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Lpc2000

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Re: [lpc2000] Power Supply Sequencing - Latchup

2004-07-12 by Robert Adsett

There is an opportunity here for Philips to step in if they have found out 
anything about this.

At 01:12 AM 7/12/04 +0000, you wrote:
<snip>
>3) Robert (messages 1256, 1281, & 2536) and Bob (message 2533) say
>they have made tests which were not able to reproduce a supply
>sequencing problem.
>
>Do you feel that you have also ruled out supply rise time as the
>problem?

Not absolutely, but likely.  If the problem is the power supply rising too 
fast than simply switching it on to the micro after it has stabilized 
(essentially what I did) will give a fast and rather dirty edge.  If it's 
too slow than adding extra capacitance (what Tsvetan did) will slow it down 
and presumably make the problem worse.  Mine was a quick and dirty test but 
it ruled out a simple sequencing explanation.


Robert

" 'Freedom' has no meaning of itself.  There are always restrictions,
be they legal, genetic, or physical.  If you don't believe me, try to
chew a radio signal. "

                         Kelvin Throop, III

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