Clock jitter on hold check

[identical]

Why doesn't clock jitter affect the hold check? Doesn't data have to be held stable after a given amount of time after a rising edge of the clock? If they leading clock edge arrives too late doesn't that mean it could violate the hold time.

 

[ThisIsNotSam]

what exactly are you calling clock jitter? because uncertainty clearly affects hold check.

 

[identical]

what exactly are you calling clock jitter? because uncertainty clearly affects hold check.

Variation in clock period. Not clock skew.

 

[ads-ee]

Hold checks are done with the same clock edge for a given clock domain. Skew between source and destination clocks will definitely affect hold time calculations as the source and destination clocks, for the same edge, will arrive at slightly different times. Clock period jitter won't affect this arrival time at all. It instead affects the arrival of the next clock edge (setup edge).

I'd normally draw some timing diagrams to illustrate, but don't have the time.