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Virtuoso XL: how to remove instance pin from net?

caver456

I'm using XL layout on a layout that was initially created in L and has no connectivity source.

Most of the layout work for this cell has been completed in L with no connectivity, so, I'm just using XL to create some nets within the already-completed-layout region (by assigning a net name in the Connectivity tab of the Edit Properties form for a shape in the completed area), and add some instance pins from the not-yet-laid-out region (using Connectivity -> Assign) to those nets, to get the flight lines and drag lines.

This is a big help, but, how can I remove an instance pin from a net, i.e. in case I screw up during the assignment?

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  • Alex Soyer

    Hello,

    You have two ways:

    1. You can use the Property Editor Assistant
      1. select the instance
      2. Go to the property editor assistant (bring it form Window > Assistant menu if necessary)
      3. In the right drop down menu choose "Connectivity"
      4. Now you can change the instance terminals connectivity
    2. You can use Connectivity > Nets > Propagate
      1. Remove the net assigned to that terminal or
      2. Click on Clear All Net Names button
      3. Don't forget to click on "Apply" or "OK"

    I hope this helps.

    Thanks,

    Alex

Reply
  • Alex Soyer

    Hello,

    You have two ways:

    1. You can use the Property Editor Assistant
      1. select the instance
      2. Go to the property editor assistant (bring it form Window > Assistant menu if necessary)
      3. In the right drop down menu choose "Connectivity"
      4. Now you can change the instance terminals connectivity
    2. You can use Connectivity > Nets > Propagate
      1. Remove the net assigned to that terminal or
      2. Click on Clear All Net Names button
      3. Don't forget to click on "Apply" or "OK"

    I hope this helps.

    Thanks,

    Alex

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