Asus CUA266 CUA266 User Manual - Page 37

ASUS CUA266 User's Manual, Power Supply Connectors 20-pin block ATXPWR, SMBus Connector 5-1 pin SMB

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3. H/W SETUP Connectors 01 01 01 01 3. HARDWARE 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. 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. +12.0Volts +5V Standby Power Good Ground +5.0 Volts Ground CUA266 +5.0 Volts Ground +3.3 Volts +3.3 Volts CUA266 ATX Power Connector +5.0 Volts +5.0 Volts -5.0 Volts Ground Ground Ground Power Supply On Ground -12.0Volts +3.3Volts 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 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. CUA266 CUA266 SMBus Connector SMB 1 SMBCLK Ground SMBDATA +5V ASUS CUA266 User's Manual 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
SMBDATA
+5V
1
SMB