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18
MI989
User’s Manual
2.5.1
COM1 & COM2 RS-232/422/485 Ports (CN8)
COM1:
COM2:
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
RX
TX+
DATA+
3
TX
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
Summary of Contents for MI989 Series
Page 1: ...MI989 Series AMD V2000 Mini ITX Motherboard User s Manual Version 1 0 June 2021...
Page 12: ...6 MI989 User s Manual 1 6 Block Diagram...
Page 15: ...General Information MI989 User s Manual 9 1 1 8 Dimensions...
Page 16: ...10 MI989 User s Manual This page is intentionally left blank...
Page 20: ...14 MI989 User s Manual 2 3 Jumper Connector Locations on MI989...
Page 34: ...28 MI989 User s Manual This page is intentionally left blank...
Page 49: ...BIOS Setup MI989 User s Manual 43 4 Serial Port 1 Configuration Serial Port 2 Configuration...
Page 52: ...46 MI989 User s Manual 4 4 6 CPU Configuration...
Page 53: ...BIOS Setup MI989 User s Manual 47 4 4 4 7 IDE Configuration...
Page 57: ...BIOS Setup MI989 User s Manual 51 4 4 4 12 NVMe Configuration...
Page 58: ...52 MI989 User s Manual 4 4 13 AMD CBS...
Page 60: ...54 MI989 User s Manual 4 5 2 North Bridge Configuration...
Page 64: ...58 MI989 User s Manual This page is intentionally left blank...