i have some question about rs232

a · Guest

Can i use rs232 both rx and tx at the same pin like Pin b7.
because of smartcard (silver card pic16f877+24lc64) have 1 pin in rb7 for i/o and i will connect it with pic16f877 and communicate between them by rs232.
Can i use it and pic 16f877 will have 2 rs232 in the same MCU.
Plese let me know example.

carlosma · Joined: 24 Mar 2004 Posts: 53 Location: Portugal

There are two example programs (EX_PBUSM.C and EX_PBUSR.C).
Use RB0 to interface.
Search by "one-wire" on help CCS C Compiler

Carlos

SherpaDoug · Joined: 07 Sep 2003 Posts: 1640 Location: Cape Cod Mass USA

Yes you can use the same pin for RX and TX of a software UART. How you convert the serial to RS232 is another problem. This has little to do with "one-wire" comms.
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