Asus P4B533-V manual Chassis intrusion connector 4-1 pin CHASSIS1, SMBus connector 6-1 pin SMB1

4.Chassis intrusion connector (4-1 pin CHASSIS1)

This lead is for a chassis designed with intrusion detection feature. This requires an external detection mechanism such as a chassis intrusion sensor or microswitch. When you remove any chassis component, the sensor triggers and sends a high-level signal to this lead to record a chassis intrusion event.

By default, the pins labeled “Chassis Signal” and “Ground” are shorted with a jumper cap. If you wish to use the chassis intrusion detection feature, remove the jumper cap from the pins.

P4B533-V

CHASSIS1

+5VSB MB Chassis Signal GND

(Default)

P4B533-V Chassis Alarm Lead

5.SMBus connector (6-1 pin SMB1)

This connector allows you to connect SMBus (System Management Bus) devices. Devices communicate with an SMBus host and/or other SMBus devices using the SMBus interface. SMBus is a specific implementation of an I2C bus, a multi-device bus that allows multiple chips to connect to the same bus and enable each one to act as a master by initiating data transfer.

P4B533-V

P4B533-V SMBus Connector

SMB1

1
FLOATING SMBCLK	Ground SMBDATA +3V

2-26 Chapter 2: Hardware information