For AC-97 Front Panel Audio
Pin Signal Name Description
1 MIC :Front panel microphone input signal (biased when supporting stereo microphone)
2 AUD_GND :Ground used by analog
3 MIC_BIAS :Microphone power / additional MIC input for stereo microphone support
4 AUD_GND :Ground used by analog audio circuits
5 FP_OUT_R :Right channel audio signal to front panel (headphone drive capable)
6 FP_RETURN_R :Right channel audio signal return from front panel (when headphones unplugged)
7 AUD_5V :Filtered +5 V used by analog audio circuits
8 KEY :No pin
9 FP_OUT_L eft channel audio signal to front panel (headphone drive capable)
10 FP_RETURN_L eft channel audio signal return from front panel (when headphones unplugged)