> So, question is...anyone else all of a sudden found a
> register that decided to fail?

I've had a couple of 16F628's display that fault, straight out of the tube.
Two locations in RAM were 'stuck' at 0xFF.  It was literally only one or
two devices.

I asked here at the time (a few months ago) and no-one else had had the
same experience.  I wrote some code to test for it (write 0xAA to each
location, check it, write 0x55, check it, repeat for all RAM), but it
seemed to be an rare fault.

Incidentally, all devices were handled with normal static precautions, and
the target board has been in manufacture for several years (a few thousand
per year) without problems.

Nigel

--
Nigel Orr, Design Engineer                     nigel@axoninstruments.co.uk
Axon Instruments Ltd., Wardes Road, Inverurie, Aberdeenshire, UK, AB51 3TT
              Phone: +44 1467 622 332   Fax: +44 1467 625 235
                      http://www.axoninstruments.co.uk

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