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input for generating SDF

gops
What is the input file for generating SDF?In encounter there is a command writesdf.Is SDF calculated based on extracted RC.I mean SPEF file. Please somebody tell me the exact operation running in tool background when i execute writesdf.
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  •  Navid,

     You *can* make an ict file yourself, but it's not much fun! The foundry should have this file for your process. Sometimes it's in a back-end kit, not the same place as your .lib and .lef file data. So check around or ask the foundry specifically for this file. 

    Just for a sanity check, you can look in the .lib for the inverter and see if 0.5ns is anywhere within the timing tables. I agree that's quite high for 65nm.

    - Kari 

Reply

  •  Navid,

     You *can* make an ict file yourself, but it's not much fun! The foundry should have this file for your process. Sometimes it's in a back-end kit, not the same place as your .lib and .lef file data. So check around or ask the foundry specifically for this file. 

    Just for a sanity check, you can look in the .lib for the inverter and see if 0.5ns is anywhere within the timing tables. I agree that's quite high for 65nm.

    - Kari 

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