( ESNUG 386 Item 8 ) --------------------------------------------- [01/16/02]

From: "Ken Wagner" <ken_wagner@pmc-sierra.com>
Subject: How Useful Are Cell Power Estimation EDA Tools Vs. Actual Silicon?

John,

Thanks for ESNUG.  Most helpful is the opinionated user commentary.

I have been reviewing reader comments on your http://DeepChip.com looking
for information on the correlation between calculations of total power by
cell level power analysis tools and actual silicon.  Not a word to be
found...  hmmm...  So then how good are these 4 significant digit power
model library characterizations that many are using?  Are they useful only
for relative power comparison or can they be used more reliably?

Even the marketing folks are not reporting much -- other than correlating
to transistor level tools.

    - Ken Wagner
      PMC-Sierra, Inc.


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