Re: Can anyone explain why are setup & hold of half cycle ssb are both freq dependent
In full cycle path with the same clock, hold checks for flop to flop path, are not frequency dependent because hold checks are calculated at the same clock edge for the launching and capturing flop. Whereas, in half cycle path with the same clock, hold checks for flop to flop path are checked from either rising edge to falling edge (or falling edge to rising edge ). Based on the frequency of the clock ( assuming 50% duty cycle) , if frequency changes, hold check timing will change.