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 Creating an AutoLayout 

Last post Wed, Mar 18 2009 7:24 AM by Austin CAD Guy. 1 replies.
Started by stuso 17 Mar 2009 07:22 AM. Topic has 1 replies and 1524 views
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  • Tue, Mar 17 2009 7:22 AM

    • stuso
    • Top 100 Contributor
    • Joined on Mon, Nov 3 2008
    • Posts 77
    • Points 1,315
    Creating an AutoLayout Reply

    Hi there,

    first off does anyone use the 5141 floorplanning tool (Virtuoso Preview), i just wonder if its widely used and therefore useful.

    Secondly does it require that each pCell has some sort of macro/size information?

    I should expalin my starting point is a schematic called:

    test_cell

    which contains:

    cella, cellb, cellc & celld

    each of these 4 sub-cells contains some pCells.

    I tried from the CIW doing:

    export -> PRFlatten

    So far i'm getting errors like:

     Cannot find switch master cell for instance M0 in cellView (cellA schematic) from viewlist 'autoAbstract abstract schematic netlist ' in library 'stu_PREVIEW_FLOORPLAN'.

    Where M0 is a pCell inside cellA.

    Appreciate any feedback.

    thanks

    Stu

     

     

    • Post Points: 20
  • Wed, Mar 18 2009 7:24 AM

    Re: Creating an AutoLayout Reply

     Hi Stu

    It has been a while since I used Preview as I am concentrating on IC6.1. The issue you see is exactly what you suspect, the prFlatten switch list does not know how to handle pcells. I don't know if this will work but you may want to add the view "layout" to the end of the switch list. You also must have a prBoundary in the pcell in order tor it to be recognized in the area calculations. I do not have any data to test this option so give it a try and good luck.

     Ted

    • Post Points: 5
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Started by stuso at 17 Mar 2009 07:22 AM. Topic has 1 replies.