Stats

  • Locked Locked
  • Replies 3
  • Subscribers 91
  • Views 14916
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

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

Parents
  • dota

    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

Reply
  • dota

    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

Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.