just need a clarification on setup time fixing

[sp3]

doubt on timing

Hi all,

just need a clarification on setup time fixing.

Is it possible to fix the setup time violation by adding delay buffers on the clock path (so that data gets enough time to arrive at the capturing FF). ??

Thanks,
sp3

 

[useless_skew]

Re: doubt on timing

It can fix the setup time but it will introduce some undesirable clock skew affecting the timing of the next stage.

 

[sunilbudumuru]

doubt on timing

Hello Friend,

Yes it can fix the setup viol. But it is not always preferable as mentioned by our member, useless_skew.

Focus mainly on the minimizing the combo delay in that path. Minimizing the combo delay can be by
1. modifyng the logic without effecting the functionality.
2. Upsize/Down sizing the cells in that path.
3. Optimal fanout by replicating the logic..

But yes, until the adding buffers in the clock path (increasing the skew) doesnt effect the timing in any other stages, you can add buffers.

Hope this answers to your question.

Regards,
Sunil Budumuru

 

[sp3]

Re: doubt on timing

Thanks a lot for your replies

sp3