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On Chip Variation OCV

smachha

Hi all,

Can some one explain What is OCV ? I am confused that, 

--> applying derates is what OCV is ? or 

--> using two different libs for same (setup/hold) analysis for launch and capture is OCV ?

and What is the MMMC ?

 

Thanks,

smachha.

Parents
  • Scrivner

    OCV is "On-Chip-Variation" and refers to the variation in timing due to process variations which is not easily modeled. The Encounter tools provide an OCV mode where launch and capture paths use different timing libraries during timing analysis to give a worst case scenario which should take into account OCV effects.

    MMMC is "Multi-Mode-Multi-Corner" and refers to an Encounter  tool methodology where multiple design modes (for example: functional mode, scan shift mode, scan capture mode) and multiple timing corners can be analyzed and optimized simultaneously.

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  • Scrivner

    OCV is "On-Chip-Variation" and refers to the variation in timing due to process variations which is not easily modeled. The Encounter tools provide an OCV mode where launch and capture paths use different timing libraries during timing analysis to give a worst case scenario which should take into account OCV effects.

    MMMC is "Multi-Mode-Multi-Corner" and refers to an Encounter  tool methodology where multiple design modes (for example: functional mode, scan shift mode, scan capture mode) and multiple timing corners can be analyzed and optimized simultaneously.

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