10. Structural Modeling

Structural modeling was described briefly in the section Structural Modeling in “Basic Structure of a VHDL file”. A structural way of modeling describes a circuit...

8. Behavioral Modeling: Sequential Statements

  As discussed earlier, VHDL provides means to represent digital circuits at different levels of representation of abstraction, such as the behavioral and structural modeling....

7. Operators

VHDL supports different classes of operators that operate on signals, variables and constants. The different classes of operators are summarized below.   Class    ...

6. Data types

Each data object has a type associated with it. The type defines the set of values that the object can have and the set of...

4. Lexical Elements of VHDL

Identifiers Identifiers are user-defined words used to name objects in VHDL models. We have seen examples of identifiers for input and output signals as well...

3. Basic Structure of a VHDL file

A digital system in VHDL consists of a design entity that can contain other entities that are then considered components of the top-level entity. Each...

1. Introduction VHDL

VHDL stands for VHSIC (Very High Speed Integrated Circuits) Hardware Description Language. In the mid-1980’s the U.S. Department of Defense and the IEEE sponsored the...
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