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2-6 Connectors and pin headers
2-6-1 Connectors
(1) Power Connector (24-pin block) : ATXPWR24P
ATX Power Supply connector. This is a new defined 24-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.
** We recommend that you use an ATX 12V Specification 2.0-compliant power supply unit
(PSU) with a minimum of 350W power rating. This type has 24-pin and 4-pin power plugs.
** If you intend to use a PSU with 20-pin and 4-pin power plugs, make sure that the 20-pin
power plug can provide at least 15A on +12V and the power supply unit has a minimum
power rating of 350W. The system may become unstable or may not boot up if the power is
inadequate.
(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.
ROW1 ROW2
ROW1 ROW2
Pin 1
Pin 1
24-Pin
20-Pin
Pin 1
23
PIN
ROW1
1
3.3V
3.3V
2
3.3V
-12V
3
GND
GND
4
5V
Soft Power On
5
GND
GND
6
5V
GND
7
GND
GND
8
Power OK
-5V
9
+5V (for Soft Logic)
+5V
10
+12V
+5V
11
+12V
+5V
12
+3V
GND
ROW2
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