21
Connector
JCOM1_2, 3_4: COM Port Box Header(RS232/ 422/ 485)
This connector is a 16550A high speed communications port that sends/receives
16
bytes FIFOs. You can attach a serial device to it.
RS232
RS422
RS485
1
2
DCD
1
2
TXD-
1
2
D-
3
4
RXD
3
4
TXD+
3
4
D+
5
6
TXD
5
6
RXD+
5
6
NC
7
8
DTR
7
8
RXD-
7
8
NC
9
10
GND
9
10
GND
9
10
GND
11
12
DSR
11
12
NC
11
12
NC
13
14
RTS
13
14
NC
13
14
NC
15
16
CTS
15
16
NC
15
16
NC
17
18
POWER
17
18
NC
17
18
NC
19
20
NC
19
20
NC
19
20
NC
JCOM1_2 / JCOM3_4
2
20
1
19