VHDL: Programming by Example

CHAPTER 3

Sequential Processing

In Chapter 2, we examined behavioral modeling using concurrent statements. We discussed concurrent signal assignment statements, as well as block statements and component instantiation. In this chapter, we focus on sequential statements. Sequential statements are statements that execute serially one after the other. Most programming languages, such as C and C++, support this type of behavior. In fact, VHDL has borrowed the syntax for its sequential statements from ADA.

Process Statement

In an architecture for an entity, all statements are concurrent. So where do sequential statements exist in VHDL? There is a ...