Hello learned people,

This is a new one on me. PIC 16F877 -
programming from MPLAB version 4.02.

Brand new chip - programmed once, worked
fine. second attempt (to download a revision)
runs to completion, then reports failure,
doesn't blow the fuses.

error log indicates dozens of program memory
locations are bad. 5 unsuccessful passes.
Tried programming in 3FFFs, same result.

If I change the program code, failures occur
at different addresses. If I don't change the
code, failures occur at same addresses.

On a read, configuration bits are showing
correctly - they would have been set during
the initial successful pass. Same with device
ID, which is a custom ID.

Any ideas, or do I have another candidate for
the wall display ?


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Kenneth C. Finney
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Wilkes Associates, Inc.
Software Engineering - Embedded Systems
Design & Development - Project Management
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170 The Donway West Ste. 405, Toronto, Ontario
Office: (416) 445-9224 Mobile: (416) 453-6400
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