Difference Between Verilog and VHDL

Verilog is a hardware description language. It is used to define electronic circuits and systems like microprocessors and flip-flops. It is based on the C language hence it is easier to learn for the people knowing C.

VHDL is a short form for Very High-Speed Integrated Circuit Hardware Description Language. It is used to describe hardware and many more like integrated circuits. It is an older language and it is based on Ada and Pascal languages.

Comparison Table Between Verilog and VHDL

Parameters of ComparisonVerilogVHDL
Definition Verilog is a hardware description language used for modelling electronic systems.VHDL is a hardware description language used to describe digital and mixed-signal systems.
Introduced Verilog is a newer language as it was introduced in 1984.VHDL is an older language as it was introduced in 1980.
Language It is based on the C language.It is based on Ada and Pascal languages.
Difficulty Verilog is easier to learn.VHDL is comparatively harder to learn.
AlphabetsVerilog is Case sensitive.VHDL is case insensitive.

What is Verilog?

Verilog is a hardware description language introduced in 1984. It is similar to the C language. It is used to model electronic circuits and systems. It is using many data types that are predefined.

It is used for verification by the method of simulation for different tasks like fault grading, testability analysis, timing analysis, and logic synthesis. All these electronic systems work is done by writing this language in textual format.

It is a weakly typed language. It is a case-sensitive language which means it will treat "bat" and "BAT" as two different words.

It developed with time since 1995, now it is merged with the system Verilog. With constant up-gradation, it gets many features but still, it lacks library management.

What is VHDL?

VHDL is also a hardware description language which is also known as Very High-Speed Integrated Circuit Hardware Description Language. It is used to model the working of digital systems.

It is based on Ada and Pascal languages and it also has some extra features that these languages lack. It functions in two modes, the first one is Statement execution in which it evaluates the triggered statements.

It is a case insensitive language that means it treat upper case alphabets and lower case alphabets as the same data and Its projects are portable and multipurpose in many ways.

As it is based on Ada and Pascal languages it is more difficult to learn because these languages are not that much popular among programmers.

Main Differences Between Verilog and VHDL

  1. As Verilog is based on a popular C language hence it is easier to learn but VHDL is difficult to learn as it is based on non-conventional languages.
  2. Verilog is used to model electronic systems and circuits like microprocessors and flip-flops whereas VHDL is used to describe digital and mixed signals like integrated circuits.

Conclusion

Hardware description languages are needed for this generation as most of the things around us are dependent on electronic systems and circuits. These languages made tasks easier and effective.

Many same tasks can be performed using both languages but Verilog is a compact language hence needed fewer lines of code for completion of tasks whereas VHDL will require more long codes.

References

  1. https://ieeexplore.ieee.org/abstract/document/545676/
  2. https://trilobyte.com/pdf/golson_clark_snug16.pdf
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