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how to fix transition on excluded net?

dota

In encounter, optDesign -drv can help us fix transition, but some nets are excluded. how to report those net? If I want to fix some transition on excluded net, how to do?

ps: sometimes optDesign -selectedNets can help me to fix some excluded net, but sometimes not.

 

Dota

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  • reportIgnoredNets report only special net is ignored. optDesign exclude nets include special net and clock net.

    which command can report all clock net? or write a script by myself to capture these nets.

    You may ask why clock net has transition violation after CTS. I think the root point of clock created in sdc is not alway same as the begin point of clock tree defined in *.ctstch file. so some nets may contain clock attribute without  be considered in CTS.

    If it haapen, how to deal with it.

    thanks

    Dota

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  • reportIgnoredNets report only special net is ignored. optDesign exclude nets include special net and clock net.

    which command can report all clock net? or write a script by myself to capture these nets.

    You may ask why clock net has transition violation after CTS. I think the root point of clock created in sdc is not alway same as the begin point of clock tree defined in *.ctstch file. so some nets may contain clock attribute without  be considered in CTS.

    If it haapen, how to deal with it.

    thanks

    Dota

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