Stats

  • Locked Locked
  • Replies 3
  • Subscribers 90
  • Views 14062
  • 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 avoid this problem?

archive

   I found some paths easy violation as shown in attechment after CTS. The ICG cell is traced through and the skew is balanced between A and C. But the violation easy occur between A and B(ICG cell). How do I avoid this problem?


Originally posted in cdnusers.org by Dota
Parents

  • set_clock_gating_check is here just to avoid pre-CTS optimization to be to optimistic.
    In standard flow it must be use from synthesis to CTS step.

    I aggree that CTS are no timing aware (it's a shame....), but if you can help the tool a little bit, it will give better result.
    If your Enable path is too long, for sure it will be very difficult to close timing. The only solution might be to play with usefull skew...

    Pat.


    Originally posted in cdnusers.org by bougantp
Reply

  • set_clock_gating_check is here just to avoid pre-CTS optimization to be to optimistic.
    In standard flow it must be use from synthesis to CTS step.

    I aggree that CTS are no timing aware (it's a shame....), but if you can help the tool a little bit, it will give better result.
    If your Enable path is too long, for sure it will be very difficult to close timing. The only solution might be to play with usefull skew...

    Pat.


    Originally posted in cdnusers.org by bougantp
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.