690T provides an optional
side-port memory interface for dedicated frame buffer memory, to be used exclusively for the integrated graphics core.
The side-port memory interface is designed to significantly reduce system power by allowing the CPU to stay in its lowest
power state during periods of inactivity. Screen refreshes are fetched from the side-port memory, and there is no need to
"wake up" the CPU to fetch screen refresh data.
The M690T memory controller operates in 16-bit mode at very high speed (up to DDR2-800), and has a new
programmable interleaved mode that significantly increases the memory bandwidth and reduces data latency to the
integrated graphics core.
2.2.1 DDR2 Memory Interface
Figure 2-4, “M690T Side-port Memory Interface,” on page 2-4, illustrates the side-port memory interface of the M690T.
The M690T memory controller supports up to 128MB of dedicated side-port frame buffer memory. It controls a single
rank of DDR2 devices in 16-bit memory configuration. It supports device sizes of 256, 512, and 1024 Mbit, and device
widths of x8 and x16. Because the memory controller supplies only one chip select signal, only DDR2 devices with one
chip select are supported. A wide range of DDR2 timing parameters, configurations, and loadings are programmable via
the M690T memory controller configuration registers
The memory controller supports DDR2 SDRAM chips in several configurations. These chips are organized in banks,
rows (or pages), and columns. The supported DDR2 components have four or eight banks. Table 2-1 lists the supported
memory components.
Table 2-1 Supported DDR2 Components
DDR2 SDRAM
ConfigMbitsCS Mode Bank Bits Row BitsCol Bits
16Mbits x 16 2564213932
32Mbits x 8 25652131064
32Mbits x 16 512102131064
64Mbits x 8 512621410128
64Mbits x 16 10241131310128
Mbytes
2.2.1.2 Row and Column Addressing
Table 2-2 shows how the physical address P (after taking out the bank bit) is used to provide the row and column
The M690T contains a dual-channel 24-bit LVDS interface. Notice that for designs implementing only a single LVDS
channel, the LOWER channel of the interface should be used.
2.3.1 LVDS Data Mapping
Figure 2-5 below shows the transmission ordering of the LVDS signals on the lower and the upper data channels.
The signal mappings for single and dual channel transmission are shown in Table 2-3 and Table 2-4 respectively.
LVDS Interface
Figure 2-5 Single/Dual Channel 24-bit LVDS Data Transmission Ordering