Chapter 2
10
DDR Terminator module
Insert terminator here
CPU/System Cooling Fan Connectors (FAN1/FAN2)
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 memory system consists two DDR DIMMS and two SDRAM DIMMS which can
supports the memory size up to
1GB
per bank
.
If you only use one bank it does not
matter which one you use and if you use two banks, it does not matter which bank you
install first. If you opted to use the DDR instead of the SDRAM, a DDR terminator card
must be inserted into the DIMM2 socket. (See figures below)
DDR SDRAM Specifications
DIMM type:
3.3V, unbuffered, registered, 64/72-bit SDRAM
2.5V, Registered 64/128/256-bit DDR SDRAM
Module size:
Single/double-sided 64/128/256/512MB/1GB
Parity: Either parity or non-parity
Pin
D efinition
1
D ata
2
N o Connec t
3
G round
4
+5V (fused)
5
Cloc k
6
N o Connec t
DDR1
DDR2
Bank1
Bank2
DIMM1
DIMM2
Bank1
Bank2