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Front Panel Audio Header
The front panel audio header shown in Figure 20, A supports both Intel High Definition
(HD) Audio and AC '97 Audio.
Table 7 shows the pin assignments and signal names for HD Audio and Table 8 shows
the pin assignments and signal names for AC '97 Audio.
Table 7. Front Panel Audio Signal Names for Intel HD Audio
Pin
Signal Name
1
PORT 1L (Microphone)
3
PORT 1R (Microphone)
5
PORT 2R (Headphone)
7
SENSE_SEND
9
PORT 2L (Headphone)
Table 8. Front Panel Audio Header Signal Names for AC '97 Audio
Pin
Signal Name
1
MIC
3
MIC_BIAS
5
FP_OUT_R
7
No connect
9
FP_OUT_L
Alternate Front Panel Power LED Header
Figure 20, B shows the location of the alternate front panel power LED header. Pins 1
and 3 of this header duplicate the signals on pins 2 and 4 of the front panel header. If
your chassis has a three-pin power LED cable, connect it to this header. Table 9
shows the pin assignments for the alternate front panel header.
Table 9. Alternate Front Panel Power LED Header Signal Names
Pin
Signal Name
1
Front panel LED+
2
No pin
3
Front panel LED-
Installing and Replacing Desktop Board Components
Pin
Signal Name
2
GND
4
PRESENCE#
6
SENSE1_RETURN
8
KEY (no pin)
10
SENSE2_RETURN
Pin
Signal Name
2
AUD_GND
4
PRESENCE#
6
AUD_GND
8
KEY (no pin)
10
AUD_GND
In/Out
Out
Out
45
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