3.HARDWARE 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

ATXPWR

+3.3VDC +3.3VDC

-12.0VDC +3.3VDC

COM COM

PS_ON# +5.0VDC

COM COM

COM +5.0VDC

COM COM

-5.0VDC PWR_OK

+5.0VDC +5VSB

+5.0VDC +12.0VDC

A7N266 ATX Power Connector

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 I2C 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.

A7N266

1

 

 

SMB

 

1

 

A7N266 SMBus Connector

SMBCLK

Ground SMBDATA +5V

 

 

Connectors

3. H/W SETUP

ASUS A7N266 User’s Manual

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