15
2-6 Connectors, Headers
2-6-1 Connectors
(1) Power Connector (24-pin block) : PW1
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 turned 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 PIN
1
+3.3V
+3.3V
13
2
-12V
+3.3V
14
3
GND
GND
15
4
Soft Power On
5V
16
5
GND
GND
17
6
GND
5V
18
7
GND
GND
19
8
-5V
Power OK
20
9
+5V
+5V (for Soft Logic)
21
10
+5V
+12V
22
11
+ 5V
+12V
23
12 GND
+3.3V
24
Pin 1
(2)
ATX 12V Power Connector (4-pin block) : PW12
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.
Signal Pin Signal
12V 2
1 GND
12V 4
3 GND
Pin 1
