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RE: [lpc2000] re: LPC Internals Question

2006-02-02 by Paul Curtis

Hi, 

> Consider the following purely hypothetical scenario: a) LPC variants
> have identical architecture on silicon; b) anyone can upgrade or
> downgrade the parts in their possession between these variants; and c)
> quite by accident you discover how to do this in the course 
> of your work.
> 
> I like the opinion from the vocals here as to what you would/should do
> in with your discovery.

Hypothetically, one assumes that all chips are graded and those that do
not make the grade (i.e. have certain defects) will have those defective
blocks disabled before being packaged as some other chip.  One assumes
that if the process is in some way reversible, it's an interesting
academic exercise but if you turn on and make use of the defective
blocks then you're asking for a certain amount of trouble from customers
and, perhaps, Philips.

Isn't it common to grade CPUs this way?  It's just what I've read in the
many books I have, I have no direct experience with semi foundries.

Just my opinion.

--
Paul Curtis, Rowley Associates Ltd  http://www.rowley.co.uk
CrossWorks for MSP430, ARM, AVR and now MAXQ processors

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