Bob Lunn
08/11/97 06:53 PM


>>> What I'd *really* like to see is a list where they
>>> state which PIC the 'future' chip will be based on.
>>> It took me ages to discover that the 16C77 will be
>>> available in a 'flash' version (16C877).
>>
>>     In those cases where the data sheet includes
>>     a 'package options' section you'll find a note
>>     like "footprint compatible with...".
>>
>>     In those cases where the data sheet includes
>>     a 'pin diagram' section they seem to assume
>>     that you'll compare pinouts and "reverse
>>     engineer"!
>
> That's what I thought. Problem is, all the PIC with the
> same number of IO pins also share the same footprint...

     Umm, no...  By 'footprint compatible' they mean
     something more than "your circuit wont blow up"!

     They mean that a comparator input is still a
     comparator input, and T0CLKIN is just that.

     Thus, the 16C772 is 'footprint compatible with
     popular PIC16C72'.  I take this to mean that the
     16C772 is a pin-for-pin plug-in replacement for
     the 'C72 (though the s/w may need to be changed).

___Bob