Q1CMOS Design
Question
2 marks
Q.1. Define Entity.
Answer
An entity in VHDL is the basic design unit that defines the external interface (input/output ports and generic parameters) of a digital circuit, without describing its internal implementation.
An entity is the fundamental design unit in VHDL that describes the external interface of a digital circuit or system, specifying its input and output ports (with their names, modes - in, out, or inout - and data types) and any generic parameters (compile-time constants such as bit-width or delay values), without specifying anything about the internal behavior or structure used to implement that interface; the actual internal implementation is separately described in one or more associated architecture bodies bound to the entity.