Datasheet
Table Of Contents
- Intel® Desktop Board D2550DC2 Technical Product Specification
- Revision History
- Preface
- Contents
- 1 Product Description
- 2 Technical Reference
- 3 Overview of BIOS Features
- 4 Board Status and Error Messages
- 5 Regulatory Compliance and Battery Disposal Information

Technical Reference
43
2.2.2.1 Signal Tables for the Connectors and Headers
Table 11. System Fan Header
Pin Signal Name
1 Ground
2 +12 V (PWM controlled pulses)
3 Tach
Table 12. SATA Connectors
Pin Signal Name
1 Ground
2 TXP
3 TXN
4 Ground
5 RXN
6 RXP
7 Ground
Table 13. Front Panel Wireless Activity LED Header
Pin Signal Name
1 Ground
2 MINICARD_WLAN#
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 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