But the problem with 4-bit binary counters is that they count from 0000 to 1111. Then a flip-flop counter has two possible output states and by adding more flip-flop stages, we can make a divide-by-2 N counter. If we connect together several toggle flip-flops in a series chain we can produce a digital BCD counter which stores or display the number of times a particular count sequence has occurred.Ĭlocked T-type flip-flops act as a binary divide-by-two counter and in asynchronous counters, the output of one counting stage provides the clock pulse for the next stage. We saw previously that toggle T-type flip flops can be used as individual divide-by-two counters.
