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The Vhdl Reference A Practical Guide To Computer A

What is VHDL in computer?
The Very High Speed Integrated Circuit (VHSIC) Hardware Description Language (VHDL) is a language that describes the behavior of electronic circuits, most commonly digital circuits.
VHDL is defined by IEEE standards.
There are two common variants: VHDL-1987 and VHDL-1993.
How to write VHDL code?
VHDL uses the following three types of objects:
1Constants.
Constant is an object which can only hold a single value that cannot be changed during the whole code.
Example: constant number_of_bytes integer:=8;2Variables.
A variable also holds a single value of a given type.
3) Signals.
Why do we need VHDL?
The key advantage of VHDL, when used for systems design, is that it allows the behavior of the required system to be described (modeled) and verified (simulated) before synthesis tools translate the design into real hardware (gates and wires).
Another benefit is that VHDL allows the description of a concurrent system.
The Entity is the VHDL basic building block
All the VHDL designs are created with one or more entity.
The entities allow you creating a hierarchy in the design.
The entity syntax is keyword “entity”, followed by entity name and the keyword “is” and “port”.
Then inside parenthesis there is the ports declaration.

What is VHDL in computer?