> 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?

Usually if I am designing something using the usart, I choose a crystal
frequency that divides well. For the 16-series PICs and PC baud rates,
19.6608 MHz is readily available.

For the 18 series with PLL, you will need to choose something 10MHz or less.

Cheers,

Bob


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