> Van: John Hansen <hansen@oak.ait.fredonia.edu>
> Aan: PICLIST@MITVMA.MIT.EDU
> Onderwerp: 16F84 EEPROM Write/Erase Cycles
> Datum: dinsdag 10 maart 1998 4:34
>
> Hi:
>
>    I am working on a program that is going to do a lot of writing
> to the EEPROM data memory on a 16F84.  Microchip estimates that
> these chips are good for 1,000,000 write/erase cycles.
[Cut]

MicroChip has a PDF-file (21055B.PDF) containing information about the
matter.
Maybe you can find your answer there.

Bear in mind, a xxx write/erase cycle lifetime is _NOT_ the number of
cycles
before some memory-cell fails, but the number of cycles before the numer of
failing erasures/writings exeeds a certain amount.  This means that you can
have itermitently failing cells, but according to MicroChip's
specifications your
EEPROM is still O.K.

(This allso means that you have to check your write-attempt on the EEPROM
 and try again if it failed.)

> Thanks!
>
> John Hansen

Greetz,
  Rudy Wieser