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 Follow rails for empty rows. 

Last post Thu, Aug 20 2009 1:44 PM by Kari. 3 replies.
Started by deeps 18 Aug 2009 02:52 AM. Topic has 3 replies.
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  • Tue, Aug 18 2009 2:52 AM

    • deeps
    • Top 500 Contributor
    • Joined on Tue, Sep 2 2008
    • Posts 16
    • Points 245
    Follow rails for empty rows. Reply

    Hi,

     I am trying to create the follow rails using encounter.

       but when i use the sroute command, it does not create the follow rails for the empty rows,

       How can i control this??

     

     

    thanks

    deepak.

    • Post Points: 20

  • Tue, Aug 18 2009 9:01 AM

    • Kari
    • Top 10 Contributor
    • Joined on Tue, Jul 15 2008
    • Cary, NC
    • Posts 651
    • Points 12,995
    Re: Follow rails for empty rows. Reply

     Check your sroute command for the option  -corePinNoRouteEmptyRows. You may have this accidentally turned on.

    • Post Points: 20

  • Wed, Aug 19 2009 5:35 AM

    • deeps
    • Top 500 Contributor
    • Joined on Tue, Sep 2 2008
    • Posts 16
    • Points 245
    Re: Follow rails for empty rows. Reply

     
     Hi Kari,

          I have set the corePinNoRouteEmptyRows to "off" but still its not creating follow rails for some empty,(not at all empty rows, follow rails are created at some places where the rows are empty)

             There is no blockage or any kind of obstruction , but still its not able to create  follow rail only in some particular loacation.

                     Do you any idea as what could be the problem.

     

    thanks

    deepak.
    • Post Points: 20

  • Thu, Aug 20 2009 1:44 PM

    • Kari
    • Top 10 Contributor
    • Joined on Tue, Jul 15 2008
    • Cary, NC
    • Posts 651
    • Points 12,995
    Re: Follow rails for empty rows. Reply

     Deepak,

     

    I'm not sure what could be going on. Could you try drawing in a followpin by hand in one of these areas and see if  you get any DRC violations? Sometimes it's not obvous why sroute won't draw in a certain area and this can help find out. Also, if you flood your core with filler cells and then route your followpins, does it work then? 

    - Kari

    • Post Points: 5
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Started by deeps at 18 Aug 2009 02:52 AM. Topic has 3 replies.