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Lpc2000

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Message

Re: Power Supply Sequencing - Latchup - FOLLOWUP

2004-09-10 by Richard

These were very early devices, only the 210x family was affected.  
Very few were released, most as samples.



--- In lpc2000@yahoogroups.com, "jamesradix1969" 
<jamesradix1969@y...> wrote:
> --- In lpc2000@yahoogroups.com, "tsvetanusunov" <tusunov@m...> 
wrote:
> > --- In lpc2000@yahoogroups.com, "g2100g" <g2100g@e...> wrote:
> > > 1) Other than the report from Tsvetan (messages 
1236/1249/1257), 
> is 
> > > anyone aware of problems related to Power Supply sequencing or 
> rise 
> > > times?
> > > 
> > > 2) Is anyone aware of any other problems of the processor going 
> > into 
> > > a latchup state?
> > 
> > This may be interesting to group members who have early revisions 
> of 
> > LPC2106 still unused or in devices working in the field.
> > Philips have receive two sample boards which had the latchup 
> problem 
> > described by me. This is the reply I received yesterday:
> > 
> > "The boards were experiencing a flash latchup problem associated 
> with 
> > very early versions/samples of those parts (Rev. B).  The current 
> > revision (C) does not have this problem.  Make sure that the 
reset 
> > circuit provides at least a reset duration of a least 10ms at 
> power 
> > up and 300ns thereafter. 
> > 
> > Richard"
> > 
> > 
> > Best regards
> > Tsvetan
> 
> How can you tell which version of the chip you have?  Is it part of 
> the printed markings on the chip?  Do other family members (2129) 
> have this problem too?
> Thanks,
> James

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