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AOCV Derates are not used for SDF gneration

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curty

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I have a query regarding SDF generation. For STA , cell & net derates are used in timing closure, But for SDF generation & load/slew checks derates are not used ?
What could be the reason ?
 

mail4idle2

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If I need to get derate values also in SDF generation I need to capture launch path and capture path, other lot of things has to be stored which is not possible.
Generally with sdf what you have, need to run GLS at higher frequency to make sure we have margins with derates.
 
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curty

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Makes sense . But still whatever delays are seen in actual STA & whatever are there in SDF there will be a big difference . Should some extra margin be included in sdf for better correlation ..
Also for slew & load checks cell & net derates are not used. What is the reason for this ?
 

curty

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For slew & load checks cell & net derates are not used. What is the reason for this ?
 

mail4idle2

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Slew and Load checks on nets. Why do we need to consider cell delays ?
For nets Delay will come only when timing is getting checked.
 

curty

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For slew & load checks, cell derates & net derates are not used. But in timing checks derates are used ..
What is the reason for this ?
 

curty

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For slew & load checks, cell derates & net derates are not used. But in timing checks (setup/hold) derates are used ..
What is the reason for this ?
 

curty

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Is there somebody who can answer this ? This is related to C28 Technology where STA is done using PBA-AOCV.
For slew & load checks, cell derates & net derates are not used. But in timing checks (setup/hold) derates are used ..
What is the reason for this ?
 

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