Chapter 2
10
IR Connector (IR1)
Select a UART Mode in BIOS's Integrated Peripherals menu the
UART port to support IR/CIR functions. (See section 3-4)
CPU/System Cooling Fan Connectors (FAN1/FAN2/FAN3)
The board's management extension hardware is able to detect
the CPU and system fan speed in rpm (revolutions per minute).
These connectors supports 3-pin cooling fans with minimum
of 4000 RPM. The wiring and plug may vary depending on the
manufacturer. On standard fans, the red is positive (+12V), the
black is ground, and the yellow wire is the rotation signal.
PS/2 Mouse and Keyboard Ports (PT1)
If a PS/2 mouse is used, BIOS will automatically detect and assign
IRQ12 to the PS/2 mouse.
2-4 Main Memory Configuration
The DRAM memory system consists three banks and the memory size ranges from
32~512MBytes
. If you only use one bank it does not matter which one you use and if
you use two or more banks, it does not matter which bank you install first.
DRAM Specifications
DIMM type: 3.3V, 64/72-bit Synchronous DRAM
Module size: Single/double-sided 32/64/128/256/512MBytes
DRAM speed: 7.5/10ns for Synchronous DRAM
Parity: Either parity or non-parity
This mainboard supports 3.3v, unbuffered, 4-clock, SDRAM DIMM only.
Buffered, 5V, or 2-clock SDRAM DIMMs should not be used.
Due to loading anomalies, using DIMM with an 'n x 4' DRAM base on this
mainboard is not recommended. For example, a DIMM that uses sixteen
16Mb x 4 devices should not be used.
Pin
Definition
1
Data
2
No Connect
3
Ground
4
+5V (fused)
5
Clock
6
No Connect
