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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.
Note: Intel® High Definition Audio headers are pin-compatible with AC'97 chassis and connectors.
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For Intel® High Definition Front Panel Audio |
| Pin |
Signal Name |
Description |
| 1 |
PORT 1L |
Analog Port 1 - left channel (Microphone) |
| 2 |
GND |
Ground |
| 3 |
PORT 1R |
Analog Port 1 - right channel (Microphone) |
| 4 |
PRESENCE# |
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 |
| 5 |
PORT 2R |
Analog Port 2 - right channel (Headphone) |
| 6 |
SENSE1_RETURN |
Jack detection return for front panel (JACK1) |
| 7 |
SENSE_SEND |
Jack detection sense line from the Intel® HD Audio CODEC jack detection resistor network |
| 8 |
KEY |
Connector key |
| 9 |
PORT 2L |
Analog Port 2 - left channel (Headphone) |
| 10 |
SENSE2_RETURN |
Jack detection return for front panel (JACK2) | |
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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 |
Left channel audio signal to front panel (headphone drive capable) |
| 10 |
FP_RETURN_L |
Left channel audio signal return from front panel (when headphones unplugged) | |
Additional resources:
This applies to:
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