Finite State Machines (FSMs) Definition

When we work on any sequential function in a system, finite state machines (FSMs) become essential components. They are indispensable in designing digital systems. To implement FSMs, we need to encode and store the different states of the system.

Types of FSMs

There are two main types of FSMs: Mealy state machines and Moore state machines. In a Mealy machine, the system’s output depends on both the current state of the machine and the external inputs. On the other hand, in a Moore FSM, the system’s output depends solely on the current state of the machine. You’ll find that Mealy machines are more common in System on Chip (SOC) designs.

Understanding Moore FSMs

Figure 1 shows a Moore FSM. These diagrams illustrate the different states and transitions of the state machine and how the outputs are determined based on the type of FSM. By understanding these diagrams, you can see how FSMs play an important role in the functioning and control of various digital systems. They are widely used in digital system design, making them crucial for our work in this field.