Com1 & Com2 Serial Port (J1) - IBASE Technology IB981AF-C226 User Manual

2.5.1 COM1 & COM2 Serial Port (J1)
COM1 (pin1 ~ pin10) supports RS-232/422/485.
COM2 (pin11 ~ pin20) supports RS-232 only.
Pin Assignment
1 DCD1
3 RXD1
5 TXD1
7 DTR1
9 Ground
11 DCD2
13 RXD2
15 TXD2
17 DTR2
19 Ground
Assignment
Pin
RS-232
1 DCD
3 RX
5 TX
7 DTR
9 Ground
2 DSR
4 RTS
6 CTS
8 RI
10 NC
18
Pin
2
4
6
8
10
12
14
16
18
20
RS-422
TX-
TX+
RX+
RX-
Ground
NC
NC
NC
NC
NC
1
2
Assignment
DSR1
RTS1
CTS1
RI1
NC
DSR2
RTS2
CTS2
RI2
NC
RS-485
DATA-
DATA+
NC
NC
Ground
NC
NC
NC
NC
NC
IB981 User's Manual
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