Re: ocv
PrimeTime offers three analysis modes with respect to operating conditions, called the single, best-case/worst-case, and on-chip variation modes:
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In the single operating condition mode, PrimeTime uses a single set of delay parameters for the whole circuit, based on one set of process, temperature, and voltage conditions.
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In the best-case/worst-case mode, PrimeTime simultaneously checks the circuit for the two extreme operating conditions, minimum and maximum. For setup checks, it uses maximum delays for all paths. For hold checks, it uses minimum delays for all paths. This mode lets you check both extremes in a single analysis run, thereby reducing overall runtime for a full analysis.
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In the on-chip variation mode, PrimeTime performs a conservative analysis that allows both minimum and maximum delays to apply to different paths at the same time. For a setup check, it uses maximum delays for the launch clock path and data path, and minimum delays for the capture clock path. For a hold check, it uses minimum delays for the launch clock path and data path, and maximum delays for the capture clock path.