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Chapter 2
ATX 12V Power Supply Connector & Power Switch (POWER Switch)
The power switch (POWER SW) should be connected to a momentary switch. When
powering up your system, first turn on the mechanical switch of the power supply (if one
is provided), then push once the power switch. When powering off the system, you
needn't turn off the mechanical switch, just push once the power switch. P5I945P(G)
series mainboard only support ATX12V power.
Note: please pay attention to orientation and sequence of pins when using 20 pins ATX
power supply connector
POWER SW
Hard Disk LED Connector (HD_LED)
The connector connects to the case's IDE indicator LED indicating the activity status of IDE
hard disk. The connector has an orientation. If one way doesn't work, try the other way.
Reset Switch (RESET)
The connector connects to the case's reset switch. Press the switch once, the system
resets.
Power LED Connector (PWR_LED)
When the system is in S0 status, the LED is on. When the system is in S1 status, the LED
is blink; When the system is in S3(option), S4, S5 status, the LED is off. The connector has
an orientation.
+12V Power Supply Connector
12V 12V
GND GND
ATX Power Supply Connector
+3.3VDC GND
-12VDC
1
+3.3VDC +5VDC
+3.3VDC
GND
POWER
Power
LED
HD LED
R E S E T
POWER LED
HD LED
9
+5VDC
GND
GND
+5VDC
-5V/NC
+5VDC
GND
GND
PS-ON
PWR OK
+12VDC +3.3VDC
+5VDC
5VSB
GND
+12VDC
GND
S W
Reserved
POWER SW
R E S E T
P5I945P(G)
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