Thanks for the suggestions.

I am observing the errata sheet relative to reading
EEPROM.  The PICs I have are new.  I am seeing the
same thing on some five PIC18F1320s.

I started with a single write as I have done on every
other design using PICs (not the 18F1320).  Then, I
went to a write - read verify and found I had to
increase the number of tries to 500.  Crazy.

The PICs I am using are from May.  I have ordered
more, but this is a slim.

I am using the internal 4.0 MHz clock, which just
might be my problem.

If worse comes to worse I may have to revise the
design to store the data in flash memory.  This is for
an inexpensive LCD Kit where the LCD geometry, cursor
type, tab size and user defined characters are stored
in non-volatile memory, which change infrequently over
the life of the product.

Once again, thanks.

PHA, http://www.phanderson.com




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