Intel LT430TX User Manual

LT430TX ATX Motherboard

Technical Product Specification

April, 1997

Order Number 677032-001

The LT430TX ATX motherboard may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current characterized errata are documented in the LT430TX ATX Motherboard Specification Update.

Revision History

Revision

-001

printed on

recycled paper

Revision History Date

Production Review. 10 April 97

This product specification applies only to standard LT430TX motherboards with BIOS identifier LT430TX0.86A.

Changes to this specification will be published in the LT430TX Motherboard Specification Update before being incorporated into a revision of this document.

Information in this document is provided in connection with Intel products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Intel’s Terms and Conditions of Sale for such products, Intel assumes no liability whatsoever, and Intel disclaims any express or implied warranty, relating to sale and/or use of Intel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Intel products are not intended for use in medical, life saving, or life sustaining applications.

Intel retains the right to make changes to specifications and product descriptions at any time, without notice. The LT430TX motherboard may contain design defects or errors known as errata which may cause the product to deviate from

published specifications. Current characterized errata are available on request. Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your product order.

†

Third-party brands and names are the property of their respective owners.

Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be obtained from:

Intel Corporation P.O. Box 7641 Mt. Prospect, IL 60056-7641

or call in North America 1-800-879-4683, Europe 44-0-1793-431-155, France 44-0-1793-421-777, Germany 44-0-1793-421-333, other Countries 708-296-9333.

1 Motherboard Description

1.1 Overview......................................................................................................................7

1.2 Motherboard Manufacturing Options ...........................................................................9

1.3 Form Factor ...............................................................................................................10

1.4 I/O Shield...................................................................................................................11

1.5 Microprocessor ..........................................................................................................12

1.5.1 Microprocessor Upgrade .............................................................................12

1.6 Memory......................................................................................................................13

1.6.1 Main Memory...............................................................................................13

1.6.2 Second Level Cache ...................................................................................1 4

1.7 Chipset.......................................................................................................................14

1.7.1 430TX System Controller (MTXC)...............................................................14

1.7.2 430TX PCI ISA IDE Xcelerator (PIIX4)........................................................15

1.7.3 Universal Serial Bus (USB) Support............................................................16

1.7.4 IDE Support.................................................................................................16

1.8 Super I/O Controller...................................................................................................17

1.8.1 Serial Ports..................................................................................................18

1.8.2 Parallel Port.................................................................................................18

1.8.3 Floppy Controller.........................................................................................18

1.8.4 Keyboard and Mouse Interface ...................................................................18

1.8.5 Infrared Support ..........................................................................................19

1.9 Management Extension Component..........................................................................19

1.10 Wake on LAN Header................................................................................................19

1.11 Graphics Subsystem..................................................................................................20

1.11.1 Graphics Controller......................................................................................20

1.11.2 VESA/ATI Multimedia Channel Connector ..................................................21

1.12 Audio Subsystem.......................................................................................................21

1.12.1 Yamaha OPL4-ML.......................................................................................22

1.12.2 Audio Drivers and Utilities............................................................................22

1.12.3 Audio Connectors........................................................................................22

1.12.4 CD-ROM Audio Connector..........................................................................22

1.13 Motherboard Connectors...........................................................................................23

1.13.1 Power Supply Connector.............................................................................28

1.13.2 Front Panel Connectors...............................................................................29

1.13.3 Back Panel Connectors...............................................................................32

1.14 Add-in Board Expansion Connectors.........................................................................35

1.15 Jumper Settings.........................................................................................................38

1.15.1 Processor Configuration (J9C1-C, D)..........................................................39

1.15.2 Password Clear (J9C1-A)............................................................................ 40

1.15.3 Clear CMOS (J9C1-A)................................................................................. 40

1.15.4 BIOS Setup Access (J9C1-B)......................................................................40

1.15.5 BIOS Recovery (J8A1) ................................................................................40

1.15.6 Processor Voltage (J6M2)...........................................................................40

iii

Contents

1.16 Reliability ...................................................................................................................41

1.17 Environmental............................................................................................................41

1.18 Power Consumption...................................................................................................41

1.18.1 Power Supply Considerations......................................................................42

1.19 Regulatory Compliance..............................................................................................42

1.19.1 Safety..........................................................................................................42

1.19.2 EMI..............................................................................................................4 3

1.19.3 Product Certification Markings.....................................................................43

2 Motherboard Resources

2.1 Memory Map..............................................................................................................45

2.2 DMA Channels...........................................................................................................45

2.3 I/O Map......................................................................................................................46

2.4 PCI Configuration Space Map ...................................................................................48

2.5 Interrupts....................................................................................................................48

2.6 PCI Interrupt Routing Map.........................................................................................49

3 BIOS and Setup Program

3.1 Introduction................................................................................................................51

3.1.1 BIOS Flash Memory Organization...............................................................51

3.1.2 BIOS Upgrades ...........................................................................................51

3.1.3 Plug and Play: PCI Auto-configuration .......................................................52

3.1.4 PCI IDE Support..........................................................................................52

3.1.5 ISA Plug and Play .......................................................................................53

3.1.6 ISA Legacy Devices ....................................................................................53

3.1.7 Desktop Management Interface ..................................................................53

3.1.8 Advanced Power Management ...................................................................54

3.1.9 Language Support.......................................................................................54

3.1.10 Boot Options................................................................................................54

3.1.11 OEM Logo or Scan Area .............................................................................55

3.1.12 USB Support ...............................................................................................55

3.1.13 BIOS Setup Access Jumper........................................................................5 5

3.1.14 Recovering BIOS Data................................................................................55

3.2 BIOS Setup Program................................................................................................. 56

3.2.1 Overview of the Setup Menu Screens.........................................................56

3.2.2 Main Menu...................................................................................................57

3.2.3 Primary/Secondary IDE Master/Slave Configuration Submenus.................58

3.2.4 Advanced Menu ..........................................................................................60

3.2.5 Security Menu..............................................................................................64

3.2.6 Power Menu ................................................................................................65

3.2.7 Boot Menu...................................................................................................6 5

3.2.8 Exit Menu ....................................................................................................67

4 Error Messages

4.1 BIOS Error Messages................................................................................................69

4.2 Port 80h POST Codes...............................................................................................71

LT430TX ATX Motherboard Technical Product Specification

5 Specifications and Online Support

5.1 Specifications.............................................................................................................77

5.2 Online Support...........................................................................................................78

Figures

1. Motherboard Components...........................................................................................8

2. Motherboard Dimensions...........................................................................................10

3. Back Panel I/O Shield Dimensions ............................................................................11

4. Motherboard Connectors...........................................................................................23

5. Front Panel I/O Connectors.......................................................................................29

6. Back Panel I/O Connectors........................................................................................32

7. Jumper Locations ......................................................................................................38

Tables

1. ATI-264GT Rage II+ Maximum Refresh Rates at Different Resolutions....................21

2. Optional CD-ROM Audio Connector (J2G2) ..............................................................24

3. Optional ATAPI Audio Connector (J2G1)...................................................................24

4. Optional Line-In Audio Input Connector (J2H3).........................................................24

5. Optional Telephony Connector (J2H4).......................................................................24

6. Serial Port 2 Header (J2J1) .......................................................................................24

7. CPU Fan Connector (J6M1).......................................................................................25

8. Optional Alternate CPU Fan Connector (J6M1).........................................................25

9. Optional Wake on LAN Header (J6J1).......................................................................25

10. Floppy Drive Connector (J7L2)..................................................................................25

11. GPIO Header (J9A1)..................................................................................................26

12. PCI IDE Connectors (J9H1, J10H1)...........................................................................26

13. Chassis Fan Connector (J9A2)..................................................................................2 6

14. Optional VESA/ATI Multimedia Channel Connector (J5F1)....................................... 27

15. Power Supply Connector (J7L1)................................................................................28

16. Front Panel I/O Connectors.......................................................................................30

17. PS/2

18. USB Connectors........................................................................................................33

19. Parallel Port Connector..............................................................................................33

20. Serial Port 1 Connector..............................................................................................33

21. Optional VGA Video Monitor Connector ....................................................................34

22. Optional MIDI / Game Port Connector.......................................................................34

23. PCI Bus Connectors ..................................................................................................35

24. ISA Bus Connectors ..................................................................................................36

25. Jumper Settings.........................................................................................................39

26. Jumper Settings for Processor and Bus Frequencies................................................3 9

27. Motherboard Environmental Specifications................................................................41

28. DC Voltage ................................................................................................................41

29. Power Usage for a Static Windows

30. Memory Map..............................................................................................................45

†

Keyboard and Mouse Connectors...................................................................33

†

95 Desktop .......................................................42

Contents

31. DMA Channels...........................................................................................................45

32. I/O Map......................................................................................................................46

33. PCI Configuration Space Map ...................................................................................48

34. Interrupts....................................................................................................................48

35. PCI Interrupt Routing Map.........................................................................................49

36. Flash Memory Organization.......................................................................................5 1

37. Recommendations for Configuring an ATAPI Device ................................................52

38. Overview of the Setup Menu Screens .......................................................................56

39. BIOS Error Messages................................................................................................69

40. Port 80h Codes..........................................................................................................71

41. Compliance with Specifications..................................................................................77

1 Motherboard Description

1.1 Overview

The LT430TX motherboard supports Pentium® processors and Pentium processors with MMX technology. The motherboard features:

• ATX form factor

• Socket 7 Pentium OverDrive Main Memory

• Two 168-pin DIMM sockets

• Support for up to 256 MB of:  extended data out (EDO) memory  unbuffered 4-clock synchronous DRAM (SDRAM) memory

• Up to 64 MB of main memory cacheable

Second Level Cache Memory

• 512 KB pipeline burst static RAM (PBSRAM) soldered to the motherboard

• Optional 256 KB pipeline burst static RAM (PBSRAM) soldered to the motherboard

processor socket

Chipset and PCI/IDE Interface

• Intel 82430TX PCIset

• Integrated PCI bus mastering controller

• Two fast IDE interfaces

• Support for up to four IDE drives or devices

• Support for LS-120 removable media IDE drives

• Support for Ultra DMA - 33 drives

I/O Features

• PC87307VUL I/O controller

• Integrates standard I/O functions: floppy drive interface, one multimode parallel port, two

FIFO serial ports, keyboard and mouse controller, IrDA

• Support for two Universal Serial Bus (USB) interfaces

• Expansion Slots

Standard version (without video option):

 Three PCI  Two ISA  One shared PCI/ISA

With optional video subsystem:

 Three PCI  Three ISA

†

-compatible interface

Motherboard Description

Audio Subsystem

• Optional Yamaha OPL3-SA3 3-D audio codec soldered to the motherboard

• Optional OPL4-ML wavetable synthesizer soldered to the motherboard

Video Subsystem

• Optional ATI†-264GT Rage II+ 3-D graphics controller

• Optional VESA

†

/ATI Multimedia Channel connector

Other features

• Plug and Play compatible

• Support for Advanced Power Management

Software drivers and utilities are available from Intel.

HH GG

EE DD

Sec.

Pri.

W T

Y V R

UXBB ZCC

FBA

H I

J K

L M

N O P

OM06162

Figure 1. Motherboard Components

LT430TX ATX Motherboard Technical Product Specification

A Optional Yamaha OPL3-SA3 audio codec S IDE connectors B Optional Yamaha OPL4-ML component T Battery

†

C Optional Wavetable upgrade header U Optional Wake on LAN D Optional CD-ROM audio connectors V Optional ATI-264GT Rage II+ graphics controller E Optional Line-in audio input connector W Front panel header F Optional Telephony connector X Optional Wavetable daughter card headers G Back panel I/O connectors Y Optional Management Extension component

(LM78) H Serial port 2 header Z Configuration jumper block I 512 KB PBSRAM cache

(Option of 256 KB)

J Socket 7 Pentium processor socket BB Chassis Fan connector K 82371AB MTXC system controller CC GPIO header L Linear voltage regulator DD 2 MB of SGRAM video memory M CPU Fan connector EE BIOS recovery jumper N Processor voltage jumper FF 2 Mbit TSOP flash memory device O Power connector GG Optional VESA/ATI Multimedia Channel connector P Floppy drive connector HH PCI connectors Q 82430TX PIIX4 PCI ISA IDE Xcelerator II DIMM sockets R PC87307VUL I/O controller JJ ISA connectors

AA Onboard speaker

header

1.2 Motherboard Manufacturing Options

• ATI-264GT Rage II+ 3-D graphics controller with 2 MB of SGRAM

• VESA/ATI Multimedia Channel connector

• Unshrouded floppy disk and IDE controller connectors

• Wake on LAN header

• Management Extension component (LM78)

• Yamaha OPL4-ML component

• Wavetable daughter card headers

• Wavetable upgrade header

• Yamaha OPL3-SA3 audio codec

• 256 KB PBSRAM cache

Motherboard Description

1.3 Form Factor

The motherboard is designed to fit into a standard ATX form factor chassis. Figure 2 illustrates the form factor for the motherboard. The locations of the I/O connectors and mounting holes are in strict compliance with the ATX specification (see Section 5.1).

9.04

8.95

8.05

2.85

0.25

0.0

0.65

0.0

3.10

4.90

Figure 2. Motherboard Dimensions

11.35

11.10

OM06161

LT430TX ATX Motherboard Technical Product Specification

Left-end View

OM05669

Note: Material = 0.010 ±.0.001 Thick Stainless Steel, Half Hard

0.671

1.955

0.597

0.553

1.911

2.184

3.327

4.735

4.899

5.391

5.883

6.533

0.193

0.768

0.295

0.458

1.158

0.666

4.610

1.590

0.200

1.407

0.133

0.120

2.055

2.326

2.023

0.050

0.652

0.395

0.990

0.306 Dia (3)

0.478

1.4 I/O Shield

The back panel I/O shield for the LT430TX motherboard must meet specific dimensional and material requirements. Computers based on this motherboard need the back panel I/O shield in order to pass certification testing. Figure 3 shows the critical dimensions for the I/O shield and indicates the position of each cutout. The example shown is Intel chassis-specific and will not necessarily work with other chassis types.

Figure 3. Back Panel I/O Shield Dimensions

Motherboard Description

OM05908

1.5 Microprocessor

The motherboard supports:

• Pentium processors operating at 90, 100, 120, 133, 150, 166, and 200 MHz

• Pentium processors with MMX technology operating at 166 and 200 MHz

An onboard voltage regulator derives the necessary voltage from the computer’s power supply and enables use of standard or VRE-specified processors. The motherboard automatically detects the type of processor (Pentium processor or Pentium processor with MMX technology).

CAUTION

If you use clips to secure a heat sink to the processor, do not use bail-wire style heat sink clips, such as the type shown in the figure to the right. These clips have been known to damage the motherboard when installed or removed incorrectly.

1.5.1 Microprocessor Upgrade

The motherboard has a 321-pin Socket 7 zero insertion force (ZIF) microprocessor socket. Socket 7 supports upgrades to higher performance Pentium OverDrive processors not supported by Socket 5.

LT430TX ATX Motherboard Technical Product Specification

1.6 Memory

1.6.1 Main Memory

The motherboard has two 168-pin DIMM sockets. Memory can be installed in one or two sockets. Minimum memory size is 8 MB. Maximum memory size is 256 MB. The BIOS automatically detects memory type, size, and speed so no jumper settings are required.

The motherboard supports the following:

• 168-pin 3.3 V DIMMs with tin-plated contacts

• 60 and 66 MHz bus speeds

• 60 ns 3.3 V EDO DRAM

• 60 ns unrestricted CAS Latency 2 unbuffered 4-clock 3.3 V SDRAM

• Caching for the first 64 MB of main memory

• 64-bit data path

• Single- or double-sided DIMMs in the following sizes:

DIMM size Type Configuration Technology

8 MB 60 ns EDO 1M x 64 16 Mbit 16 MB 60 ns EDO 2M x 64 16 Mbit 32 MB 60 ns EDO 4M x 64 16 Mbit 64 MB 60 ns EDO 8M x 64 16 Mbit 8 MB CAS Latency 2 SDRAM 1M x 64 16 Mbit 16 MB CAS Latency 2 SDRAM 2M x 64 16 Mbit 32 MB CAS Latency 2 SDRAM 4M x 64 16 Mbit 64 MB CAS Latency 2 SDRAM 8M x 64 64 Mbit 128 MB CAS Latency 2 SDRAM 16M x 64 64 Mbit

Memory type, size, and speed can vary between sockets, so EDO and SDRAM can be installed on the same motherboard. Parity (x 72) DIMMs can be installed but are not recommended for the following reasons:

• The motherboard does not provide parity checking or ECC

• Parity DIMMs cause excessive capacitive loading on memory data and address lines

1.6.1.1 EDO DRAM

EDO DRAM improves memory read performance by holding the memory data valid until the next CAS# falling edge, unlike fast page mode DRAM, which tri-states the memory data when CAS# negates to precharge for the next memory cycle. With EDO DRAM, the CAS# precharge overlaps the data-valid time, which allows CAS# to negate earlier while still satisfying the memory datavalid window.

Motherboard Description

1.6.1.2 SDRAM

Synchronous DRAM (SDRAM) is designed to improve main memory performance. Unlike fast page or EDO DRAM, SDRAM is synchronous with the memory clock. This simplifies the timing design and increases memory speed because all timing is dependent on the number of memory clock cycles. SDRAM DIMM modules should meet the Intel “4-clock 66 MHz 64-bit unbuffered SDRAM DIMM, V. 1.0” specification.

CAUTION

The board does not support SDRAM DIMMs with an n x 4 DRAM base due to loading anomalies. For example, a DIMM that uses sixteen 16 Mbit x 4 devices should not be used.

NOTE

✏

The LT430TX supports unbuffered, 4-clock 3.3 V SDRAM DIMMs only. Buffered, 5 V, or 2-clock SDRAM DIMMs should not be used.

1.6.2 Second Level Cache

The 512 KB direct-mapped write-back L2 cache consists of two 64K x 32 global write enable (GWE) pipeline burst static RAMs (PBSRAMs) and a 32K x 8 external tag SRAM. These devices are soldered to the motherboard.

The 256KB L2 cache substitutes two 32K x 32 PBSRAMs.

1.7 Chipset

The Intel 82430TX PCIset consists of the TX System Controller (MTXC) device and the PCI ISA IDE Xcelerator (PIIX4) device.

1.7.1 430TX System Controller (MTXC)

The MTXC integrates the cache and main memory DRAM control functions and provides bus control to handle transfers between the processor, cache, main memory, and the PCI bus. The MTXC allows PCI masters to achieve full PCI bandwidth by using the snoop ahead feature. For increased system performance the MTXC integrates posted write and read prefetch buffers. The MTXC comes in a 324-pin MBGA package that features:

• Microprocessor interface control

• Integrated L2 write-back cache controller

 Supports pipeline burst SRAM  64 MB maximum DRAM cacheability  Direct mapped organization—write back only  Cache hit read/write cycle timings at 3-1-1-1  Back to back read/write cycles at 3-1-1-1-1-1-1-1

LT430TX ATX Motherboard Technical Product Specification

• Integrated DRAM controller

 8 MB to 256 MB main memory  64-Mbit DRAM/SDRAM technology support  3.3 V EDO and unbuffered synchronous DRAM support  Non-parity (x64) support only

• Fully synchronous minimum latency PCI bus interface

 PCI compliance (see Section 5.1 for compliance level)  30 and 33 MHz bus speeds  PCI to DRAM data throughput at greater than 100 MB/sec  Up to four PCI masters in addition to the PIIX4

• Power management control

 Provides PCI CLKRUN# signal to control memory clock on the PCI bus (on/off)  Internal clock control (gated off if no host or PCI bus activity)

1.7.2 430TX PCI ISA IDE Xcelerator (PIIX4)

The Intel 430TX PCI ISA IDE Xcelerator (PIIX4) is a multifunction PCI device implementing a PCI to ISA bridge, PCI IDE functionality, a Universal Serial Bus (USB) host/hub function, and Enhanced Power Management. The PIIX4 comes in a 324-pin MBGA package that features:

• Multifunction PCI to ISA bridge

 Supports the PCI bus at 30 and 33 MHz  PCI compliant (see Section 5.1 for compliance level)  Full ISA or extended I/O (EIO) bus support

• USB controller

 Two USB ports (see Section 5.1 for compliance level)  Supports legacy keyboard and mouse  Supports UHCI design guide revision 1.1 interface

• Integrated dual-channel enhanced IDE interface

 Support for up to four IDE devices  PIO Mode 4 transfers at up to 14 MB/sec  Supports “Ultra DMA/33” synchronous DMA mode transfers up to 33 MB/sec  Integrated 8 x 32-bit buffer for bus master PCI IDE burst transfers  Bus master mode

• Enhanced DMA controller

 Two 8237-based DMA controllers  Supports PCI DMA with three PC/PCI channels and distributed DMA protocols  Fast type-F DMA for reduced PCI bus usage

• Interrupt controller based on 82C59

 Support for 15 interrupts  Programmable for edge/level sensitivity

Motherboard Description

• Power management logic

 Sleep/resume logic  Supports thermal alarm  Support for Wake On Modem through Ring Indicate input  Support for Wake on LAN through LID input

• Real-Time Clock

 256 byte battery-backed CMOS SRAM  Includes date alarm

• 16-bit counters/timers based on 82C54

1.7.3 Universal Serial Bus (USB) Support

The motherboard features two USB ports. The ports permit the direct connection of two USB peripherals without an external hub. If more devices are required, an external hub can be connected to either of the built-in ports. The motherboard fully supports the standard universal host controller interface (UHCI) and uses standard software drivers that are UHCI-compatible. Features of the USB include:

• Self-identifying, hot pluggable peripherals

• Automatic mapping of function to driver and configuration

• Support for isochronous and asynchronous transfer types over the same set of wires

• Support for up to 127 physical devices

• Guaranteed bandwidth and low latencies appropriate for telephony, audio, and other

applications

• Error handling and fault recovery mechanisms built into protocol

NOTE

✏

Computers that have an unshielded cable attached to the USB port might not meet FCC Class B requirements, even if no device or a low speed USB device is attached to the cable. Use shielded cable that meets the requirements for full speed devices.

1.7.4 IDE Support

The motherboard has two independent bus mastering PCI IDE interfaces that support PIO Mode 3, PIO Mode 4, ATA-33 (Ultra DMA-33), and ATAPI (e.g., CD-ROM) devices. The BIOS supports Logical Block Addressing (LBA) and Extended Cylinder Head Sector (ECHS) translation modes. IDE device transfer rate and translation mode are automatically detected by the BIOS.

Normally, programmed I/O operations require a substantial amount of processor bandwidth; however, in multi-tasking operating systems like Windows mastering IDE can be devoted to other tasks while disk transfers are occurring.

†

95, the bandwidth freed by bus

LT430TX ATX Motherboard Technical Product Specification

1.7.4.1 LS-120 Support

LS-120 MB Diskette technology enables users to store 120 MB of data on a single, 3.5-inch removable diskette. LS-120 technology is backward (both read and write) compatible with

1.44 MB and 720 KB DOS-formatted diskettes and is supported by Windows 95 and

†

Windows NT

operating systems.

The LT430TX motherboard allows connection of an LS-120 compatible drive and a standard

3.5-inch diskette drive. The LS-120 drive can be configured as a boot device, if selected in the BIOS setup utility.

NOTE

✏

If you connect an LS-120 drive to an IDE connector and configure it as the "A" drive and configure a standard 3.5-inch floppy as a "B" drive, the standard floppy must be connected to the floppy drive cable's "A" connector (the connector at the end of the cable).

1.8 Super I/O Controller

The PC87307VUL Super I/O Controller from National Semiconductor is an ISA Plug and Play compatible (see Section 5.1 for compliance level), multifunction I/O device that provides the following features:

• Serial ports:

 Two 16450/16550A-software compatible UARTs  Send/receive 16-byte FIFO  Four 8-bit DMA options for the UART with Slow Infrared Support (USI)  Ring indicator support for both serial ports

• Multimode bidirectional parallel port

 Standard mode, IBM

†

and Centronics† compatible

 Enhanced Parallel Port (EPP) mode with BIOS and driver support  High-speed Extended Capabilities Port (ECP) mode

• Floppy disk controller

 DP8473 and N82077 compatible  16 byte FIFO  PS/2

†

diagnostic register support

 CMOS disk input and output logic  High performance digital data separator (DDS)  PC-AT

†

and PS/2 drive mode support

• Keyboard and mouse controller

 Industry standard 8042A compatible  General purpose microcontroller  8 bit internal data bus

• Support for an IrDA and Consumer IR-compliant infrared interface

By default, the I/O controller interfaces are automatically configured during boot up. The I/O controller can also be manually configured in the Setup program.

Motherboard Description

1.8.1 Serial Ports

The motherboard has one 9-pin D-Sub serial port connector located on the back panel, and one keyed 10-pin header located on the motherboard for cabling to the back panel. The 16540 and 16550A compatible UARTs support data transfers at speeds up to 921.6 Kbits/sec, while the extended UART mode supports data rates up to 1.5 Mbits/sec.

1.8.2 Parallel Port

The connector for the multimode bidirectional parallel port is a 25-pin D-Sub connector located on the back panel of the motherboard. In the Setup program, there are four options for parallel port operation:

• Compatible (standard mode)

• Bidirectional (PS/2-compatible)

• Bidirectional Enhanced Parallel Port (EPP) (see Section 5.1 for EPP specification compliance

level)

• Bidirectional Extended Capabilities Port (ECP)

1.8.3 Floppy Controller

The I/O controller is software compatible with the DP8473 and N82077 floppy drive controllers and supports both PC-AT and PS/2 modes. In the Setup program, the floppy interface can be configured for the following floppy drive capacities and sizes:

• 360 KB, 5.25-inch

• 1.2 MB, 5.25-inch

• 720 KB, 3.5-inch

• 1.2 MB, 3.5-inch (driver required)

• 1.25/1.44 MB, 3.5-inch

• 2.88 MB, 3.5-inch

1.8.4 Keyboard and Mouse Interface

PS/2 keyboard and mouse connectors are located on the back panel of the motherboard. The 5 V lines to these connectors are protected with a PolySwitch

fuse, reestablishes the connection after an over-current condition is removed. While this device eliminates the possibility of having to replace a fuse, power to the computer should be turned off before connecting or disconnecting a keyboard or mouse.

NOTE

✏

You can plug the mouse and keyboard into either connector.

The keyboard controller contains the Phoenix Technologies which provides the traditional keyboard and mouse control functions, and also supports Power On/Reset password protection. A Power On/Reset password can be specified in the Setup program.

†

circuit that, like a self-healing

†

keyboard and mouse controller code,

LT430TX ATX Motherboard Technical Product Specification

The keyboard controller also supports software reset (<Ctrl><Alt><Del>). This key sequence resets the computer’s software by jumping to the beginning of the BIOS code and running the Power-on Self Test (POST).

1.8.5 Infrared Support

The motherboard has a 6-pin header that supports Hewlett Packard† HSDL-1000 compatible infrared (IR) transmitters/receivers. In the Setup program, Serial Port 2 can be directed to a connected IR device. The connection can be used to transfer files to or from portable devices like laptops, PDAs, and printers. The Infrared Data Association (IrDA) specification supports data transfers of 115 Kbits/sec at a distance of 1 meter. See Section 5.1 for IrDA specification compliance level.

1.8.5.1 Consumer Infrared Support

The motherboard has a dedicated signal pin that supports Consumer Infrared (IR) devices (remote controls). The signal pin supports receive only. Consumer IR devices can be used to control telephony functions and multimedia operations like volume and CD track changes. In this mode, data rates of up to 685.57 Kbits/sec are supported. A software and hardware interface is needed to use this feature.

1.9 Management Extension Component

The optional Management Extension component (National Semiconductor LM78) provides lowcost instrumentation capabilities designed to reduce the total cost of owning a PC when used with LANDesk include:

• An integrated ambient temperature sensor

• Fan speed sensors

• Power supply voltage monitoring to detect levels above or below acceptable values

• Registers for storing POST hardware test results and error codes

• Remote reset capabilities from a remote peer or server through LANDesk Client Manager,

When suggested ratings for temperature, fan speed, or voltage are exceeded, an interrupt is activated. The Management Extension component (LM78) connects to the ISA bus as an 8-bit I/O mapped device.

Client Manager. The hardware implementation is a single-chip ASIC. Features

Version 3.0 and service layers (when available)

Motherboard Description

1.10 Wake on LAN Header

The optional header, at location J6J1, is used to implement the Wake on LAN feature. Connect this header to a PCI LAN adapter that supports the Wake on LAN feature. The adapter monitors network traffic. When the adapter detects a Magic Packet LAN header to wake up the computer. This signal can wake up the computer only when the AC power cord is still plugged into the socket and the computer is turned off. Wake on LAN can be enabled through the Boot menu in the Setup program.

†

, it asserts a signal through the Wake on

CAUTION

The computer’s power supply must provide sufficient +5 VSB current to the LAN adapter; without enough +5 VSB current, the Wake on LAN feature will not function. Check the adapter’s documentation for +5 VSB requirements.

1.11 Graphics Subsystem

The optional onboard graphics subsystem features the ATI-264GT Rage II+ graphics controller.

1.11.1 Graphics Controller

The optional ATI-264GT Rage II+ provides the following features:

• Drawing coprocessor that operates concurrently with the host processor

• Video coprocessor that enables simultaneous display of 24 bits per pixel (bpp) video and 8 bpp

graphics

†

• VGA

• PCI compliant

• Support for power management

• Support for VESA Display Data Channel (DDC2B)

• Video scaler, color space converter, true color palette

• Triple-clock synthesizer

• Support for ATI multimedia feature connector

• 3-D graphics capability

• PCI Bus Master

1.11.1.1 Video Memory

The motherboard supports 2 MB of 60 ns SGRAM for video memory, soldered to the board. There are no upgrade options for video memory.

and VESA compatibility

LT430TX ATX Motherboard Technical Product Specification

16-bit Color

(64K Colors)

160

1.11.1.2 Resolutions and Refresh Rates

Table 1. ATI-264GT Rage II+ Maximum Refresh Rates at Different Resolutions

2 MB Memory Maximum Refresh Rate (Hz) At:

4-bit Color

Resolution

640 x 480 160 160 800 x 600 160 160 1024 x 768 160 160 1152 x 864 160 160 1280 x 1024 160 160

(16 Colors)

8-bit Color (256 Colors)

24-bit Color (16M Colors)

160 160 not supported not supported not supported

1.11.1.3 Graphics Drivers and Utilities

Graphics drivers and common graphics utilities are available for Windows 3.x, Windows 95, and Windows NT. Drivers and utilities are available from Intel’s World Wide Web site (see Section 5.2).

1.11.2 VESA/ATI Multimedia Channel Connector

The motherboard has an optional 40-pin VESA/ATI Multimedia Channel connector that uses 26 pins for the VESA standard bus and 12 pins for the ATI Enhanced Visual Architecture bus. The connector features a shared frame buffer interface and a Local Peripheral Bus (LPB) with a bidirectional interface that supports video companion devices like MPEG/live video decoders.

1.12 Audio Subsystem

The optional onboard audio subsystem features the Yamaha OPL† YMF715, a 100-pin SQFP audio chip. It integrates a 16-bit audio codec, OPL3 FM synthesis and its DAC, 3-D enhanced stereo controller, and an interface for MPU-401 and a joystick. The YMF715 provides all the digital audio and analog mixing functions needed for recording and playing sound on personal computers. It features the following:

• Integrated 3-D enhanced stereo controller including all required analog components

• Stereo analog-to-digital and digital-to-analog converters

• Analog mixing, anti-aliasing, and reconstruction filters

• Support for 16-bit address decode

• Line, microphone, mono, and modem inputs

• ADPCM, A-law or µlaw digital audio compression/decompression

• Full digital control of all mixer and volume control functions

• Software switching between rear panel Mic In and Line In connectors

Motherboard Description

• Plug and Play compatibility

• Sound Blaster

†

and Windows Sound System compatibility

• Pin compatible with the Yamaha YMF711 The following table shows the IRQ, DMA channel, and base I/O address options for the audio

subsystem. These options are automatically chosen by the Plug and Play interface, so there are no default settings.

IRQ

Resource

Sound Blaster (DMA playback, DMA shared with Windows Sound System capture)

Windows Sound System (DMA playback)

MPU-401 (IRQ shared with Sound Blaster)

MIDI / Game Port 201h

†

AdLib

(Options)

5 7 9 10 11 5 7 9 10 11

DMA channel (Options)

0 1 3

I/O Address (Options)

220h 240h 220-280h

530h E80h 530-F48h

330h 300h 300-334h

201-211h 388h 388-3F8h

1.12.1 Yamaha OPL4-ML

The optional Yamaha OPL4-ML wavetable is a ROM table containing live instrument sound samples. Wave synthesis results in richer and more realistic sounds then that of FM synthesis.

1.12.2 Audio Drivers and Utilities

Audio software and utilities are available from Intel’s World Wide Web site (see Section 5.2).

1.12.3 Audio Connectors

The board has these optional audio connectors:

• Back panel audio jacks (Line In, Line Out, Mic In)

• CD-ROM audio connector (either standard CD or optional ATAPI styles provided)

• Telephony connector (ATAPI style only)

• Line-in audio input connector (ATAPI style only)

1.12.4 CD-ROM Audio Connector

An optional 1 x 4-pin connector is available for connecting the audio output of an internal CD-ROM connector to the audio subsystem’s mixer. The connector is compatible with most cables supplied with ATAPI CD-ROM headers designed to connect to audio add-in cards.

LT430TX ATX Motherboard Technical Product Specification

1.13 Motherboard Connectors

Figure 4 shows the connectors on the motherboard. The following connectors are optional:

• CD-ROM Audio J2G2

• Line-In Audio J2H3

• Wake on LAN J6J1

• VESA/ATI Multimedia Channel J5F1

VESA/ATI

Multimedia

Channel

(Optional)

J5F1

272528

J9A1

GPIO

ISA Connectors(3)

J4A1, J4B1

J4B2

Chassis

Fan

3 1

J9A2

PCI Connectors(4)

J4C1, J4D1 J4E1, J4E2

J6J1



Wake

on LAN (Optional)

J2G2

CD-ROM

Audio

(Optional)

J2G1

ATAPI

Audio

(Optional)

J2H3

Line-In

Audio

(Optional)

J2H4

Serial Port 2

CPU

Fan

Telephony (Optional)

1 2

J2J1

3 1

J6M1

J7L1

Sec. Pri.

139

J9H1-Secondary

J10H1-Primary

234

1335

IDE(2)

Power

J7L2

Floppy

4020

OM06160

Figure 4. Motherboard Connectors

Motherboard Description

Table 2. Optional CD-ROM Audio

Connector (J2G2)

Pin Signal Name

1 Ground 2 CD audio left channel 3 Ground 4 CD audio right channel

Table 3. Optional ATAPI Audio Connector

(J2G1)

Pin Signal Name

1 CD audio left channel 2 Ground 3 Ground 4 CD audio right channel

Table 4. Optional Line-In Audio Input

Connector (J2H3)

Pin Signal Name

1 Left channel audio in 2 Ground 3 Ground 4 Right channel audio in

Table 5. Optional Telephony Connector

(J2H4)

Pin Signal Name

1 Mono output 2 Ground 3 Ground 4 MIC input

Table 6. Serial Port 2 Header (J2J1)

Pin Signal Name

1 DCD# 3 Serial In 5 Serial Out 7 DTR# 9 Ground

Signal Name

DSR# RTS# CTS# RI# Key

+ 54 hidden pages

Intel LT430TX User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

LT430TX ATX Motherboard

Technical Product Specification

Revision History

Contents

1 Motherboard Description

1.1 Overview

1.2 Motherboard Manufacturing Options

1.3 Form Factor

1.4 I/O Shield

1.5 Microprocessor

1.5.1 Microprocessor Upgrade

1.6 Memory

1.6.1 Main Memory

1.6.2 Second Level Cache

1.7 Chipset

1.7.1 430TX System Controller (MTXC)

1.7.2 430TX PCI ISA IDE Xcelerator (PIIX4)

1.7.3 Universal Serial Bus (USB) Support

1.7.4 IDE Support

1.8 Super I/O Controller

1.8.1 Serial Ports

1.8.2 Parallel Port

1.8.3 Floppy Controller

1.8.4 Keyboard and Mouse Interface

1.8.5 Infrared Support

1.9 Management Extension Component

1.10 Wake on LAN Header

1.11 Graphics Subsystem

1.11.1 Graphics Controller

1.11.2 VESA/ATI Multimedia Channel Connector

1.12 Audio Subsystem

1.12.1 Yamaha OPL4-ML

1.12.2 Audio Drivers and Utilities

1.12.3 Audio Connectors

1.12.4 CD-ROM Audio Connector

1.13 Motherboard Connectors