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Typical Overflow ?

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Hi,

I just wonder how much is the typical horizontal and vertical overflow so that the design be routable. I think this should depend on the number of metal layers in the design, I am using 6 metal layers in my design.

Thanks,

Houman



Originally posted in cdnusers.org by houmanh
Parents

  • Houman,

    I would try to figure out why you're getting the .3V in trialRoute. I always look at the "thermal" congestion map after a trialRoute. In 6.2, on the All Colors form, in the View Only tab, turn on Horizontal Congest and Vertical Congest (or in your case, just turn on vertical). The "hotter" the color, the more congestion. Pink and white are very bad. Usually I will see this in an area that can be fixed by a floorplan modification. In versions prior to 6.2, you didn't have to open All Colors to turn these on. They were just on the side, called HCongest and VCongest.

    I don't usually look at the nanoroute overcon numbers, so I'm sorry I don't have any advice there. :-)

    - Kari


    Originally posted in cdnusers.org by Kari
Reply

  • Houman,

    I would try to figure out why you're getting the .3V in trialRoute. I always look at the "thermal" congestion map after a trialRoute. In 6.2, on the All Colors form, in the View Only tab, turn on Horizontal Congest and Vertical Congest (or in your case, just turn on vertical). The "hotter" the color, the more congestion. Pink and white are very bad. Usually I will see this in an area that can be fixed by a floorplan modification. In versions prior to 6.2, you didn't have to open All Colors to turn these on. They were just on the side, called HCongest and VCongest.

    I don't usually look at the nanoroute overcon numbers, so I'm sorry I don't have any advice there. :-)

    - Kari


    Originally posted in cdnusers.org by Kari
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