2
34
1
33
3.11 Serial Port Connectors
The 3301320 offers two NS16C550 compatible UARTs with
Read/Receive 16byte FIFO serial ports with two internal 5x2
connectors and one DB9.
z
CN11, CN12: COM1/COM2 (5x2 Header)
PIN Description PIN Description
1
DCD
2
DSR
3
RXD
4
RTX
5
TXD
6
CTX
DCD
1
RXD
3
2
DSR
4
RTX
7
DTR
8
RI
9
GND
10
N/C
TXD
5
DTR
7
GND
9
6
CTX
8
RI
10 N/C
z
CN17: COM1 (DB9 only for 3301320P)
PIN Description
1
DCD1
2
RXD1
5
9
3
TXD1
4
DTR1
5
GND
6
DSR1
7
RTX1
8
CTX1
9
RI1
16