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 CTS error 

Last post Tue, Jan 8 2013 7:04 AM by saikrishna. 6 replies.
Started by libinpk 08 Jul 2010 04:54 AM. Topic has 6 replies and 3092 views
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  • Thu, Jul 8 2010 4:54 AM

    • libinpk
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    • Joined on Mon, May 10 2010
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    • Points 55
    CTS error Reply

    Hi, 

     Im gettin the following during my cts. Can anyone explain what the error and how to get over it? Im using 8.1 Encounter. Any help is greatly appreciated..

     

    Tracing Clock abc/OSOUT ...

    ** Pin xyz/core/TEST_MUX/p214748365A109/YB is a crossover pin between Clock asdf/CLKOA and abc/OSOUT

    --- Overlapped subtree rooted at xyz/core/TEST_MUX/p214748365A/YB:

    Excluded Term xyz/core/TEST_MUX/p214748365A109/BB is found in clock abc/OSOUT but NOT in clock asdf/CLKOA.

    --- Overlapped subtree at xyz/core/TEST_MUX/p214748365A/YB has different number of children (gates) The common subtree rooted at xyz/core/TEST_MUX/p214748365A/YB between crossover clocks (abc/OSOUT) and (asdf/CLKOA) has inconsistent constraints.

    CTS cannot proceed. Please check the clock spec files and re-start CTS again

     

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  • Thu, Jul 8 2010 7:32 AM

    • Kari
    • Top 10 Contributor
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    • Cary, NC
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    Re: CTS error Reply

    I just had something similar happen in my design.

    You have two converging clocks, which in itself is not a problem, but one of the clocks has an exclude pin and the other does not. Look in your clock spec file at the two clocks mentioned. Find the one that has the ExcludePin setting and copy that to the definition for the other clock. Then rerun CTS.

     

    • Post Points: 20
  • Thu, Jul 8 2010 9:48 PM

    • libinpk
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    Re: CTS error Reply

     Kari,

        1. This is my first run. I generated clock spec using clockDesign command. It doesnot have any "Excluded pins" in it. As i see from the cts log, i think the tool is assigning "Excluded pins" by itself wherever necessary. Am I right?

        2. And in the case of converging clock, only one of the pin should be an "Excluded pin", right? Why declare the other one also as an "Excluded pin"?

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  • Mon, Aug 16 2010 10:27 AM

    • Kari
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    Re: CTS error Reply

     Were you able to solve your issue? If the clock converges, that means it's the same path as another clock. You can't have a pin both included and excluded in the same clock path.

    • Post Points: 20
  • Mon, Dec 31 2012 6:39 AM

    • saikrishna
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    Re: CTS error Reply

    Hi karl

                I have two converging clocks and i want to build tree using one clock and i want to keep other as excluded pin

                         By keeping so i am getting error as inconsistent constraints

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  • Mon, Jan 7 2013 11:16 PM

    • nannasin28
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    Re: CTS error Reply
    You can't have a pin both included and excluded in the same clock path.
    PT100
    http://www.hqew.net
    • Post Points: 20
  • Tue, Jan 8 2013 7:04 AM

    • saikrishna
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    Re: CTS error Reply

    Hi nannasin

    Thans for your response 

    I excluded that pin in one clock path because i want build it using another clock but still i am getting the issue

    • Post Points: 5
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Started by libinpk at 08 Jul 2010 04:54 AM. Topic has 6 replies.