At 08:36 PM 3/11/99 -0700, you wrote:
>>Hi,
>>
>>I have a PIC16LC715 with industrial temp range running off a 32768Hz
>watchcrystal in LP mode @ 3V.  I was playing around with it today -
>spraying(the uP only) witha freezing spray and I got some interesting
>behavior at low temperatures.
>
><big snip>
>
>I've encountered something similar which I tracked down to leakage caused by
>moisture condensing on the package and pins.  Try spraying conformal coat
>onto the suspect areas first to see if that affects operation.
>
>dwayne

Hmm I suspected this too as the problem seems to occur just after the time
moisture
forms - but by inspection there dosent seem to be any contacts being made
also I've tried
conformal coatings - both a resin and a simpler laquer - they both do it.
The pins next to CLKIN are at Vcc and so is CLKOUT so I would have expected
CLKIN to go too high
rather then too low.


Nic