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The System Designer's Guide to VHDL-AMS by Darrell A. Teegarden, Gregory D. Peterson, Peter J. Ashenden

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chapter five

Digital Modeling Constructs

The description of a module in a digital system can be divided into two facets: the external view and the internal view. The external view describes the interface to the module, including the number and types of inputs and outputs. The internal view describes how the module implements its function. In VHDL-AMS, we can separate the description of a module into an entity declaration, which describes the external interface, and one or more architecture bodies, which describe alternative internal implementations. These were introduced in Chapter 1. In this chapter, we discuss the general aspects of entity declarations and architecture bodies that are common to both digital and analog modeling, and then focus ...

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