What is VHDL?
VHDL is a Hardware Definition Language (HDL) which is in use since 80âs and standardized by IEEE.
VHDLÂ stands for VHSIC Hardware Definition Language where VHSIC stands for Very High Speed Integrated Circuit.
VHDL can be used for two purposes:
Below you can find a simple VHDL code which defines an AND gate with two inputs.
entity AND_GATE is
Port ( A : in STD_LOGIC;
B : in STD_LOGIC;
C : out STD_LOGIC);
architecture Behavioral of AND_GATE is
C <= A AND B;
VHDL is similar to software programming languages in terms of style and syntax. But in oppose to those languages VHDL includes many hardware specific constructs.
The following pages will define VHDL in more detail and help you to get familiar with VHDL.
Now letâs a quick and neat look at the VHDL terminology to understand which term means what.
Note: In VHDL Dictionary section of this web site, you can find explanations and simple examples for all the VHDL codes. We believe this section will be very useful as a reference to VHDL designers.