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LVS extraction: extracting different net name as single net ?

Question asked by nagaraj.kumbar on Oct 16, 2008
Latest reply on Oct 16, 2008 by Wahbi

 

In my design I have a macro and it has 3 power pins and 3 ground pins on M7.  

 

 

All these three power pins are named as

 

 

VSSA_1 VSSA_2 VSSA_3

 

 

VDDA_1 VDDA_2 VDDA_3

 

 

 

 

 

Internal to macro all these power network are different, means they are all independent power network.

 

 

 

 

 

But in top level a single net is shorting these nets.

 

 

 

 

 

VDDA_TOP connected to pins VDDA_1 VDDA_2 VDDA_3

 

 

VSSA_TOP connected to pins VSSA_1 VSSA_2 VSSA_3

 

 

 

 

 

From toplevel the edtext is given on top level port. and the  macro has text labels on its pins

 

 

During extraction the calibre reports the shorts. between VDDA_TOP VDDA_1 VDDA_2 VDDA_3

 

 

and VSSA_TOP VSSA_1 VSSA_2 VSSA_3

 

 

 

 

 

Since I know that the nets VDDA_TOP VDDA_1 VDDA_2 VDDA_3 are shorted.

 

 

How to pass this information to the lvs extraction? ( attached is a example snap)

 

 

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