We're experiencing symptoms where 18F4680's with batch code "0850PA6"=20
are sometimes failing to boot, then preventing us from re-programming them.

The effect has been noticed when an instrument using this device comes=20
in for service. It boots and performs correctly initially, then fails to=20
boot after the first power off-on cycle (typically, 'off' is for some=20
minutes).

Reprogramming the device (using Softlog's "ICP2-Portable" production=20
i.c.p.) does not cure the effect.

Could it be possible that:
a) these PICs were unwittingly programmed with too low a programming=20
voltage by our ICD2's?
b) the ICP2-Portable's programming voltage could do with being set a bit=20
higher?

Note: this effect only seems to affect the above batch code. Changing=20
the PIC for a different code makes it all go away.

Reflections welcome.

Matt
--=20
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