In a Moore machine, output depends only on the present state and not dependent on the input (x). I hope that this can help to you to understand better. There are two basic types: overlap and non-overlap. A sequence detector accepts as input a string of bits: either 0 or 1. A sequence detector is a sequential state machine. Converting the state diagram into a state table: (Overlapping detection) S0 S1 S2 S3 S4 0/0 State Diagrams Sequence detector: detect sequences of 0010 or 0001 Overlapping patterns are allowed Mealy Design Example output: Go to the Top. Generalised 8-bit sequence detector is used to detect any sequence among 256 sequences of 8 bit. Thanks for A2A! In Moore u need to declare the outputs there itself in the state. In this system we have 8bit registers to store the sequence from external 8 input ports at reset 1. Moore state require to four states st0,st1,st2,st3 to detect the 101 sequence. Hence in the diagram, the output is written outside the states, along with inputs. Let’s construct the sequence detector for the sequence 101 using both mealy state machine and moore state machine. State diagrams for sequence detectors can be done easily if you do by considering expectations. Example: Sequential system that detects a sequence of 1111: STEP 1:state diagram – Mealy circuit The next state depends on the input and the present state. A sequence detector is a sequential state machine. Its output goes to 1 when a target sequence has been detected. The FSM that I'm trying to implement is as shown below :- Verilog Module :- `timescale 1ns / 1ps module Moore based sequence detector. Thanks in advance for your help. I will give u the step by step explanation of the state diagram. Non overlapping detection: Overlapping detection: STEP 2:State table. 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. Mealy state machine require only three states st0,st1,st2 to detect the 101 sequence. The state diagram of a Mealy machine for a 1010 detector is: It is supposed to be like this but with 8 bit sequences instead of 4 bit. A logical 1 output will be generated when either one of two 8-bit code sequences are correctly detected sequentially. The codes are 00110001 and 01110011. In a Mealy machine, output depends on the present state and the external input (x). Sequence detector with overlapping. I'm designing a "1011" overlapping sequence detector,using Mealy Model in Verilog. Overlapping patterns are allowed. In a sequence detector that allows overlap, the final bits of one sequence can be the start of another sequence. System will detect the overlapping sequences for registered sequence. 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