• Skip to main content
  • Skip to search
  • Skip to footer
Cadence Home
  • This search text may be transcribed, used, stored, or accessed by our third-party service providers per our Cookie Policy and Privacy Policy.

  1. Community Forums
  2. Custom IC Design
  3. DSPF black box

Stats

  • Locked Locked
  • Replies 3
  • Subscribers 126
  • Views 9642
  • 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

DSPF black box

Pirate King
Pirate King over 2 years ago

The DSPF include option in Explorer Simulation Files Setup has a "black box" option. I have a DSPF extraction which contains a sub-cell which i don't want extracted. When i use this option i get the usual dspf_include statement at the end of the netlist but now with blackbox="blah blah" which seems promising. The run results dont show any evidence that the sub-cell was taken as schematic and the output log has the statement "Subckt 'blah' defined in file 'input.scs' will be replaced with subckt 'blah' specified in DSPF file 'blah blah'.  but i don't see any mention of the sub-block taken as schematic.

L

  • Cancel
Parents
  • Andrew Beckett
    Andrew Beckett over 2 years ago

    Did you run the LVS and extraction such that the block was black-boxed too? There needs to be an instance of the block in the DSPF file for this to work.

    It's probably best if you contact customer support for this, as seeing the setup would really help.

    Andrew

    • Cancel
    • Vote Up 0 Vote Down
    • Cancel
  • Pirate King
    Pirate King over 2 years ago in reply to Andrew Beckett

    So i deleted the extracted sub-block lines from the DSPF file and inserted a call to the schematic version. Seems to work. It gives same result as pinning  the sub-block out of the extraction by placing it higher in the schematic hierarchy

    • Cancel
    • Vote Up 0 Vote Down
    • Cancel
Reply
  • Pirate King
    Pirate King over 2 years ago in reply to Andrew Beckett

    So i deleted the extracted sub-block lines from the DSPF file and inserted a call to the schematic version. Seems to work. It gives same result as pinning  the sub-block out of the extraction by placing it higher in the schematic hierarchy

    • Cancel
    • Vote Up 0 Vote Down
    • Cancel
Children
  • Ashwin Rebello
    Ashwin Rebello over 2 years ago in reply to Pirate King

    I see you have got this to work by a bodge, did you ever get the black box function to work correctly

    • Cancel
    • Vote Up 0 Vote Down
    • Cancel

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.

© 2025 Cadence Design Systems, Inc. All Rights Reserved.

  • Terms of Use
  • Privacy
  • Cookie Policy
  • US Trademarks
  • Do Not Sell or Share My Personal Information