Stats

  • Locked Locked
  • Replies 3
  • Subscribers 63
  • Views 13899
  • 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

Timing report for a hierarchical block

Ivan de Trble

Hi everyone!

 Can anyone tell me how can I get a timing report for a net that goes through hierarchy?

In other words: the net starts at the current level then goes into a flip flop inside an instantiated custom block. I need to know the timing from the current level down to that flip flop.

 Thanks for your help.

Parents

  • Hi Ivan,

    You can certainly apply 

    set_attr break_timing_path true <hierarchical pin>

    external_delay -input <value> -clock <clock> <hierarchical pin>

    report timing -from <hierarchical pin>

     More importantly I have to ask you why you would want to do this? Individual segments of nets in synthesis will not necessarily correlate to your actual placement, especially if you are not using RC-P or a physically aware synthesis solution. 

    regards,

    gh-

Reply

  • Hi Ivan,

    You can certainly apply 

    set_attr break_timing_path true <hierarchical pin>

    external_delay -input <value> -clock <clock> <hierarchical pin>

    report timing -from <hierarchical pin>

     More importantly I have to ask you why you would want to do this? Individual segments of nets in synthesis will not necessarily correlate to your actual placement, especially if you are not using RC-P or a physically aware synthesis solution. 

    regards,

    gh-

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.