At 8:38 AM 5/25/96, Craig E. Gooder wrote:
>I WANT TO DO RS232 FROM MY COMPUTER TO A PIC16C65 OR 74.  LOOKING AT THE
>MICROCHIP 94/95 CONTROL BOOK SECTION AN547 I WAS CONFUSED.  I WANT TO BE
>ABLE TO SEND/RECIEVE DATA AT MY COMPUTER.  I WAS PLANNING ON DOING
>ASYNCHRONOUS & USING A PARITY BIT.  I WANT TO USE THE MAX-232 CHIP WHICH
>APPEARS TO ONLY HAVE TX & RX.  SEEING THIS I ASSUME THAT I MUST USE THE
>SOFTWARE TX & RX POLLING EXAMPLES SHOWN IN THE BOOK.  IN ORDER TO MAKE SURE
>THAT THE DATA IS GETTING RECIEVED AND TRANSMITTED CORRECTLY I ASSUME THAT I
>MUST DEVELOP SOME SORT OF HANDSHAKING LOGIC BETWEEN THE TWO.  IF SOMEONE
>COULD CONFIRM MY ASSUMPTIONS PLEASE DO SO.  I WAS THINKING ABOUT DOING CTS
>& RTS HANDSHAKING BUT WAS THINKING THIS WOULD MAKE MY LIFE MORE DIFFICULT.
> NOTE THAT SPEED IS NOT AN ISSUE.  PLEASE COMMENT THANK YOU.


Maxim and other manufactures make 232 interface chips with more 232 lines.
I'm using the 238 which has 4 in and 4 out.