• 4-bit Binary Counter = 2^4 = 16 (modulo-16 or MOD-16)
The Modulo number can be increased by adding more flip-flops to the counter and cascading is a method of achieving higher modulus counters. Then the modulo or MOD number can simply be written as: MOD number = 2n
Some of the advantages of Asynchronous Counters:
1 Asynchronous Counters can easily be made from Toggle or D-type flip-flops.
2 They are called “Asynchronous Counters” because the clock input of the flip-flops are not all driven by the same clock signal.
3 Each output in the chain depends on a change in state from the previous flip-flops $output.
4 Asynchronous counters are sometimes called ripple counters because the data appears to “ripple” from the output of one flip-flop to the input of the next.
5 They can be implemented using “divide-by-n” counter circuits.
6 Truncated counters can produce any modulus number count.
