> I should add that I am beginning with the 18F452 chip and have no
> experience with any of the earlier ones.

Yup, that's the right thing to do.  Unless you are designing high volume
products, just stick with the 18F series and don't look back.  If this is
for hobby use or prototyping, just get a few 18F452 (40 pins), 18F252 (28
pins), and 18F1320 (18 pins).  Except for some point features (like CAN,
motor control kernel, external program memory), the other 18Fs are just
cost optimized versions of these with various amounts of memory removed.


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