System board layout  

Figure 1: System board layout

Features  

• The flexible design of the motherboard will accept processors operating at speeds up to 800 MHz.
• The memory subsystem is designed to support up to 512 MB of SDRAM (for improved performance) in the form of two DIMM sockets that support 16-128 MB 168-pin 3.3 Volt SDRAM memory modules.
• The motherboard features Intel's 810 chipset with I/O subsystem. Onboard VGA features 11 MB Dynamic Video Memory (DVM).
• Connectors on the motherboard support the PCI expansion slots. The motherboard comes with 3 PCI slots.
• Features such as bus mastering IDE, Windows 98-ready Plug 'N' Play, and glitchless bi-directional audio are all provided by available software.

About the Intel(R) Celeron(TM) Processor with MMX technology

These systems are designed to operate with the Intel Celeron Processor running at speeds up to 800 MHz. The microprocessor implements MMX(TM) technology and maintains full backward compatibility with the 8086, 80286, Intel 386, Intel 486, Pentium(R) processor, and Pentium Pro processors.

The processor, in addition to its expanded data and addressing capabilities, includes the following features:

• Ready for the next generation OverDrive processor
• On-chip numeric co-processor
• 32 KB Level 1 cache (16 KB for data, 16 KB for code)
• 128 KB Pipeline Burst Level 2 cache
• Read and write burst mode bus cycles
• Intel 810 chipset
• Integrated 230 MHz RAMDAC Graphics Controller configured for 8M or 11M of Dymanic Video Memory
• SDRAM memory expandable to 512 Mbytes

Warnings when working with system components  

CAUTION: Make sure to unplug the power supply when adding or removing expansion cards or other system components. Failure to do so may cause severe damage to both the motherboard and expansion.

CAUTION: Electrostatic discharge (ESD) can damage the processor, the disk drives, the expansion boards, and other components. Always observe the following precautions before installing a system component.

1. Do not remove a component from its protective packaging until ready to install it.

2. Wear a wrist-grounding strap and attach it to a metal part of the system unit before handling components. If a wrist strap is not available, maintain contact with the system unit throughout any procedure requiring ESD protection.

CAUTION: Integrated circuits are extremely susceptible to electrostatic discharge. Do not handle ICs unless you are a qualified service technician using tools and techniques that conform to accepted industry practices.

Jumper locations and functions  

There are no jumper blocks to set on this motherboard. Intel Socket 370 Celeron processors have locked frequency multiples and use an external frequency of 66 MHz.

About system memory  

The motherboard has two dual in-line memory module (DIMM) sockets. Minimum memory size is 16 MB; maximum memory size is 512 MB. The BIOS automatically detects memory type, size, and speed.
The motherboard supports the following memory features:

• 168-pin DIMMs with gold-plated contacts
• 66 MHz SDRAM or 100 MHz SDRAM depending on system
• Non-ECC (64-bit) and ECC (72-bit) memory
• 3.3 V memory only
• Single- or double-sided DIMMs

SDRAM

Synchronous DRAM (SDRAM) improves memory performance through memory access that 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.
NOTE: To function properly, SDRAM DIMMs must meet the Intel 4-clock, 66 MHz, unbuffered SDRAM specification for either 64-bit or 72-bit SDRAM.

System memory (DIMM)

This motherboard uses only DIMMs. Sockets are available for 3.3 Volt (power level) unbuffered Synchronous Dynamic Random Access Memory (SDRAM) of 16, 32, 64, 128 MB, or 256 MB.

This chipset does not support ECC. However, ECC memory modules may still be used, but the ECC function will not be available.

The DIMMs must be 3.3V unbuffered for this motherboard. To determine the DIMM type, check the notches on the DIMMs.
NOTE: No hardware or BIOS setup is required after adding or removing memory.

Figure 2: DIMM slot and 168-pin DIMM



1- DIMM Slots
2- 88 pins
3- 60 pins
4- 20 pins
5- DIMM lock
6- Front view

System memory configuration

SDRAM in bank 0	SDRAM in bank 1	Total system memory
Empty	16 MB	16 MB
Empty	32 MB	32 MB
Empty	64 MB	64 MB
Empty	128 MB	128 MB
Empty	256 MB	256 MB
16 MB	Empty	16 MB
16 MB	16 MB	32 MB
16 MB	32 MB	48 MB
16 MB	64 MB	80 MB
16 MB	128 MB	144 MB
16 MB	256 MB	272 MB
32 MB	Empty	32 MB
32 MB	16 MB	48 MB
32 MB	32 MB	64 MB
32 MB	64 MB	96 MB
32 MB	128 MB	160 MB
32 MB	256 MB	288 MB
64 MB	Empty	64 MB
64 MB	16 MB	80 MB
64 MB	32 MB	96 MB
SDRAM in bank 0	SDRAM in bank 1	Total system memory
64 MB	64 MB	128 MB
64 MB	128 MB	192 MB
64 MB	256 MB	320 MB
128 MB	Empty	128 MB
128 MB	16 MB	144 MB
128 MB	32 MB	160 MB
128 MB	64 MB	192 MB
128 MB	128 MB	256 MB
128 MB	256 MB	384 MB
256 MB	16 MB	272 MB
256 MB	32 MB	288 MB
256 MB	64 MB	320 MB
256 MB	128 MB	384 MB
256 MB	256 MB	512 MB

IDE support  

The motherboard provides two independent high performance bus-mastering PCI IDE interfaces capable of supporting PIO Mode 3, Mode 4, and ATAPI devices (e.g., CD-ROM). The system BIOS supports logical block addressing (LBA) and extended cylinder sector head (ECSH) translation modes. IDE device transfer rate and translation modes are automatically detected by the system BIOS.

Usually, programmed I/O operations require a substantial amount of processor bandwidth. However, in multitasking operating systems, the bandwidth freed by bus mastering IDE can be devoted to other tasks while disk transfers are occurring.

Universal Serial Bus (USB) support  

The motherboard features two USB ports that permit the direct connection of two USB peripherals, one to each port. For more than two USB devices, an external hub can be connected to either of the built-in ports. The motherboard fully supports the universal host controller interface (UHCI) and uses software drivers that are UHCI-compatible.

Features of USB include:

• Self-identifying peripherals that can be hot-plugged
• 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 the protocol

Replacing the battery  

The Setup information is stored in CMOS RAM and is backed up by a battery when power to the system is off. The battery also keeps the system clock current. As long as the internal battery remains good and is connected, the clock continues to keep the date and time accurately and the Setup information will remain intact.

WARNING: Danger of explosion if the battery is not correctly replaced

Replace the battery with the same manufacturer's 3V Lithium battery, which is type CR2032. Discard the used battery according to the manufacturer's instructions. The location of the battery on the motherboard can be found in the system board layout (Figure 1).

Connectors  

Power supply connectors

Primary power supply

Pin	Signal name	Pin	Signal name
1	+3.3 V	11	+3.3 V
2	+3.3 V	12	-12 V
3	Ground	13	Ground
4	+5 V	14	PW_ON
5	Ground	15	Ground
6	+5 V	16	Ground
7	Ground	17	Ground
8	PWRGD (Power Good)	18	-5 V
9	+5 VSB (Standby for real-time clock)	19	+5 V
10	+12 V	20	+5 V

Power supply fan connector

Pin	Signal name
1	Rotation
2	+12 V (suspend)
3	Ground

CPU fan connector

Pin	Signal name
1	Rotation
2	+12 V
3	Ground

Front panel connector  

The front panel connector includes headers for the following connections: Power LED, Speaker, Reset switch, Power switch, Sleep switch.
Figure 3: Front panel connectors

1- Keyboard lock
2- Message LED
3- External SMI lead
4- Speaker connector
5- ATX power switch *
6- Hard drive LED
7- Reset switch
8- Power LED

Back panel I/O connectors  

PS/2 keyboard and mouse ports

Pin	Signal name
1	Data
2	No connect
3	Ground
4	+5 Vcc (fused)
5	Clock
6	No connect

USB connectors

Pin	Signal name
1	Power
2	USBP0# (USBP1#)
3	USBP0 (USBP1)
4	Ground

Serial port connector

Pin	Signal name
1	Data Carrier Detect (DCD)
2	Receive Data (RXD)
3	Transmit Data (TXD)
4	Data Terminal Ready (DTR)
5	Ground
6	Data Set Ready (DSR)
7	Request to Send (RTS)
8	Clear to Send (CTS)
9	Ring indicator

Parallel port

Signal name	Pin	Pin	Signal name
STROBE-	1	14	AUTO FEED
Data Bit 0	2	15	ERROR*
Data Bit 1	3	16	INIT*
Data Bit 2	4	17	SELECT IN*
Data Bit 3	5	18	Ground
Data Bit 4	6	19	Ground
Data Bit 5	7	20	Ground
Data Bit 6	8	21	Ground
Data Bit 7	9	22	Ground
ACK*	10	23	Ground
BUSY	11	24	Ground
Error	12	25	Ground
SELECT	13

Peripherals  

IDE connectors

Signal name	Pin	Pin	Signal name
Reset IDE	1	2	Ground
Host Data 7	3
This product was added to our catalog on Wednesday 12 November, 2003.
Price, specification, and availability may change without notice. The company is not responsible for errors in typography and/or photography.
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