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Hardware setup – Asus CUA266 User Manual

Page 37

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ASUS CUA266 User’s Manual

37

3. HARDWARE SETUP

Connectors

3. H/W SETUP

10) Power Supply Connectors (20-pin block ATXPWR)

This connector connects to an ATX 12V 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.

11) 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.

IMPORTANT:

Make sure that the ATX 12V 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.

CUA266 ATX Power Connector

+3.3Volts

-12.0Volts

Ground

Power Supply On

Ground

Ground

Ground

-5.0 Volts

+5.0 Volts

+5.0 Volts

Power Good

+12.0Volts

+3.3 Volts

+3.3 Volts

Ground

+5.0 Volts

Ground

+5.0 Volts

Ground

+5V Standby

CUA266

0

1

0

1

CUA266 SMBus Connector

CUA266

0

1

0

1

SMBCLK

Ground

SMBDA

T

A

+5V

1

SMB