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Thread: Strange behavior 12CE519
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face BY : Dr. Imre Bartfai email (remove spam text)



Hi friends, I have the following problem: I need to store some
configuration data (actually an iButton serial number) in the E2PROM of
the 12CE519. I use the program fragment recommended by Microchip
(fl51x...). I have experienced if the particular byte to be stored is
somewhat higher (I guess if it exceeds 80h), the data I read out latter is
0FFh. I did as workaround that I split every bytes into 2 nibbles -> 2
bytes, higher nibble is zeroed. Then it works, but it is
storage-inefficient method. Any hints/suggestions are welcome.

Regards,
Imre

P.S: I use actually the same routine to handle the E2PROM of 16CE625,
without any problem.

<Pine.LNX.3.96.990503081659.221D-100000@prof.pmmf.hu>

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