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HOLD FIX FLOW IN ENCOUNTER

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Can anyone please explain the hold fix flow to be followed in encounter. I am trying to put a dontuse on many buffer cells but they are still being used when I use the FIXHOLD and optDesign -hold command.
Also it would help if yusers could commnent  on how good is encounter in fixing Hold. What are the techniwues used by encounter to fix hold. Does it use only delay insetion in the datapath or does much more to optimize hold violations


Originally posted in cdnusers.org by mvvijay78
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  • If utilization looks like it will be a problem, we use specifyCellPad on our flops to leave room for an eventual hold-fix buffer. We've had good success with that method. Also, if FE is adding tons of buffers, you may want to revisit your hold margin and make sure it's not too unrealistic.

    - Kari


    Originally posted in cdnusers.org by Kari
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  • If utilization looks like it will be a problem, we use specifyCellPad on our flops to leave room for an eventual hold-fix buffer. We've had good success with that method. Also, if FE is adding tons of buffers, you may want to revisit your hold margin and make sure it's not too unrealistic.

    - Kari


    Originally posted in cdnusers.org by Kari
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