Suppose that we have a synchronous 4bit counter A that counts from 0 to 9 synchronized with a clock signal CP. We put an AND gate such that the signal Y = Q3*Q0 is 1 when we count a decade. The signal Y is now driven to both another counter B that counts decades and the RESET pin of counter A.
My question is the following:
Which option is better, namely a synchronous or an asynchronous counter, to use for counter B in order to count these periodic phenomena (a decade occurs always after 10 pulses)?