Asus X900-PI4 User Manual download pdf (Page 34)

34 ASUS P4T User’s Manual

Connectors

3. H/W SETUP

3. HARDWARE SETUP

10) 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.

SMBCLK

Ground

SMBDATA

+5V

P4T SMBus Connector

SMB

P4T

11) Chassis Intrusion Lead (4-1 pin CHASSIS)

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.

P4T Chassis Open Alarm Lead

P4T

+5VSB_MB

Chassis Signal

GND

CHASSIS

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Asus X900-PI4 User Manual Page 34