14
3.11 Serial Port Connectors
The HS-4703 offers two NS16C550 compatible UARTs with
Read/Receive 16-byte FIFO serial ports and four internal 10-pin
headers.
CN2(1-9): COM1 Connector (DB9)
PIN
Description
PIN
Description
1
DCD1
6
DSR1
2
RXD1
7
RTS1
3
TXD1
8
CTS1
4
DTR1
9
RI1
5
GND
1
6
5
9
CN2(10-18): COM1 Connector (DB9)
PIN
Description
PIN
Description
10
DCD2
15
DSR2
11
RXD2
16
RTS2
12
TXD2
17
CTS2
13
DTR2
18
RI2
14
GND
1
6
5
9
CN11/CN10: COM3/COM4 Connector (5x2 header)
PIN
Description
PIN
Description
1
DCD
2
DSR
3
RXD
4
RTS
5
TXD
6
CTS
7
DTR
8
RI
9
GND
10
N/C
2
4
6
8
10
1
3
5
7
9
DSR
RTS
CTS
N/C
RI
DCD
RXD
TXD
GND
DTR
CN6: RS-422/485 Connector (5x2 header)
PIN Description PIN Description
1
TX-
2
TX+
3
RX+
4
RX-
5
GND
6
RTS-
7
RTS+
8
CTS+
9
CTS-
10
N/C
2
4
6
8
10
1
3
5
7
9
TX+
RX-
RTS-
N/C
CTS+
TX-
RX+
GND
CTS-
RTS+