Gigabyte MVBAYAI Manual - Page 20
COM3/COM4 Serial Port 3/4 Cable Connectors, JCOM3 5V/12V/RI Signal Select Header for Serial Port 3
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11/12) COM3/COM4 (Serial Port 3/4 Cable Connectors) COM4 COM3 COM3/COM4 COM3 Pin No. 1 2 3 4 5 6 7 8 9 10 1 2 Definition NRXD3NDCD3NDTR3NTXD3NDSR3GND NCTS3NRTS3NC RI3-/1.5V/12V 9 10 COM4 Pin No. 1 2 3 4 5 6 7 8 9 10 Definition NRXD4NDCD4NDTR4NTXD4NDSR4GND NCTS4NRTS4NC NRI4- 13) JCOM3 (5V/12V/RI Signal Select Header for Serial Port 3) JCOM3 Pin No. 1 2 3 4 5 6 Definition +5V GND NRI3-(RI#) GND +12V GND 2 6 1-2 Close: 5V (Power COM) 1 5 2 6 3-4 Close: RI (STAND COM) 1 5 2 6 5-6 Close: 12V (Power COM) 1 5 Hardware Installation - 20 -
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Hardware Installation
- 20 -
11/12)
COM3/COM4 (Serial Port 3/4 Cable Connectors)
JCOM3
COM3
COM4
1
9
2
10
Pin No.
Definition
1
NRXD3-
2
NDCD3-
3
NDTR3-
4
NTXD3-
5
NDSR3-
6
GND
7
NCTS3-
8
NRTS3-
9
NC
10
RI3-/1.5V/12V
Pin No.
Definition
1
NRXD4-
2
NDCD4-
3
NDTR4-
4
NTXD4-
5
NDSR4-
6
GND
7
NCTS4-
8
NRTS4-
9
NC
10
NRI4-
COM3/COM4
COM3
COM4
2
6
1
5
2
6
1
5
2
6
1
5
1-2 Close: 5V (Power COM)
3-4 Close: RI (STAND COM)
5-6 Close: 12V (Power COM)
Pin No.
Definition
1
+5V
2
GND
3
NRI3-(RI#)
4
GND
5
+12V
6
GND
13) JCOM3 (5V/12V/RI Signal Select Header for Serial Port 3)