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How to use Join Nets Function in Cadence PVS-LVS

pz5921087
Hello,

I would like to make virtual connection between two same nets while the name are different. I can find joint nets function in Assura but not in PVS, is anybody know how to do this in PVS?

Thank you
  • Andrew Beckett

    Best place to start is to search in the PVS documentation for "virtual". If using the PVS UI, it would be under the LVS Options (or DRC Options, or ERC options, etc), in the "Text and Connect" tab. There's a block there labelled "Virtual Connect" with the options to control this.

    In the reference manual, there's a virtual_connect rule which does the same thing.

    Regards,

    Andrew.

  • pz5921087

    Hi Andrew.

    Thanks for your answer. I am using PVS GUI. I still dont know how to connect two nets here, for instance, I have a nets named A and the other is B, how to virtually connect them, which options should I choose? 

    Thanks 

  • Andrew Beckett

    I believe PVS can only create virtual connections between nets named with the same name (which is generally what you'd use it for; if the names are different, then presumably they're different on the schematic too, so joining them wouldn't be necessary to get LVS clean).

    Regards,

    Andrew.

  • Nag123

    Hi ,

    My situation is different , I have two pads with different net names but which are shorted at RDL level, but in the netlist they are different names and DFT team wanted them for simulation debug, so in lvs I just want to tell the pvs that these two nets are (let's say wake_up signal and matrix1   signal) same don't see them as shorted, similar like MSUB, any idea how to do it??

    Thanks,

    Nagendra.

  • Andrew Beckett
    Nagendra,

    As I said before, I don't think this is possible. It may have changed since I looked last though - I suggest you contact customer support so that if it's not possible, an enhancement CCR can be filed.

    Kind Regards,

    Andrew.

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