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can LEC provide cdc check?

zhiweiwu0318

Who can kindly tell me which rule is cdc(cross domain check) in LEC? i can't find any clue in the document.

by the way, i used IFV for cdc, but it can't provide all un-synchronizer singals, oops!

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  • arthurwu

      Now I have some concept about CDC, thank you very much!
      For cdc check, i think how to set clock_domain rule depends on clock definition in time analysis( like PT) script. We must check those signal transfer where PT do it as false path.
      Another question: how to use command "add clock association", i am confused about term "pathname", i can't find any command example in the user guide, it needs improvement.
      Take an example: there is a mux in my design, 2 inputs are clk_a and clk_b, output is clk_out. clk_a and clk_b is port, and the mux's father module is module_a.module_b, so can i use command as "add clock association clk_a module_a.module_b.clk_out"? It's fail in the Conformal with log "Error: Invalid argument".
      Thank you in advance!

     

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  • arthurwu

      Now I have some concept about CDC, thank you very much!
      For cdc check, i think how to set clock_domain rule depends on clock definition in time analysis( like PT) script. We must check those signal transfer where PT do it as false path.
      Another question: how to use command "add clock association", i am confused about term "pathname", i can't find any command example in the user guide, it needs improvement.
      Take an example: there is a mux in my design, 2 inputs are clk_a and clk_b, output is clk_out. clk_a and clk_b is port, and the mux's father module is module_a.module_b, so can i use command as "add clock association clk_a module_a.module_b.clk_out"? It's fail in the Conformal with log "Error: Invalid argument".
      Thank you in advance!

     

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