Stats

  • Locked Locked
  • Replies 5
  • Subscribers 126
  • Views 15910
  • 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

Assura extraction to ignore certain cells

kawan

 Hello,

I am trying to run an extraction of  a top level cell(say "test_top"). Hoever there is another cell inside ("Cell1") that I do not wish to extract.My expectation is I get get a extracted view called "av_extracted_C" which I can refer to in the hierarchy editor of the top level testbench ("test_top_testbench"). So  "test_top_testbench" has among other things,  the cell  "test_top". In the hierarchy editor I was expecting to use the view "av_extracted_C" for "test_top". I then expect the hierarchy editor to also show "Cell1" and have me select the desired view. Problem is this is not happening.

Assura > Run LVS .. Here I selected "Modify avParameters" to set it up as ?ignoreCell (  cell("Cell1 layout CAL")  ) but that did not work. 

Then I tried  ?preserveCells (  cell("Cell1") excludeCell("Cell1") ) ... but that did not work as well.

 

Any ideas? 

Thanks

zakir

 

Parents

  • Hi zakir

    Do you mean that QRC is still flattening a particular cell and not preserving it in the extracted view? The problem most probably lies in the LVS. It could already have been expanded in order to achieve LVS match. This means that it has already been flattened during LVS. QRC can only give whatever it receives from LVS, it cannot restore a flattened cell. You might want to check Assura LVS report to confirm this.

    Best regards
    Quek

Reply

  • Hi zakir

    Do you mean that QRC is still flattening a particular cell and not preserving it in the extracted view? The problem most probably lies in the LVS. It could already have been expanded in order to achieve LVS match. This means that it has already been flattened during LVS. QRC can only give whatever it receives from LVS, it cannot restore a flattened cell. You might want to check Assura LVS report to confirm this.

    Best regards
    Quek

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.