Asus P4B266-E 8.SMBus connector (6-1pin SMB), 9.Internal audio connectors (4-pinCD1, AUX, MODEM) (optional)

8.SMBus connector (6-1 pin SMB)

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.

P4B266-E

P4B266-E SMBus Connector

SMB

1
FLOATING SMBCLK	Ground SMBDATA +3V

9.Internal audio connectors (4-pin CD1, AUX, MODEM) (optional)

These connectors allow you to receive stereo audio input from sound sources such as a CD-ROM, TV tuner, or MPEG card. The MODEM connector allows the onboard audio to interface with a voice modem card with a similar connector. It also allows the sharing of mono_in (such as a phone) and a mono_out (such as a speaker) between the audio and a voice modem card.

	MODEM	Left Audio Channel
	Modem-In
	Ground	Ground
	Ground	Ground
P4B266-E	Modem-Out	Right Audio Channel

AUX (White) CD(Black)

P4B266-E Internal Audio Connectors

2-32 Chapter 2: Hardware information