1 Reply Latest reply on Oct 16, 2008 11:05 PM by Wahbi

    LVS extraction: extracting different net name as single net ?

    nagaraj.kumbar

       

      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)