>
> I'd consider this (just) acceptable in cases where the other side is
> guaranteed to have a crystal, for example where the PIC will be
> communicating with a PC for uploading data or as a calibration/setup
> port.
> For communication between two PICs, it is a little too sloppy (and may
> always be, getting better than 2% accuracy with an analog RC oscillator
> over all parameters isn't easy)

Beware that even with a Xtal,  frequencies are not exact,
i.e. hardware usart @ 20Mhz PIC:
38.4, 57.6, 115.2 kBaud  all have   -1.36% error
Stef Mientki

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