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To: wanna_bmw who wrote (163630)4/6/2002 9:08:21 PM
From: combjelly  Read Replies (1) | Respond to of 186894
 
"Scumbria's post had to do with Cell Based designs and getting faster turn-around time with design changes"

Well, consider. a faster turn-around means that errata can be addressed that much quicker, if nothing else.

"you were trying to summarize something you heard second hand, without really understanding it."

What indicated that?

"Scumbria does not say anything about cell based designs resulting in larger die sizes, greater power levels, or lower bug counts."

No he didn't. But consider, unless you have a huge number of cells, you just aren't able to have a cell in a given portion of the design that is very optimal. The fanout is going to be some typical value and not what is need for that portion of the design. So it will tend to burn more power and/or be larger than is strictly necessary. The lower bug count would be a by product of the cell begin tested and validated thoroughly and not being changed until it is moved to a new process. Intel has been doing at least one major mid-cycle makeover to their libraries when they typically shrink the design by 10% or so. Check sandpile.org and see. There is just no was they can do that and not be making major changes. And that means that it is tougher to verify the design, there are just too many places where a mistake can creep in. With process generations being 18 months and getting shorter, this problem is only get more acute.

"Those were your interpretations, and I don't think they are correct."

Ok. What do think is correct?