Intel DB75EN Technical Product Specification - Page 47
Signal Tables for the Connectors and Headers
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Technical Reference 2.2.2.1 Signal Tables for the Connectors and Headers Table 13. Serial Port Header Pin Signal Name 1 DCD (Data Carrier Detect) 3 TXD# (Transmit Data) 5 Ground 7 RTS (Request To Send) 9 RI (Ring Indicator) Pin Signal Name 2 RXD# (Receive Data) 4 DTR (Data Terminal Ready) 6 DSR (Data Set Ready) 8 CTS (Clear To Send) 10 Key (no pin) 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# (Dongle present) 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 AC '97 Audio Pin Signal Name Pin Signal Name 1 MIC 3 MIC_BIAS 5 FP_OUT_R 2 AUD_GND 4 AUD_GND 6 FP_RETURN_R 7 AUD_5V 9 FP_OUT_L 8 KEY (no pin) 10 FP_RETURN_L Table 16. Front Panel USB 2.0 Headers Pin Signal Name Pin 1 +5 V DC 2 3 D- 4 5 D+ 6 7 Ground 8 9 KEY (no pin) 10 Signal Name +5 V DC DD+ Ground No Connect 47