Intel Desktop Board DH55HC Technical Product Specification
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Table 12. S/PDIF Header
Pin Signal Name
1 Ground
2 S/PDIF out
3 Key (no pin)
3 +5V_DC
Table 13. Internal Mono Speaker Header
Pin Signal Name
1 −
2 +
Table 14. Front Panel Audio Header for Intel HD Audio
Pin Signal Name Pin Signal Name
1 [Port 1] Left channel 2 Ground
3 [Port 1] Right channel 4 PRESENCE# (HD Audio/AC ’97 detect)
5 [Port 2] Right channel 6 [Port 1] SENSE_RETURN
7 SENSE_SEND (Jack detection) 8 Key (no pin)
9 [Port 2] Left channel 10 [Port 2] SENSE_RETURN
Table 15. Front Panel Audio Header for Passive AC ’97 Audio
Pin Signal Name Pin Signal Name
1 MIC 2 AUD_GND
3 MIC_BIAS 4 PRESENCE# (HD Audio/AC ’97 detect)
5 FP_OUT_R 6 AUD_GND
7 NC (no connect) 8 KEY (no pin)
9 FP_OUT_L 10 AUD_GND
Table 16. Front Panel USB Header
Pin Signal Name Pin Signal Name
1 +5 VDC 2 +5 VDC
3 D- 4 D-
5 D+ 6 D+
7 Ground 8 Ground
9 KEY (no pin) 10 No Connect
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