>> - what will replace the 16F628?
>
>16F628A
>
>check the migration document. the chance that you will notice the
>transition is very small. (I do have one design that relies on the
>external-resistor oscillator mode, which is not available on the 628A).

There's also a nasty silicon bug in some revisions with writes to Data
EEPROM, which apparently can cause the CPU to go off into lala-land if
you don't take extra precautions.  There is a workaround in the errata
document but it's non-trivial to implement if you were intending to do
anything with the CPU while the write is underway.  Check out:

http://www.microchip.com/download/lit/suppdoc/errata/80151g.pdf

Incidentally, I'd be grateful if someone can explain how to convert the
5-bit revision number from the Device ID word into "A1", "A2", "A3" or
whatever.  I'd imagine that it's a simple mapping, but so far I haven't
seen it described anywhere, and I'd prefer not to guess.  ;-)

All the best.
--
Ian Chapman
Chapmip Technology, UK

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.