76 Chapter 5
Connecting Optional Devices
Refer to the following for information on connecting the mainboard’s optional devices:
AUDIO1: Front Panel Audio Connector
This connector 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 Filtered +5V 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 to Return from
Front Panel
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