> This was covered in a recent thread.  You DO need to perform a refresh
> of the entire EEPROM if one or more cells are written to more than the
> number specified in the data sheet.

Well, only if there are *other* cell(s) that are *not*
written att all during the same timeframe. You do not have
to refresh cells that doesn't store any real "data" anyway.
The "refresh" could be to just read and re-write a single cell
in the most extreme case. If every *used* cell is re-written
"often" by the application, you don't have to refresh at all, AFAIK.

> I don't know the mechanism behind this, but writing to one
> celll essentialy removes some charge from the
> others so data will be lost unless all cells are refreshed.  This is
> explained in the datasheets.

But the problem is that everyone who starts this thread,
*have* seen that in the data sheet(s), but didn't
understand it. It's not one of the clearest parts
of the data sheet(s), IMHO... :-) :-)

Regards,
Jan-Erik.



_______________________________________________
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist