Moore machine

A Moore machine can be regarded as a restricted type of finite state transducer.

Because of this characteristic, statecharts behave like Moore machines.

Simple Moore machine have one input and one output:

(This is in contrast to a Moore machine, whose output values are determined solely by its current state.)

Clocked sequential systems are a restricted form of Moore machine where the state changes only when the global clock signal changes.

More complex Moore machines can have multiple inputs as well as multiple outputs.

Concurrency can also be modelled using finite state machines like Mealy and Moore machines.

A typical electronic Moore machine includes a combinational logic chain to decode the current state into the outputs (lambda).

UML state machines have the characteristics of both Mealy machines and Moore machines.

The state diagram for a Moore machine or Moore diagram is a diagram that associates an output value with each state.

The number of states in a Moore machine will be greater than or equal to the number of states in the corresponding Mealy machine.

Nine theorems are proved about the structure of S, and experiments with S. Later, S machines became known as Moore machines.

The Moore machine is named after Edward F. Moore, who presented the concept in a 1956 paper, "Gedanken-experiments on Sequential Machines."

The outputs then stay the same indefinitely (LEDs stay bright, power stays connected to the motors, solenoids stay energized, etc.), until the Moore machine changes state again.

With this definition, a Kripke structure may be identified with a Moore machine with a singleton input alphabet, and with the output function being its labeling function.

Mealy and Moore machines are in use as design tools in digital electronics systems, which we encounter in the form of hardware used in telecommunications or electronic devices in general.

The difference between Moore machines and Mealy machines is that in the latter, the output of a transition is determined by the combination of current state and current input.

DEVS can be seen as an extension of the Moore machine formalism, which is a finite state automaton where the outputs are determined by the current state alone (and do not depend directly on the input).

They support actions that depend on both the state of the system and the triggering event, as in Mealy machines, as well as entry and exit actions, which are associated with states rather than transitions, as in Moore machines.

Every Moore machine M is equivalent to the Mealy machine with the same states and transitions and the output function that takes each state-input pair (q,x) to G(q), where G is M's output function.

Since the lifespan of each state is a real number (more precisely, non-negative real) or infinity, it is distinguished from discrete time systems, sequential machines, and Moore machines, in which time is determined by a tick time multiplied by non-negative integers.