Sometimes one could be interested in an interval rather than an instant of the clock cycle. The combination of the primary clock and the delayed clock can once again come in handy by offering combinations of when the different clocks are rising and falling. Three of these operations are found in the upper left hand corner. It also contains the carries so that several of these circuits can be wired together to do full-word operations. This type of circuit is called a bit slice.
Many designers use clocks to provide synchronization of events.
A clock is a circuit that emits a series of pulses with a determined width and interval. The clock cycle time is the time interval between two edges of a pulse. For purposes of precision, a crystal oscillator often controls clock frequency. Many events can occur within one clock cycle. For this reason, a single clock cycle must be broken down into subcycles.