Asus P4B - Page 51

ASUS P4B motherboard user guide 2-29
Figure 2-38 SMBus Connector
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 I
2
C 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.
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.
Figure 2-39 Internal Audio Connectors
P4B
®
P4B SMBus Connector
SMB
1
SMBCLK
Ground
SMBDATA
+3V
FLOATING
P4B
®
P4B Internal Audio Connectors
MODEM
Modem-Out
Ground
Modem-In
Ground
CD1 (Black)
AUX (White)
Right Audio Channel
Left Audio Channel
Ground Ground