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38 ASUS CUC2 User’s Manual
Connectors
3. H/W SETUP
3. HARDWARE SETUP
17) SMB Connector (5-1 pin SMB)
This connector allows you to connect SMBus (System Management Bus) de-
vices. 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, which is a multi-device bus; that is, multiple chips can be connected to
the same bus and each one can act as a master by initiating data transfer.
CUC2
®
SMBCLK
Ground
SMBDATA
+3V
1
CUC2 SMBus Connector
SMB
18) Chassis Intrusion Lead (2-pin ACHA)
This lead is for a chassis designed for chassis intrusion detection. After-market
toggle switches may also be installed to the chassis panel or on any removable
components. Two wires should be available from the chassis to connect to this
lead. When any chassis component is removed, the contact should open and the
motherboard will record a chassis intrusion event. The event can then be pro-
cessed by software such as LDCM. If the chassis intrusion lead is not used, a
jumper cap must be placed over the pins to close the circuit.
CUC2 Chassis Open Alarm Lead
ACHA
CUC2
®