A sequence controller for designating an operating state to be performed currently, includes a set of terminals from which first data for designating a current operating state is derived, a state designation circuit producing second data for designating a next operating state in response to said first data, a latch circuit coupled between the state designation circuit and the set of terminals for latching and outputting the second data instead of the first data in response to a strobe signal, and a signal generator supplied with a clock signal for producing the strobe signal in synchronism with the clock signal when a response signal to the current operating state is returned to the controller.
