Richard,
        I once read on the list that the internal osc won't vary more
then 3%.  I've communicated with modems using the intrc and never seen a
problem.  However I use my own code and not the usart.

It would depend on what you are trying to communicate with and how picky
it was. i.e. a 57.6K modem would most likely have problems but a 2400
would work with no problems.

What are you communicating with and at what rate?

Aaron

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