Front panel audio header pinouts

The analog front panel header design lets OEMs and integrators place audio functionality on the front panel of a PC system via a cabled up front panel dongle. This document describes the header pinout configuration for connecting chassis with Intel High Definition Audio or AC'97 audio cable up.NoteIntel High Definition Audio headers are pin-compatible with AC'97 chassis and connectors.

For Intel High Definition Front Panel AudioPinSignalDescriptionPinSignalDescription

1PORT 1LAnalog Port 1 - left channel (Microphone)2GNDGround

3PORT 1RAnalog Port 1 - right channel (Microphone)4PRESENCE#Active low signal that signals BIOS that an Intel HD Audio dongle is connected to the analog header. PRESENCE# = 0 when an Intel HD Audio dongle is connected

5PORT 2RAnalog Port 2 - right channel (Headphone)6SENSE1_RETURNJack detection return for front panel (JACK1)

7SENSE_SENDJack detection sense line from the Intel HD Audio CODEC jack detection resistor network8KEYNo pin

9PORT 2LAnalog Port 2 - left channel (Headphone)10SENSE2_RETURNJack detection return for front panel (JACK2)

For AC97 Front Panel AudioPinSignalDescriptionPinSignalDescription

1MICFront panel microphone input signal (biased when supporting stereo microphone)2AUD_GNDGround used by analog

3MIC_BIASMicrophone power / additional MIC input for stereo microphone support4AUD_GNDGround used by analog audio circuits

5FP_OUT_RRight channel audio signal to front panel (headphone drive capable)6FP_RETURN_RRight channel audio signal return from front panel (when headphones unplugged)

7AUD_5VFiltered +5 V used by analog audio circuits8KEYNo pin

9FP_OUT_LLeft channel audio signal to front panel (headphone drive capable)10FP_RETURN_LLeft channel audio signal return from front panel (when headphones unplugged)