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 Mulitple AutoCTSRootPin - how CTS engine works 

Last post Sun, Feb 23 2014 2:05 AM by Chin Cypress. 0 replies.
Started by Chin Cypress 23 Feb 2014 02:05 AM. Topic has 0 replies and 1525 views
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  • Sun, Feb 23 2014 2:05 AM

    • Chin Cypress
    • Not Ranked
    • Joined on Tue, Jun 2 2009
    • Hyderabad, Andhra Pradesh
    • Posts 8
    • Points 160
    Mulitple AutoCTSRootPin - how CTS engine works Reply

    Hi

       I need a clarification for the below issue. I have a 550k+ sinks for clk_sys. To get, better skew & insertion delay values. I found out the clock gating cells & mentioned those output as "AutoCTSRootPin" lets take CLK_GATE as clock name & has some 400k+. I mentioned those in the intial portion of the ctstch file and later my main clk "clk_sys" comes up. so, it will build for "CLK_GATE" 1st then it comes to clk_sys.

    As the result, am getting better skew & insertion for CLK_GATE But for "clk_sys" am getting worst values. My question is, once clock tree is built for "CLK_GATE". when it comes to clk_sys tree. Whether it will re-build "CLK_GATE" tree again?

    Hope my quesion is clear. Plz let me know any more brief explanation needed. 

    Rgds Chin
    • Post Points: 5
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Started by Chin Cypress at 23 Feb 2014 02:05 AM. Topic has 0 replies.