Introduction - If you have any usage issues, please Google them yourself
VHDL is used primarily to describe the structure, behavior, function, and interface of digital systems. In addition to many sentences with hardware features, VHDL s language form, description style, and syntax are very similar to general computer high-level languages. The program structure of VHDL is an engineering design, or design entity (can be a component, a circuit module or a system) is divided into external (or visible part, and port) and internal (or not visual)