Lpc2000

At 08:53 AM 3/23/06 +0000, Thiadmer Riemersma (ITB CompuPhase) wrote:
>A floating pin (whether "by design" or by a bad soldering) was our
>first thought too. Note that so far we have tested more than 30 boards
>and so far only 2 cause these spurious interrupts.

Something to consider is cracked capacitors.  Stress on the board (perhaps 
from bad panel separation procedures) can crack ceramic surface mount 
devices particularly if they are close to the stress origin.  I ran into a 
bunch of these once and the key to finding them initially was to breathe on 
them.  The extra humidity was all the was needed to trigger the observed 
behaviour on most.  The cracks tended not to be visible to the naked eye 
but when the different layers of the caps shorted bad things 
happened.  That's a subtle enough effect to be overlooked unless you 
specifically hunt for it.

Robert

" 'Freedom' has no meaning of itself.  There are always restrictions,   be 
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radio signal. "  -- Kelvin Throop, III
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