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 Dummy Pins short errors IO corner pads 

Last post Wed, Mar 27 2013 8:26 AM by Kari. 3 replies.
Started by amythpai 25 Mar 2013 02:37 AM. Topic has 3 replies and 705 views
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  • Mon, Mar 25 2013 2:37 AM

    • amythpai
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    • Joined on Sun, Mar 17 2013
    • Lannion, Cotes-dArmor
    • Posts 14
    • Points 220
    Dummy Pins short errors IO corner pads Reply

    Hello,

    I donot have much Experience in Place and route operation. The problem is that I have completed the place and routing of the core area as well as the IO pads. When I run DRC verify geometry I have no violations in the core  area but in the Corner IO pads I get two short erros ( LeftBottom and Top right corner pads) in the dummy cell pins. It looks strange because even other two corners have the same dummy Pins but there are no short errors. The two Violations I am getting are

    SHORT: Pin of Cell io_pad_left_bottom_corner & Blockage of Cell fillperi_S_0  ( M3 )

    Bounds : ( 112.000, 1.900 ) ( 112.000, 2.100 )

    SHORT: Pin of Cell io_pad_right_top_corner & Blockage of Cell fillperi_N_78  ( M3 )

    Bounds : ( 1568.200, 1503.300 ) ( 1568.200, 1503.500 ) 

     

    Can anyone please advise me on how to fix it.? 

    • Post Points: 20
  • Tue, Mar 26 2013 10:44 AM

    • Kari
    • Top 10 Contributor
    • Joined on Tue, Jul 15 2008
    • Cary, NC
    • Posts 685
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    Re: Dummy Pins short errors IO corner pads Reply
    can you post a picture of the violation? it's likely false, but hard to tell without a picture.
    • Post Points: 20
  • Wed, Mar 27 2013 7:40 AM

    • amythpai
    • Not Ranked
    • Joined on Sun, Mar 17 2013
    • Lannion, Cotes-dArmor
    • Posts 14
    • Points 220
    Re: Dummy Pins short errors IO corner pads Reply
    • Post Points: 20
  • Wed, Mar 27 2013 8:26 AM

    • Kari
    • Top 10 Contributor
    • Joined on Tue, Jul 15 2008
    • Cary, NC
    • Posts 685
    • Points 13,610
    Re: Dummy Pins short errors IO corner pads Reply
    my guess is that your IO filler cells don't have the pwr/gnd rails continued through them in the LEF (they layout should be fine). so we get this "violation" of the pwr/gnd pin in the corner cell when it touches the blockage of the filler cell. if your signoff DRC runs clean in this area, then you can ignore these in verifyGeometry.
    • Post Points: 5
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Started by amythpai at 25 Mar 2013 02:37 AM. Topic has 3 replies.