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Architectures
The architecture contains the actual
specification of how a design behaves. The entity specifies the
interface and may have many different models of behavior, so there may
be more then one architecture for a given entity. The architecture
declaration is as follows:
If the name appears after the END
keyword then it must be the same as the name of the architecture. The name
following the OF is the name of the entity that defines an interface
for the design. An architecture can contain many different object
declarations and statements that are described throughout this and the
next chapter.
Each combination of an architecture and its entity constitutes a
design. Every entity must have at least one corresponding architecture.