Hi all,

Getting back into PIC dev recently, and I've run into a=20
somewhat-familiar EEPROM issue.  I'm preloading a PIC18F46K22 with 400+=20
bytes of data and it works fine initially, but after some time (with no=20
EEPROM writes from the code) the data is getting corrupted.  Swapped the=20
chip and same issue.  Without any writes, it seems it's not the old=20
wear-leveling issue with writing to some cells possibly degrading or=20
corrupting other cells.  The only thing that happened from working to=20
non-working is that power was cycled several times.

I do have brown-out reset enabled (at 2.85V), so I don't think it's that.

I know there are some concerns about data EEPROM in these devices, so=20
the bottom-line question is if this could be made to run reliably=20
nowadays, or should I be seeking alternate options?  In the past I've=20
moved the data to an external serial-EE, but in the essence of time=20
here, I'd like to find a solution with the existing hardware. Is writing=20
to flash program memory more reliable?  I could also run a sort of=20
RAID-type duplicated-table system, but that still does not make me=20
comfortable that all is hunky-dory.

What else could I be missing here?

Cheers,
-Neil.

--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.