False.
Counters and timers are two different types of digital circuits. While they may share some similarities in their function and application, they operate differently.
Counters are digital circuits that count input events or signals and produce a binary output that represents the count. Counters can be designed to operate on an internal clock or an external clock signal.
Timers, on the other hand, are digital circuits that produce a delay or a pulse of a specific duration in response to an input signal. Timers can be designed to operate on an internal clock or an external clock signal.
Therefore, counters and timers can both operate on an internal clock or an external clock signal, depending on their design and application.