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AC'97 Audio Front panel pin diagram

 

Now days if you buy new components and build a computer you really do not have to know anything about connecting the motherboard to the case. Everything is now labelled clearly and the wires are usually joined together in order.

Its when you begin to rebuild older computers that we start to run into problems.

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.

 

The reason I have put this information on the internet is for self reference. I especially need this information when I am trying to install a motherboard into an odd computer case that is not suited to it.

 

Note: Intel® High Definition Audio headers are pin-compatible with AC'97 chassis and connectors.

Free Computer Help - Audio pin diagram

  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)
  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)
 

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About the Author

Mitz wrote this article and others for tips4pc.com  Browse for more articles that are written in an easy to understand way. Also see our very popular Video Tutorials page. Watching a video is a very easy way to learn about computers.

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