The EM500EV-IB0 RS232 interface board implements one RS232 serial port. The port is built around SIPEX SP3243 RS232 transceiver IC. RS232 interface lines are available on a standard DB-9M connector:
Pin # (DB-9M) |
R232 line (DB-9M) |
EM500 control line |
1 |
CD (input) |
GPIO4/P0.4 |
2 |
RX (input) |
RX |
3 |
TX (output) |
TX |
4 |
DTR (output) |
GPIO3/P0.3 |
5 |
SYSTEM GROUND |
|
6 |
DSR (input) |
GPIO1/P0.1/INT1 |
7 |
RTS (output) |
GPIO2/P0.2 |
8 |
CTS (input) |
GPIO0/P0.0/INT0 |
9 |
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