I would scope the PIC and external EEPROM Vdd pins and watch what
happens under various durations of power loss.

If the pin and power budget allows, power the external EEPROM from an
I/O pin, to ensure it meets any minimum off time spec.

(in the product that takes most of my time, several devices needed
discharge clamps so that we could meet their power down specs.  just
turning off the bus wasn't enough, we also had to pull it down.)

--=20
James Cameron
http://quozl.linux.org.au/
--=20
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