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Other CAD Tools >> Physical Verification, Extraction and Analysis >> Assura LVS: issue with hierarchy
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Message started by rho on Sep 13^th, 2012, 7:24am

Title: Assura LVS: issue with hierarchy
Post by rho on Sep 13^th, 2012, 7:24am

I'm running Assura LVS on the analog part of the design.
I have to flatten some cells in the layout to get a match between schematics and layout. So I tried to use the ?flattenCellContents option in the avParameters.
I kept the hierarcy in the layout as is and activated the ?flattenCellContents (I checked the " use in run" box and filled in the list of cells to flatten).
This improved the results, but it didn't yield the same results as when I actually flatten the cells (one level) in the layout.

Does anyone have any idea why the flattening of the hierarchy via Assura avParameters gives different results then actually flattening the cells in the layout-view.

I've done a comparison between the layout with flattened cells and the one where I let Assura do the flattening during the check and there were no mask differences to be found. So only the hierarchy of the design was different.

I'm using Virtuoso IC6.1.5.500.11

Title: Re: Assura LVS: issue with hierarchy
Post by boe on Sep 18^th, 2012, 3:14am

Rho,
try expandOnError or expandCellToParent.

Hope this helps.

- B O E