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Computer Aided Design - CAD > Cadence > LVS and Shorts ...
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LVS and Shorts in Virtuoso schematics?

by Andreas <cad_group.20.hinz@[EMAIL PROTECTED] > Apr 29, 2008 at 05:27 PM

Hello,

I've got a synthesized verilog netlists containing statements, which 
connect signals to logic high or low, e. g.

assign xy = 1'b0;    //The net xy is tied to gnd (logic low).

The problem is that I have no tiehi or tielo cells in my synthesis 
libraries.

After im****ting the verilog netlist as a Virtuoso schematic into CDE, 
these verilog assignments are replaced. Sometimes they're replaced by a 
"cds_thru" cell from the "basic" library and sometimes by "short" cell 
from the designkit. I don't understand why two different cells are used.

The real Problem occurs, when I want to do a LVS. The LVS tool tells me 
that it can not find the "cds_thru" or "short" cells in the layout. LVS 
results incorrect, although the layout is correct.

What can I do?

I already searched for an lvsIgnore property, but the "cds_thru" and 
"short" cells don't have one.

Thanks for your help,

Andreas
 




 9 Posts in Topic:
LVS and Shorts in Virtuoso schematics?
Andreas <cad_group.20.  2008-04-29 17:27:38 
Re: LVS and Shorts in Virtuoso schematics?
"S. Badel" <  2008-04-29 17:32:50 
Re: LVS and Shorts in Virtuoso schematics?
Riad KACED <riad.kaced  2008-04-29 15:42:23 
Re: LVS and Shorts in Virtuoso schematics?
Andreas <cad_group.20.  2008-04-30 10:59:14 
Re: LVS and Shorts in Virtuoso schematics?
Andrew Beckett <andrew  2008-04-30 11:45:53 
Re: LVS and Shorts in Virtuoso schematics?
"S. Badel" <  2008-04-30 17:40:18 
Re: LVS and Shorts in Virtuoso schematics?
Andrew Beckett <andrew  2008-05-01 13:55:34 
Re: LVS and Shorts in Virtuoso schematics?
Riad KACED <riad.kaced  2008-04-30 17:11:48 
Re: LVS and Shorts in Virtuoso schematics?
Riad KACED <riad.kaced  2008-04-30 17:14:45 

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tan12V112 Mon Dec 1 21:11:46 CST 2008.