Rafael Vidal Aroca wrote:
>     Hi, i'm migrating a 16F628 based system to 18F452

That's quite a jump.  18 pins to 40, 2K to 16K words program memory, 14 to
16 bit core.  That's practially a new design, not a "migration".

>     2. May I use the code I have running in 16F628 in 18F452 with no
> changes,

Of course not.  The two processors have different instruction word sizes for
one thing.  If you wrote the original code with portability in mind, or used
something like my development environment (http://www.embedinc.com/pic) then
the source code only requires minimal changes and a rebuild.  If you didn't,
it's going to be more tedius.


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