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1999\05\10@111331 by John Burkhardt

Has anyone been successful in writing to the on-board EEProm in these
parts? I have been able to simulate the operation with an external
EEProm using Microchip's code fragment. When I burn a part the
internal EEProm does not work.

If anyone has had success with this part I would appreciate hearing
from you.


John Burkhardt

1999\05\12@015856 by Dr. Imre Bartfai

I have had the same problem. I used the said code fragment. After
inserting some NOPs it came out the EEPROM operation fails if the highest
bit of the data to be written is 1, i. e. data GE 80h. Such way, I split
the data in two nibbles and I write the nibbles with high nibble set to
zero. Then it works. However, it is not very storage efficient method
Yesterday I took part on a Microchip seminar. The engineer said the
problem is known and caused by some timing specification issue. They will
post the corrected routine ASAP.
I hope this helps.

On Mon, 10 May 1999, John Burkhardt wrote:

{Quote hidden}

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