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 LVS assura error "Unbound Pin" 

Last post Wed, Feb 5 2014 12:23 AM by Marc Heise. 1 replies.
Started by KipD 04 Feb 2014 09:41 PM. Topic has 1 replies and 2576 views
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  • Tue, Feb 4 2014 9:41 PM

    • KipD
    • Not Ranked
    • Joined on Wed, Feb 5 2014
    • Posts 1
    • Points 20
    LVS assura error "Unbound Pin" Reply


    I'm currently completing my first layout, and getting errors on all my pins.  When I run LVS I am getting an error on each saying "Unbound Pin".  

     I have simply placed the pins that were automatically generated in layout XL (when I generated the layout from schematic) within the appropriate metal layer.  When I purposefully place them on the wrong metal they blink, so I'm sure they are linked to the schematic.  

     I am sure there is a very simple explanation for this.. but just struggling to get to the bottom of it.

     Many thanks,



    • Post Points: 20
  • Wed, Feb 5 2014 12:23 AM

    • Marc Heise
    • Top 100 Contributor
    • Joined on Mon, May 4 2009
    • Feldkirchen, Bavaria
    • Posts 77
    • Points 1,310
    Re: LVS assura error "Unbound Pin" Reply

     Hi Kyle,


    are all pins unbound or only one or two? Could you write out the schematic and layout netlists  from the debug interface to check which pins are missing?  Some LVS ruledecks require labels on the pins, do you have a text label on them?

    Unbound simply means that there is a pin on one side (schematic) which could not be found on the other side (layout). Now you have to find the reason why it did not find your pins.

    Kind regards,


    • Post Points: 5
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Started by KipD at 04 Feb 2014 09:41 PM. Topic has 1 replies.