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Lpc2000

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Message

Re: 5V, 3.3V IO problem

2004-12-15 by lp2000c

--- In lpc2000@yahoogroups.com, "jamesasteres" <jamesasteres@y...> 
wrote:
> 
> Is this really true?  At power-up if I apply 5V for microseconds 
(or 
> milliseconds) before 3.3V the "5V tolerant" I/O feature does not 
> work?  What happens, does the part latch-up or do some horrible 
> thing?  How serious is this problem?
> James
> 

Good question.  I am just trying to make no assumptions beyond what 
is actually written in the data sheet.

Another question: How about if there is a resistor in series limiting 
the current?  Would that make it legitimate?

Philips Apps: Can you give us more details on this spec?

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