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Installing and Replacing Desktop Board Components
47
Front Panel Audio Header
The front panel audio header shown in Figure 23, A supports both Intel High Definition
(HD) Audio and AC ’97 Audio.
Table 4 shows the pin assignments and signal names for
HD Audio and Table 5 shows
the pin assignments and signal names for AC ’97 Audio.
Table 4. 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 5. 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
Internal Mono Speaker Header
The internal mono speaker header is shown in Figure 23, B. Table 6 shows the pin
assignments and signal names for the internal mono speaker header.
Table 6. Internal Mono Speaker Header
Pin Signal Name
1 −
2 +