kenasw@btinternet.com wrote :

> 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?

Note that the table are just examples. A lot of them will
*never* work. Try to stay (in *your* application) within
"a few" % from the nominal speed.

Exactly how many "a few" is varies a little depending on
who you ask, but 1-2 % would probably be "safe"...

Note that there are "special" crystals with "funny" (odd)
speeds that makes it easier to be on the spot.

Jan-Erik.



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