How is a sequence detector in a Moore machine?

How is a sequence detector in a Moore machine?

A sequence detector is a sequential state machine. In a Moore machine, output depends only on the present state and not dependent on the input (x). Hence in the diagram, the output is written with the states. The state diagram of a moore machine for a 101 detector is: The state table for the above diagram: Four states will require two flip flops.

What is Verilog code for Moore FSM sequence detector?

This Verilog project is to present a full Verilog code for Sequence Detector using Moore FSM. A Verilog Testbench for the Moore FSM sequence detector is also provided for simulation. The Moore FSM keeps detecting a binary sequence from a digital input and the output of the FSM goes high only when a “1011” sequence is detected.

How does a sequence detector work in a Mealy machine?

A sequence detector is a sequential state machine that takes an input string of bits and generates an output 1 whenever the target sequence has been detected. In a Mealy machine, output depends on the present state and the external input (x). Hence, in the diagram, the output is written outside the states, along with inputs.

How many bits of state does the Moore machine need?

Tables 3.11 and 3.12 show the state transition and output tables for the Moore machine. The Moore machine requires at least two bits of state. Consider using a binary state encoding: S0 = 00, S1 = 01, and S2 = 10.

How are state machines modeled in mealy and Moore?

The state machines are modeled using two basic types of sequential networks- Mealy and Moore. In a Mealy machine, the output depends on both the present (current) state and the present (current) inputs. In Moore machine, the output depends only on the present state.

How is the output of a 101 Detector written?

Hence in the diagram, the output is written with the states. The state diagram of a moore machine for a 101 detector is: The state table for the above diagram: Four states will require two flip flops. Consider two D flip flops. Their excitation table is shown below.

How to design and implement a sequence detector to detect 1010?

Hi, this post is about how to design and implement a sequence detector to detect 1010. This is the fifth post of the series. The previous posts can be found here: sequence 1011, sequence 1001, sequence 101, and sequence 110. I am going to cover both the Moore machine and Mealy machine in overlapping and non-overlapping cases.

How to design a 101 mealy sequence detector?

The steps to design a non-overlapping 101 Mealy sequence detectors are: Rule 1 : States having the same next states for a given input condition should have adjacent assignments. Rule 2: States that are the next states to a single state must be given adjacent assignments. Rule 1 given preference over Rule 2.

Is the Moore machine the same as the Mealy machine?

I am going to cover both the Moore machine and Mealy machine in overlapping and non-overlapping cases. That’s all for sequence detectors 1010. Let me know if you have any questions or any thoughts.