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22
Connecting Optional Devices
Refer to the following for information on connecting the motherboard'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
1
2
3
4
5
6
7
8
9
10
Pin
Signal Name
AUD_MIC
Front Panel Microphone input signal
AUD_GND
Ground used by Analog Audio Circuits
AUD_MIC-BIAS
Microphone Power
AUD_VCC
Filtered +5V used by Analog Audio Circuits
AUD_FPOUT_R
Right Channel Audio signal to Front Panel
AUD_RET_R
Right Channel Audio signal to Return from Front Panel
HP_ON
Reserved for future use to control Head-phone Amplifier
KEY
No pin
AUD_FPOUT_L
Left Channel Audio signal to Front Panel
AUD_RET_L
Left Channel Audio signal Return from Front Panel
Installing the Motherboard
Signal Name
Function
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