12
2-6 Connectors and pin headers
2-6-1 Connectors
(1) Power Connector (20-pin block) : ATXPWR
ATX Power Supply connector. This is a new defined 20-pins connector that usually comes
with ATX case. The ATX Power Supply allows to use soft power on momentary switch that
connect from the front panel switch to 2-pins Power On jumper pole on the motherboard.
When the power switch on the back of the ATX power supply turns on, the full power will
not come into the system board until the front panel switch is momentarily pressed. Press
this switch again will turn off the power to the system board.
PIN
ROW2 ROW1
1 3.3V
3.3V
2 -12V
3.3V
3 GND
GND
4 Soft Power On 5V
5 GND
GND
6 GND
5V
7 GND
GND
8 -5V
Power OK
9 +5V
+5V (for Soft Logic)
10 +5V
+12V
Pin 1
(2)
ATX 12V Power Connector (4-pin block) : ATX12V
This is a new defined 4-pins connector that usually comes with ATX Power Supply. The
ATX Power Supply which fully support Pentium 4 processor must including this connector
for support extra 12V voltage to maintain system power consumption. Without this
connector might cause system unstable because the power supply can not provide sufficient
current for system.
Pin 1
(3) PS/2 Mouse & PS/2 Keyboard Connector: KBMS
The connectors for PS/2 keyboard and PS/2 Mouse.
(4) USB Port connector: USB1, USB
The connectors are 4-pin connector that connect USB devices to the system board.
(5) LAN Port connector: LAN
This connector is standard RJ45 connector for Network
(6) Audio Connector: AUDIO
