Intel DH77EB - Chassis Intrusion Header; Processor, Front, and Rear Chassis (4-Pin) Fan Headers; Back Panel CIR Emitter (Output) Header; Front Panel CIR Receiver (Input) Header

Technical Reference
49
Table 21. Chassis Intrusion Header
Pin Signal Name
1 Intruder#
2 Ground
Table 22. Processor, Front, and Rear Chassis
(4-Pin) Fan Headers
Pin Signal Name
1 Ground
(Note)
2 +12 V
3 FAN_TACH
4 FAN_CONTROL
Note: These fan headers use Pulse Width Modulation control for fan speed.
Table 23. Back Panel CIR Emitter (Output) Header
Pin Signal Name
1 Emitter out 1
2 Emitter out 2
3 Ground
4 Key (no pin)
5 Jack detect 1
6 Jack detect 2
Table 24. Front Panel CIR Receiver (Input) Header
Pin Signal Name
1 Ground
2 LED
3 NC
4 Learn-in
5 5 V standby
6 VCC
7 Key (no pin)
8 CIR Input