IBASE Technology MI811F-335, User Manual, Page: 33 / 96

Hardware Configuration
MI811F Series
User’s Manual
25
2
2.5.2 COM1 RS-232/422/485 Port & COM2 RS-232 Port
(CN2)
COM1:
COM2:
1
6
5
9
1
6
5
9
COM1 RS-232/422/485 port is jumper-less and configurable in BIOS.
Pin Assignment Pin Assignment
1 DCD, Data carrier detect 6 DSR, Data set ready
2 RXD, Receive data 7 RTS, Request to send
3 TXD, Transmit data 8 CTS, Clear to send
4 DTR, Data terminal ready 9 RI, Ring indicator
5 Ground
Pin
Assignment
RS-232 RS-422 RS-485
1 DCD TX- Data-
2 RXD TX+ Data+
3 TXD RX+ N/A
4 DTR N/A N/A
5 Ground Ground Ground
6 DSR RX- N/A
7 RTS N/A N/A
8 CTS N/A N/A
9 RI N/A N/A