Intel DX79TO - IEEE 1394 A Header; SATA Connectors; USB 2.0 Headers; Chassis Intrusion Header

Technical Reference
49
Table 15. IEEE 1394a Header
Pin Signal Name Pin Signal Name
1 Data A (positive) 2 Data A (negative)
3 Ground 4 Ground
5 Data B (positive) 6 Data B (negative)
7 +12 V DC 8 +12 V DC
9 Key (no pin) 10 Ground
Table 16. SATA Connectors
Pin Signal Name
1 Ground
2 TXP
3 TXN
4 Ground
5 RXN
6 RXP
7 Ground
Table 17. USB 2.0 Headers
Pin Signal Name
1 +5 V DC
2 D−
3 D+
4 Ground
5 Key (no pin)
Table 18. Chassis Intrusion Header
Pin Signal Name
1 Intruder#
2 Ground
Table 19. Processor, Front and Rear Chassis, and Auxiliary
(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.