Cn2, J1, J10, J13: Serial Ports - Intel MB865 User Manual

CN2, J1, J10, J13: Serial Ports

CN2 (COM1) is a DB-9 connector, while J1 (COM2), J10 (COM3) and
J13 (COM4) are pin headers.
Signal Name
DCD, Data carrier detect
RXD, Receive data
TXD, Transmit data
DTR, Data terminal ready
GND, ground
J1 (COM2) is jumper selectable for RS-232, RS-422 and RS-485.
Pin #
1
2
3
4
5
6
7
8
9
10
COM1 COM2/COM3/COM4
Pin #
1
2
3
4
5
Signal Name
RS-232 R2-422
DCD
RX
TX
DTR
Ground
DSR
RTS
CTS
RI
NC
MB865 User's Manual
INSTALLATIONS
Pin # Signal Name
6 DSR, Data set ready
7 RTS, Request to send
8 CTS, Clear to send
9 RI, Ring indicator
10
RS-485
TX- DATA-
TX+ DATA+
RX+ NC
RX- NC
Ground Ground
RTS- NC
RTS+ NC
CTS+ NC
CTS- NC
NC NC
Not Used
17