21
Connecting Optional Devices
Refer to the following for information on connecting the mainboard’s optional
devices:
AUDIO1: Front Panel Audio header
This header allows the user to install auxiliary front-oriented microphone and
line-out ports for easier access.
Pin
Signal Name
Function
1
AUD_MIC
Front Panel Microphone input signal
2
AUD_GND
Ground used by Analog Audio Circuits
3
AUD_MIC_BIAS
Microphone Power
4
AUD_VCC
Fi5 V used by Analog Audio Circuits
5
AUD_FPOUT_R
Right Channel Audio signal to Front Panel
6
AUD_RET_R
Right Channel Audio signal to Return from
Front Panel
7
HP_ON
Reserved for future use to control Head-
phone Amplifier
8
KEY
No Pin
9
AUD_FPOUT_L
Left Channel Audio signal to Front Panel
10
AUD_RET_L
Left Channel Audio signal Return from
Front Panel