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Front Panel Audio Header
The front panel audio header shown in Figure 18, A on page 38 supports both Intel HD
Audio and AC'97 Audio. Table 5 shows the pin assignments and signal names for Intel
HD Audio and Table 6 shows the pin assignments and signal names for AC'97 Audio.
Table 5. 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 6. Front Panel Audio Header Signal Names for AC'97 Audio
Pin
Signal Name
1
MIC
3
MIC_BIAS
5
FP_OUT_R
7
AUD_5V
9
FP_OUT_L
Chassis Intrusion Header
Figure 18, B on page 38 shows the location of the chassis intrusion header. This
header can be connected to a mechanical switch on the chassis to detect if the chassis
cover is removed.
Table 7 shows the pin assignments for the chassis intrusion header.
Table 7. Chassis Intrusion Header Signal Names
Pin
Description
1
Intruder
2
Ground
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
AUD_GND
6
FP_RETURN_R
8
KEY (no pin)
10
FP_RETURN_L
39
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