Different Classification of Verilog
- Verilog-1995: Verilog-1995, also known as IEEE Standard 1364-1995, is the initial version of Verilog that introduced the language’s basic syntax and features. It provides the fundamental constructs for describing digital circuits, including modules, ports, data types (wire, reg), and basic behavioral and structural modeling techniques.
- Verilog-2001: Verilog-2001, an extension of Verilog-1995, introduced several new features and enhancements to the language to improve code readability, re-usability, and ease of design. It addressed some limitations of the previous version and introduced new constructs for better modeling and verification.
- SystemVerilog: SystemVerilog is a significant extension of Verilog that adds new features and capabilities for both design and verification. It incorporates features from the Vera and Specman languages, providing a comprehensive solution for design, verification, and system-level modeling.
- Verilog-AMS (Analog and Mixed-Signal): Verilog-AMS is an extension of Verilog that enables modeling of analog and mixed-signal systems alongside digital logic. It provides constructs for describing continuous-time analog behavior, such as voltage and current, in addition to digital signals and logic.
Getting Started with Verilog
For a long time, computer programming languages like FORTRAN, Pascal, and C were used to describe computer programs and their code execution is sequential. But there isn’t any language to describe the digital circuits. This is when Hardware Description Language(HDL) came into play. HDLs are even popular for verification purposes. There are mainly two types of HDL:
- Verilog HDL
- VHDL (Very High-Speed was Integrated Circuit (VHSIC) Hardware Description Language)
Note: Verilog HDL and VHDL aren’t the same. VHDL was used before Verilog came into existence. the difference between them will be discussed in the later part.
Table of Content
- What is Verilog?
- Gate Level Modeling
- Data-Flow Modeling
- Behavioral Modeling
- Operators
- Identifiers and Keywords
- Datatypes
- Module Declaration
- Classification of Verilog
- Verilog HDL Vs VHDL