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rakko
Joined: 01 Jun 2001 Posts: 244 Helped: 2 Location: mozambic
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02 Aug 2003 17:37 TSMC .13u Library |
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Can anyone tell me the difference between avant! slow.db and fast.db. More specifically, which one to use for synthesis and which for layout? I can't find good reference to this in tsmc documents! Does tsmc have a document to explain this?
Thanks for any help.
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patrickli
Joined: 04 Mar 2002 Posts: 36
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03 Aug 2003 3:32 |
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slow.db is for checking setup time. fast.db is for checking hold time.
when you synthesize , you shouls choose slow.db. after synthesize, you fix hold time using fast.db.
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philewar
Joined: 17 Mar 2002 Posts: 114 Location: Shanghai
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03 Aug 2003 4:46 |
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| rakko wrote: |
Can anyone tell me the difference between avant! slow.db and fast.db. More specifically, which one to use for synthesis and which for layout? I can't find good reference to this in tsmc documents! Does tsmc have a document to explain this?
Thanks for any help.
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Hello,
slow.db means your design is runing at a worst case environment, i.e. high temperature, low voltage while fast.db means a best case where low temperature and high voltage. Process issues also play a part.
Generally speaking, circuits with fast run faster than those with slow.
What Patrick Li tells is right, too.
Best,
philewar
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nanako
Joined: 20 Jul 2001 Posts: 119
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03 Aug 2003 8:26 |
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| apart from slow and fast they have typical lib. also. to be safe, you can synthesis and run simulation with all the 3 lib. to ensure that timing is met.
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ala
Joined: 30 Jun 2003 Posts: 44 Helped: 4
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03 Aug 2003 8:56 Re: TSMC .13u Library |
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| rakko wrote: |
Can anyone tell me the difference between avant! slow.db and fast.db. More specifically, which one to use for synthesis and which for layout? I can't find good reference to this in tsmc documents! Does tsmc have a document to explain this?
Thanks for any help.
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slow.db is low power, hight temperature, checking setup time by primetime . fast.db is hight power low temperature, checking hold time when static time analisis.
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