8.Internal audio connectors (4-pin CD_IN, AUX) (optional)

These connectors allow you to receive stereo audio input from sound sources such as a CD-ROM, TV tuner, or MPEG card.

Right Audio Channel

Ground

Ground

Left Audio Channel

CD_IN

P4B-MX

P4B-MX Internal Audio Connectors

Figure 2-32 Internal Audio Connectors

Ground

Left Audio Channel Ground Right Audio Channel

AUX

9.System management bus connector (6-pin SMB)

This connector allows you to connect System Management Bus (SMBus) 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.

 

SMB

Ground SMBDATA +5V

 

SMBCLK

 

P4B-MX

 

 

1

 

P4B-MX SMBus Connector

 

Figure 2-33

SMB Connector

 

2-26

Chapter 2: Hardware information