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 Connect macro power to top level 

Last post Wed, Feb 27 2013 7:07 AM by Kari. 1 replies.
Started by ErezBS 07 Dec 2012 12:08 AM. Topic has 1 replies and 951 views
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  • Fri, Dec 7 2012 12:08 AM

    • ErezBS
    • Top 500 Contributor
    • Joined on Tue, Nov 6 2012
    • Posts 29
    • Points 400
    Connect macro power to top level Reply

    Hi,

    I have read alot about this issue (in this forum), but still don't having some problems.

    i have power strips + power ring  in my block, and i use lefOut -stipePin in my block to generate the lef file for top level.

    i can see in the lef file the power & ground  port  (also see "use power" & "use ground", and a list of "RECT" in top layer).

    the problem is - i can't connect my top power strips to my macro block.

    i use the "globallnetconnect"  in my top level & in block level with the same names.

    the thing is when openning my top level and reading the lef, i can see the block pins but not the VDD & VSS ones.

    any idea?

    thanks!! 

     

    • Post Points: 20
  • Wed, Feb 27 2013 7:07 AM

    • Kari
    • Top 10 Contributor
    • Joined on Tue, Jul 15 2008
    • Cary, NC
    • Posts 693
    • Points 14,295
    Re: Connect macro power to top level Reply

    globalNetConnect specifies what pins are connected to which global nets, but it does not actually draw the connections. you need to use sroute for that. Here's a sample lefOut command which might work better for you (edit to reflect the layers you want):

    lefOut block}.lef -noCutObs -stripePin -pgPinLayers 1 2 3 4 5 6 7 

    • Post Points: 5
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Started by ErezBS at 07 Dec 2012 12:08 AM. Topic has 1 replies.