> >The easiest way is to read the revision number directly from the chip.
>
> How?
>
> For example (grabbing one close at hand), PIC18F452-I/P 0207GSP
>
> Is that a B3 or a B5?

You read it electronically.  The revision is the low 5 bits of the device
ID, which on these parts is located at 3FFFFEh - 3FFFFFFh.  I can plug a
chip into my programmer and it determines what it is, then reports the
model and revision.  I assume other programmers can do the same thing.


*****************************************************************
Embed Inc, embedded system specialists in Littleton Massachusetts
(978) 742-9014, http://www.embedinc.com

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics