Installing and Replacing Desktop Board Components
39
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 6 shows the pin assignments and signal names for Intel
HD Audio and Table 7 shows the pin assignments and signal names for AC’97 Audio.
Table 6. Front Panel Audio Signal Names for Intel HD Audio
Pin Signal
Name
Pin Signal
Name
1
PORT 1L (Microphone)
2
GND
3
PORT 1R (Microphone)
4
PRESENCE#
5
PORT 2R (Headphone)
6
SENSE1_RETURN
7 SENSE_SEND
8 KEY
(no
pin)
9
PORT 2L (Headphone)
10
SENSE2_RETURN
Table 7. Front Panel Audio Header Signal Names for AC’97 Audio
Pin Signal
Name
Pin Signal
Name
1
MIC
2
AUD_GND
3 MIC_BIAS
4 AUD_GND
5 FP_OUT_R
6 FP_RETURN_R
7 AUD_5V
8 KEY
(no
pin)
9 FP_OUT_L
10
FP_RETURN_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 8 shows the pin assignments for the chassis intrusion header.
Table 8. Chassis Intrusion Header Signal Names
Pin Description
1
Intruder
2 Ground