ESE 382 Lecture Notes - Lecture 5: Vhdl, Exclusive Or, Infinite Loop
24 May 2020
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Document Summary
A behavioral style architecture uses algorithms in the form of sequential programs to describe a system. A behavioral description does not directly provide details on how a system is to be implemented. It simply tells how the system is to behave functionally. A purely behavioral style architecture consists of one or more process statements. Each process statement is, in its entirety, a concurrent statement. Since they are concurrent statements, processes can execute in parallel. Processes communicate with each other using signals, similar to the way components in a structural description use signals to communicate with each other. This half adder consists of two processes, labeled p1 and p2. Following keyword process is a sensitivity list (in parentheses). Process p1 has two signals, a and b, in its sensitivity list. This process executes whenever there is an event on either of these signals. Thus, this process is sensitive to a and b. Process p1 contains a single signal assignment statement:
