In this article, entity and architecture declaration in VHDL are discussed with examples. Let us first learn about some lexical elements used in VHDL. Lexical Elements The lexical elements are the basic units in a VHDL program. comments, identifiers, reserved words, number, characters and strings. Comments The comments are for documentation purpose only. It does […]
All the objects in VHDL can be declared using type specification. A wide range of data types in VHDL are available. A type declaration statement is TYPE type_name is type_mark; Two main data types in VHDL are Scalar Data Types Composite Data Types Scalar Data Types in VHDL The scalar data types describe objects that
In this article, working of operators in VHDL are discussed in detail. The main purpose of any code is to implement some kind of logic. Operators help us to build that logic. The predefined operators in the language are classified into the following five categories: Logical operators Relational operators Shift operators Adding operators Multiplying operators
The objects are used to represent and store the data in the system being described in VHDL. It holds the values of specific type. The VHDL object consist of following objects. Constant Variable Signal All these Data Objects in VHDL with Examples are explained in the following article. Constant These are the identifiers with fixed
Pros and Cons of VHDL The Pros and Cons of VHDL are as follows. The VHDL can be used as a communication medium between different CAD and CAE tools, between chip vendors and CAD tool users. The language supports hierarchy that is, A digital system can be modelled as a set of interconnected components, each
This VHDL tutorial provides VHDL basics. It is designed for beginners especially students. What is HDL? What is VHDL? What is History of VHDL? are explained in this tutorial. The key focus is on Need and features of VHDL. VHDL Concept Digital circuit was changed from SSI to LSI in the year 1980s. Initially DeMorgan
