I believe the 17 series are the only ones that can run with external
program memory. Another way to do it would be to have a boot loader that
runs on a flash PIC, reads a program off an external chip, and programs
itself. I think this might have been mentioned on the list before. Of
course, unless you need very specific hardware peripherals (such as an
LCD driver), why not just go to a flash based PIC and ICSP or ICD?

Josh
--
A common mistake that people make when trying to design something
completely foolproof is to underestimate the ingenuity of complete
fools.
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Tan Chun Chiek wrote:
>
> Hi,
>     Is it possible to run a PIC from the program in an external flash? I'm
> thinking of the possibility of a firmware sitting in the PIC that grabs the
> program from a flash chip. It would be especially useful for developing
> programs for OTP PICs minus the cost of a JW part and eprom eraser.

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