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 Encounter power rail short 

Last post Fri, Jul 5 2013 5:52 AM by Thodoros. 3 replies.
Started by Thodoros 24 May 2013 05:38 AM. Topic has 3 replies and 879 views
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  • Fri, May 24 2013 5:38 AM

    • Thodoros
    • Top 500 Contributor
    • Joined on Tue, Oct 6 2009
    • Patra, Athens Greece
    • Posts 34
    • Points 485
    Encounter power rail short Reply

    Hello,

    I am trying to place a big macro in encounter. The macro has its first and last power rail of type vdd!.

    By default it is placed starting from the gnd! special route rail. So I have a short as shown at the attached picture.

    I think that this problem origins from the abstract tool, where I  have the "cell has no power terminals" message (abs-1086, abs-1087).

    Even though I manually add at the abstract design a vdd! pin of layer purpose metal1 net,  and export the lef of the macro again (the vdd! pin is included) the problem remains.

    Can you please help me overcome this situation?

    Thanks,

    Thodoros


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    • Post Points: 20
  • Thu, Jun 13 2013 5:37 AM

    • Quek
    • Top 10 Contributor
    • Joined on Wed, Oct 14 2009
    • Singapore, 00-SG
    • Posts 1,051
    • Points 15,990
    Re: Encounter power rail short Reply

    Hi Thodoros

    Would you please re-post your question in the digital implementation forum? This forum is for custom design tools such as Virtuoso.

    Best regards
    Quek

    • Post Points: 20
  • Thu, Jun 13 2013 5:51 AM

    Re: Encounter power rail short Reply

     It's OK, I'll move it. For some reason I don't think I got the email notification of this post, so I missed it - normally I move such incorrectly posted threads when I see them.

    Regards,

    Andrew.

    • Post Points: 20
  • Fri, Jul 5 2013 5:52 AM

    • Thodoros
    • Top 500 Contributor
    • Joined on Tue, Oct 6 2009
    • Patra, Athens Greece
    • Posts 34
    • Points 485
    Re: Encounter power rail short Reply

     Hello,

    Just to close this post,

    I had the vdd-gnd short on the big macro because I did not create pins for the vdd and gnd of the macro.
    Just used label names of metal1 dg for these rails , that was ok for assura but lead to a short at encounter.

    Thanks,

    Thodoros

    • Post Points: 5
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Started by Thodoros at 24 May 2013 05:38 AM. Topic has 3 replies.