>As long as I ignore the pins which won't be on my target
>'proc,. I can then use either the 28 pin devices as a
>stand-in for any of the low-pin count devices (while not
>eating the width which is a point well taken), and then
>the 40 pin devices when I think that the pin count might
>get close to the 28 pin devices.
>
>The other thing I thought hard about is the whole 16F vs
>18F vs 30F thing (and should I just standardize on say the
>18F or 30F line and forget the lower end products).

One thing to watch out for is some of the larger chips have a facility where 
you can make the chip look like it is the smaller package chip for debugging 
purposes, so some of the I/O ports get turned off.

Cannot remember which chips I was looking at that had this facility, but 
IIRC they were 18F series. 

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