PPT Slide
Timing methodologies (cont'd)
Definition of terms
- clock: periodic event, causes state of memory element to change can be rising edge or falling edge or high level or low level
- setup time: minimum time before the clocking event by which the input must be stable (Tsu)
- hold time: minimum time after the clocking event until which the input must remain stable (Th)
there is a timing "window" around the clocking event during which the input must remain stable and unchanged in order to be recognized