Static Timing analysis

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SANJAY_R_M

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whether .lef is compulsary in sta flow or not ?
 

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This is the third time this week someone asks about STA flow. I have never seen anyone call anything STA flow in the past decade. I assume you mean logic synthesis... if so, yes, you can do it without lef. there is no good reason for it though. if you have the LEF files, just use them.
 

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STA is one of the feedbacks for synthesis.

The design flow should be telling you what you need and
what you need to do, not us. We don't know your tools
(lef and def pertain, I believe, to Synopsys compiler?).


Are we just a substitute for reading documents that you
were supposed to, but are too lazy? Should we maybe

Here, Let Me Google That For You

Passive-aggressively teach your friends how to Google. For all those people who find it more convenient to ask you rather than search it themselves. Not associated with Google.
googlethatforyou.com

to make your life easier?
 

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okay thank you for your response

but my confusion is whether LEF file is compulsory for STA Analysis after PostRoute Stage or not?
 

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ok, that is a very different question.

you can't reach post route stage without LEF. LEF determines pin locations of the cells. without LEF, there is no routing.

but I stand by my previous comment. if you have LEF files, just use them. this is the industry flow for as long as I can remember. what is the motivation for not using it? I don't get it.
 

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