• 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. Layout XL: "Connectivity->Update->Components and Nets" resets...

Stats

  • Locked Locked
  • Replies 7
  • Subscribers 126
  • Views 9248
  • 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

Layout XL: "Connectivity->Update->Components and Nets" resets all my pins

PNadeau
PNadeau over 10 years ago

Dear folks,

Sometimes I make a few schematic changes and then in Layout XL I use Connectivity->Update->Components And Nets to update the Layout connectivity.  I select "Update nets and Instance name mismatches only" and "Update Net Signal Type" and click OK.

When I do this, the tool moves all of the pins I have already placed to the lower left-hand corner of the layout, despite nothing really changing on most of these nets, causing me to have to place them all again.

Is there a way to prevent this behaviour?  Ideally I'd like to leave most of the pins alone if nothing has changed on those nets.

If it's relevant, the pins were initially placed using Connectivity->Generate->Selected From Source, and using the "Unplaced" and "Place Individually" mode.  The pin and label are placed on the "pin" LPP for the relevant metal.

IC6.1.6.101, RHEL 6

Thanks in advance.

Cheers,
Phil

  • Cancel
Parents
  • ColinSutlieff
    ColinSutlieff over 10 years ago

    Hi Phil,

    One last suggestion:

    Check if the pins have a property called "lxPlacementStatus"

    If yes, delete the property

    This may fix the problem.

    It seems that this property gets generated when you use the generate->selected from source ( with option "place individually" set)

    This happened in earlier releases.

    Let us know if this fixes the problem

     

    Colin

    • Cancel
    • Vote Up 0 Vote Down
    • Cancel
Reply
  • ColinSutlieff
    ColinSutlieff over 10 years ago

    Hi Phil,

    One last suggestion:

    Check if the pins have a property called "lxPlacementStatus"

    If yes, delete the property

    This may fix the problem.

    It seems that this property gets generated when you use the generate->selected from source ( with option "place individually" set)

    This happened in earlier releases.

    Let us know if this fixes the problem

     

    Colin

    • Cancel
    • Vote Up 0 Vote Down
    • Cancel
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.

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

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