Fixing critical Hold violation

[wgthlp]

Hi,

I want to know how to fix a hold violation in the scenario where addition of buffer (to fix hold) causes setup violation. Is there any other way to fix this hold violation?

Thanks in advance.

 

[Simranjeet Singh]

Yes, Downsize the capture F/F.

 

[Kaisia]

Yes, Downsize the capture F/F.

why it can fix hold with no setup degration?

 

[Simranjeet Singh]

Yes, it will but downsizing is always a better approach as it will not add extra buffers in the design and according to my experience the effect of downsizing on setup is lesser than adding buffers.
Anyway the hold will affect setup violations if the setup path has very little slack.

---------- Post added at 14:22 ---------- Previous post was at 14:22 ----------

Tell me if I am wrong

 

[Kaisia]

It make sense. I will analyze the results from theories view.

 

[pradeeppiskala]

Is addition of buffer causing setup violation on the exact path violating in hold. Try to upsize the cells in setup path to high drive strength cells. Derating could could also be a factor. Check for some hold specific cells being used in the design and convert to normal cell.
Hope this helps

---------- Post added at 20:20 ---------- Previous post was at 20:19 ----------

Is addition of buffer causing setup violation on the exact path violating in hold. Try to upsize the cells in setup path to high drive strength cells. Derating could could also be a factor. Check for some hold specific cells being used in the design and convert to normal cell.
Hope this helps