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Contents

Basics

Introduction to HDLs Verilog Module Structure Data Types and Logic Values Vectors and Arrays Lexical Conventions Verilog Operators Port Connection Rules

Behavioral Modeling

Procedural Blocks Blocking vs Non-Blocking Control Statements Loops in Verilog FSM Behavioral Modeling Timing Controls Block Statements Task and Function

Dataflow Modeling

Continuous Assignment Delays in Dataflow Conditional Operator Modeling Combinational Logic

Structural Modeling

Gate Level Modeling gate delays Module Instantiation Switch Level Modeling User Defined Primitives Generate Blocks

Sequential Circuits

Modeling Flip-Flops Modeling Latches Modeling Counters Modeling Shift Registers Synchronous Memories

Combinational Circuits

Modeling Multiplexers Modeling Decoders/Encoders Modeling ALUs Modeling Adders Modeling Comparators

Verification

Testbench Basics System Tasks Simulation Time Randomization Assertions Verification Plan

Other Topics

FPGA vs ASIC Synthesis Concepts Verilog 2001 Features PLI Basics

Other Subjects

Analog Electronics Digital Electronics Signals & Systems Control Systems Electromagnetic Theory Digital Communication Analog Communication Network Analysis Microprocessors VLSI Design Power Electronics Embedded Systems DSP Electronic Devices

Section Progress43%

3 of 7 articles

Data Types and Logic Values

Net (wire), Register (reg), 4-value logic (0,1,x,z).

Updated: 19 March 2026

9 min read

Verilog Data Types

Test your knowledge on this topic.

Question 1 of 3

Q1.What is the default initialization value of a declared reg variable in Verilog simulation?

Related Articles

Modeling Combinational Logic

Boolean equations using dataflow.

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FPGA vs ASIC

Programmable logic vs fixed custom silicon.

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Verilog Operators

Arithmetic, logical, bitwise, reduction, shift, concatenation.

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Introduction to HDLs

Verilog vs VHDL, simulation vs synthesis.

12 min read

Port Connection Rules

Input, Output, Inout, reg/wire connection rules.

6 min read

Verilog Module Structure

Vectors and Arrays