Verilog Sequence Detector Code: Design and Implementation Quiz

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Verilog Sequence Detector

A Verilog sequence detector is a digital circuit that detects a specific sequence of binary bits in an input stream. It is typically implemented using a finite state machine (FSM). In this article, we will discuss the design of a Verilog sequence detector using FSM and its synthesis.

Finite State Machine (FSM)

A finite state machine (FSM) is a mathematical model consisting of states and transitions between them, where each state represents a condition, and the transition represents a change in the condition. In the context of digital circuits, FSMs are used to model the behavior of systems with a finite number of discrete states.

The design of an FSM for a sequence detector involves defining states and transitions based on the input sequence. The state diagram for the sequence detector shows the possible states and the transitions between them based on the input sequence. The design uses two registers, one to hold the current state and one for the next state.

Verilog Code Syntax

The Verilog code for the Moore FSM sequence detector is designed based on the state diagram and block diagram of the Moore FSM. The code consists of several modules, including registers, inputs, and outputs.

The det_1011 module is the main module that implements the sequence detector using the Moore FSM. It has inputs clk (clock signal), rstn (reset signal), in (input sequence), and out (output of the sequence detector). It also includes several parameters defining the states of the FSM.

The tb module is the testbench for the sequence detector. It has inputs clk, rstn, and in (input sequence) and an output out. It also includes register l_dly and tb_in to control the input stimulus.

The testbench simulates the sequence detector by applying the input sequence to the input in and observing the output out. The simulation waveform shows the behavior of the sequence detector for a specific input sequence.

Conclusion

In this article, we have discussed the design of a Verilog sequence detector using FSM. The design uses the Moore FSM to detect a binary sequence from a digital input, and the output of the FSM goes high only when a specific sequence is detected. The Verilog code is synthesized based on the state diagram and block diagram of the Moore FSM.

Description

Learn about the design of a Verilog sequence detector using finite state machine (FSM) and the synthesis process. Explore the Verilog code syntax for implementing a Moore FSM sequence detector and understand the testbench simulation for verifying the functionality.

Verilog Sequence Detector Design

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Questions and Answers

What is a finite state machine in the context of digital circuits?

What is the main module in the Verilog code for the Moore FSM sequence detector?

What is the purpose of the registers in the design of a finite state machine for a sequence detector?

What is the state diagram used for in the design of a sequence detector?

What is the output of the `det_1011` module in the Verilog code for the Moore FSM sequence detector?

What type of Finite State Machine (FSM) is used in the design of the sequence detector?

What is the purpose of the `tb` module in the sequence detector?

What is the output of the FSM in the sequence detector?

What is the purpose of the `l_dly` and `tb_in` registers in the `tb` module?

What is the simulation waveform used for in the sequence detector?

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