Finite state machines: counter

Other possible counter variations

Decrement

Input 0: hold

Input 1: decrement

Increment/decrement

Input 0: increment

Input 1: decrement

Additional inputs

Asynchronous clear: reset value immediately to 00

Enable/disable

When this input is 0, counter continues to output current value

When 1, perform normal operations

Additional output

Counter out

Normally 1, but 0 when maximum value is reached

What could this be used for?

(Think of a connection with enable)