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17. COM1
1
1
Pin
RS232
1
DCD-
2
RD
3
TD
4
DTR-
5
GND
6
DSR-
7
RTS-
8
CTS-
9
RI-
3. Speaker
Pin
Assignment
1
SPK_Out_L+
2
SPK_Out_L-
3
SPK_Out_R-
4
SPK_Out_R+
20. CPU Fan
9
Pin
Assignment
1
10
1
Ground
2
Power
3
Sense
31. Heater
9
1
Pin
Assignment
10
2
1
12V
9
1
2
12VSB_PG_SW
10
2
Quick Reference | GH551
9
1
2
RS422
RS485
TXD-
Data-
TXD+
Data+
RXD+
N.C.
RXD-
N.C.
GND
GND
N.C.
N.C.
N.C.
N.C.
10
9
N.C.
N.C.
N.C.
N.C.
2
1
1
1
1
1
1
2
6
1
1
5
2
6
1
2
1
5
1
1
1
1
39
40
1
1
2
1
5
2
1
2. Front Audio
Pin
Assignment
1
Mic-L
3
Mic-R
5
Line-Out-R
7
GND
9
Line-Out-L
18. SATA
7
GND
RX+
RX-
GND
TX-
TX+
GND
1
21. DIO
Pin
Assignment
1
DIO_7
1
3
DIO_3
1
5
DIO_5
7
DIO_1
9
5VSB
14. SMBus
Pin
Assignment
1
1
3V3SB
3
SMBus_Clock
5
SMBus_Alert
1
Pin
Assignment
2
GND
4
N.C.
1
1
6
Mic-JD (sense)
1
8
N.C.
10
Line-JD (sense)
19. SATA Power
39
1
39
Pin
Assignment
2
DIO_6
9
4
DIO_4
6
DIO_2
8
DIO_0
1
10
GND
9
1
Pin
Assignment
2
GND
2
9
1
4
SMBus_DATA
6
---
2
1
10
9
1
1
10
9
2
1
2
6
1
1
5
2
6
2
1
1
1
5
1
1
1
1
1
2
6
1
5
1
2
6
2
6
39
40
1
5
1
5
2
6
+5V
1
1
5
GND
GND
1
N.C.
1
1
2
40
9
1
10
1
10
2
40
2
1
5
2
1
1
1
2
2
10
2
2
1
10
5
2
1
2
1
5
2
1
3