> I'd like to start using the internal data eeprom on the
> F876 in place of the external 24LC01 we've been using.
> However, Microchip's data sheet says the endurance of
> the data eeprom is 100,000 writes, vs. 1,000,000 for
> the 24xxx (I even saw a reference in the archives that
> said endurance of the 24xxx type parts is actually
> 10 million).
> Is Microchip being real conservative here, or is the
> data eeprom on these chips just not as robust?

I'm sure Microchip is conservative when publishing such specs - they have to
be.  After all, this is the number of write cycles ALL the parts are capabable
of.  The average HAS to be higher.  Any one part you pick out of a bin will
probably do a lot better than the spec, but you can't rely on that.  It
could be OK to hope for more write cycles for a one off hobby project, but
you don't want to do that in a serious design.

I doubt Microchip is being more conservative with the 16F876 than with the
24LC01, so I assume the latter really can handle significantly more write
cycles.


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, olin@embedinc.com, http://www.embedinc.com

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