User`s manual

ASUS A7N266 User’s Manual 39
3. HARDWARE SETUP
Connectors
3. H/W SETUP
16) Power Supply Connectors (20-pin block ATXPWR)
This connector supplies to an ATX power supply. The plug from the power supply
fits in only one orientation because of the different hole sizes. Find the proper
orientation and push down firmly making sure that the pins are aligned.
IMPORTANT: Make sure that the ATX power supply (minimum recommended
wattage: 230W) can supply at least 10mA on the +5-volt standby lead (+5VSB).
The system may become unstable and may experience difficulty powering up if
the power supply is inadequate. For Wake-On-LAN support, the ATX power
supply must supply at least 720mA +5VSB.
A7N266
0 10 10 1
®
A7N266 ATX Power Connector
+3.3VDC
-12.0VDC
COM
PS_ON#
COM
COM
COM
-5.0VDC
+5.0VDC
+5.0VDC
PWR_OK
+12.0VDC
+3.3VDC
+3.3VDC
COM
+5.0VDC
COM
+5.0VDC
COM
+5VSB
ATXPWR
A7N266
0 10 10 1
®
SMBCLK
Ground
SMBDATA
+5V
1
A7N266 SMBus Connector
SMB
17) SMBus Connector (5-1 pin SMB)
This connector allows you to connect SMBus (System Management Bus) devices.
SMBus devices communicate by means of the SMBus with an SMBus host
and/or other SMBus devices. SMBus is a specific implementation of an I
2
C bus,
a multi-device bus that allows multiple chips to connect to the same bus and
enabling each one to act as a master by initiating data transfer.