Chapter 4. Composite Data Types and Operations

Now that we have seen the basic data types and sequential operations from which the behavioral part of a VHDL model is formed, it is time to look at composite data types. We first mentioned them in the classification of data types in Chapter 2. Composite data objects consist of related collections of data elements in the form of either an array or a record. We can treat an object of a composite type as a single object or manipulate its constituent elements individually. In this chapter, we see how to define composite types and how to manipulate them using operators and sequential statements.


An array consists of a collection of values, all of which are of the same type as each other. The position ...

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