![]()  | Entity Statements-- Notes Page -- |   
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An entity can contain passive statements to perform actions such
as timing or validity checks at the interface of a component.
Assertion statements in an entity, for example, may be used to check
that setup and hold requirements are satisfied.
A passive statement is one which does not change the state of the
behavior.  Simply put, the execution of a passive statement does not
lead to any signal assignments.