> > In the datasheet of 18F2455 we have
> > Table 20-3 Baud Rates For Aynchronous Modes (USART module)
> > (I guess other pics would have the same thing as well)
> > The errors seem to range from 0.16% up to -45.75%. Are all these
> > values valid, or should I be aiming at a certain percentage, I am
> > confused?
> 
> Consider anything over about 2.5% bad.

Don't forget to take oscillator accuracy into this; for example, the
onboard osc is usually specced at (IIRC) ~1% (for most PICs),
ceramic resonators are frequently ~.5%, and crystals are ~20ppm.

In the US, Mouser sells in onsie-twosie quantities a ceramic
resonator which gives "good" baud rates, 3.68 MHz.  Unfortunately,
it's surface mount only.

Mike H.

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