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ETS Flow CCS versus NLDM models

maliv
Hello All,

We have been using NLDM models for a long time now.Our ETS Flow tuned with NLDM models, closely compares with third party sign-off tool and the timing difference most of the times is within 2%.

However, the same flow, does not compare well with CCS models. We are seeing 3-5% timing difference between ETS and third party tool.

Can someone suggest on how CCS/ECSM correlate with silicon results. Should we definitely consider moving to CCS, if yes why?

Let me know if you need more information.

Thanks and Regards,

Mali
Parents

  • We are currently using 28hpm.

     I am comparing

     ETS + NLDM with TPT + NLDM (2% difference average for a bunch of our designs)

     ETS + CCS with TPT + CCS (3-5% difference)

     So, the comparison is based on same library models and same parasitic source files.

     So does anyone here have any data on how close CCS is with respect to silicon results. +/- any percent value on the average.

     Should we consider moving to CCS/ECSM for signoff, any strong reasons.

     Regards,

     Mali

Reply

  • We are currently using 28hpm.

     I am comparing

     ETS + NLDM with TPT + NLDM (2% difference average for a bunch of our designs)

     ETS + CCS with TPT + CCS (3-5% difference)

     So, the comparison is based on same library models and same parasitic source files.

     So does anyone here have any data on how close CCS is with respect to silicon results. +/- any percent value on the average.

     Should we consider moving to CCS/ECSM for signoff, any strong reasons.

     Regards,

     Mali

Children
No Data

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