> I am working on two PIC16C63 projects. Both involve serial communication
> with other (Dallas) controller. Reception is interrupt driven (just one
> byte to receive). Both interrupt service routines are almost identical
> (interrupt enables, reception enables etc.) Nevertheless, while in one
> project communication is flawless, in other project reception stops at
> certain point and never happens again until program restarts (the rest
> of the program still working just fine).
> Will appreciate any advice.

Is it possible that you are getting receiver overruns ?  I had this
problem on a 16C63 where it would appear to lock up and would not
receive any more characters.

The way I did it was to check RCSTA:FERR.  If an overrun had
ocurred I read RCREG twice to empty the receive shift register, and
then reset the receiver by clearing RCSTA:CREN, and then setting it
again.

Hope this helps.

Cheers, Ian.