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©Vecow EMBC-5000 User Manual
GETTING TO KNOW YOUR EMBC-5000
2.2.9 JCOM1, JCOM2, JCOM3, JCOM4 : Serial Port
Serial port 1 to 4 (JCOM 1 to 4) can be configured for RS-232, RS-422, or RS-485
with auto flow control communication. The default definition of COM 1 to 4 is
RS-232, if you want to change to RS-422 or RS-485, you can find the setting in
BIOS.
BIOS Setting
Function
COM 1 (JCOM1)
COM 2 (JCOM2)
COM 3 (JCOM3)
COM 4 (JCOM4)
RS-232
RS-422 (5-wire)
RS-422 (9-wire)
RS-485
RS-485 w/z auto-flow control
1
10
The pin assignments are listed in the following table :
Serial
Port
Pin No.
RS-232
RS-422
(5-wire)
RS-422
(9-wire)
RS-485
(3-wire)
1, 2
3, 4
1
GND_EARTH GND_EARTH GND_EARTH GND_EARTH
2
GND
GND
GND
GND
3
RI
-----------
CTS-
RI
4
DTR
RXD-
RXD-
-----------
5
CTS
-----------
CTS+
-----------
6
TXD
RXD+
RXD+
-----------
7
RTS
-----------
RTS+
-----------
8
RXD
TXD+
TXD+
DATA+
9
DSR
-----------
RTS-
-----------
10
DCD
TXD-
TXD-
DATA-
Y
L1
1
R10
R9
7
1
7
1
6
A2
A52
B2
B52
10
10
10
10
A1
A51
10
B1
B51
3
1
10
1
10
1
1
4
2
10
1
L2
1
1
1
1
7
3
1
Y
L1
R10
R9
10
1
1
L4
G
O
L3
R1
R2
2
1
1
8
4
5
3
1
39
40
10
9
1
18
4
13
5
14
L4
G
R1
R2
O
L3
1
2
L2
2
10
20
19
1
9
1
4
1 3
259
145
143
1
2
1
146
144
260
2
20
19
JCOM1
JCOM2
JCOM3
JCOM4
