> Has anyone ever tried RS232/485 comms using software and the internal RC
> occillator on this chip...if so what speeds did you achieve before accuracy
> becomes a problem...if it works at all...

We do this on production basis using 9600bps.  BUT we are only sending
two bytes at a time.   The receiving end is a 'real' UART that syncs up on
each start bit.

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