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Installing and Replacing Desktop Board Components
45
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 5 shows the pin assignments and signal names for
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 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 6. 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 PRESENCE#
5 FP_OUT_R 6 AUD_GND
7 No connect 8 KEY (no pin)
9 FP_OUT_L 10 AUD_GND
IEEE 1394a Header
See Figure 20, B for the location of the IEEE 1394a header. Table 7 shows the pin
assignments for the header.
Table 7. IEEE 1394a Header Signal Names
Pin Signal Name Pin Signal Name
1 TPA1+ 2 TPA1-
3 Ground 4 Ground
5 TPA2+ 6 TPA2-
7 +12 V 8 +12 V
9 Key (no pin) 10 Ground