what is the effect of crosstalk in the common clock path on setup and hold between a REG2REG path ?

helloPDworld

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I always thought there is no effect of crosstalk on common path for setup and hold as common path delay is not factored in setup and hold equations. Isn't that so ?
 

Crosstalk can introduce timing uncertainty in the clock edge arrival times due to delay variations.
This jitter affects the effective clock period for setup and hold checks, reducing timing margins.
 

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