Cascading; When two timers are used, and the entire function of the first timer is to initiate a timing cycle in the second timer. it is called a cascading timer circuit.

Actually, anytime the output of one function is use as the input of another function, it is referred to as a cascade. Timers, counters and even PIDs are cascaded.

Almost all traffic light programs contain a timer cascade that controls when the light turns green, when the light turns yellow and when the light turns red.