22
MI988
User’s Manual
2.5.3
COM1 & COM2 RS-232/422/485 Ports (CN7)
COM1:
COM2:
COM1
and
COM2
RS-232/422/485 ports are jumper-less and configurable
in BIOS.
Pin
Signal Name
Pin
Signal Name
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
Signal Name
RS-232
RS-422
RS-485
1
DCD
TX-
Data-
2
RXD
TX+
Data+
3
TXD
RX+
NC
4
DTR
RX-
NC
5
Ground
Ground
Ground
6
DSR
NC
NC
7
RTS
NC
NC
8
CTS
NC
NC
9
RI
NC
NC
1
6
5
9
1
6
5
9
Summary of Contents for MI988
Page 1: ...MI988 AMD Ryzen Embedded V1000 Mini ITX Motherboard User s Manual Version 1 0 July 2018...
Page 14: ...6 MI988 User s Manual 1 6 Block Diagram...
Page 17: ...General Information MI988 User s Manual 9 1 1 8 Dimensions...
Page 18: ...10 MI988 User s Manual This page is intentionally left blank...
Page 22: ...14 MI988 User s Manual 2 3 Jumper Connector Locations on MI988...
Page 38: ...30 MI988 User s Manual This page is intentionally left blank...