VHDL is an international standard regulated by IEEE used to describe digital circuits and automation of electronic design. VHDL is an acronym produced from a combination of two abbreviations VHSIC and HDL.
VHDL is the VHSIC Hardware Description Language. VHSIC stands for Very High-Speed Integrated Circuit. It can describe the behavior and structure of electronic systems but is particularly suitable as a language to describe the structure and behavior of traditional digital circuits as well as traditional electronic circuits such as ASICs and FPGAs. Although its syntax and usage are very similar, it is not a programming language. In response to the codes written in VHDL, it is necessary to create a logic circuit and physical circuit that will do the work on the FPGA.
Before VHDL came along, schematic tracking tools were required to design an electronic circuit. In 1983, the US Department of Defense proposed a competition to find out how the equipment of ASICs acquired by third-party suppliers works. VHDL emerged as a result of this competition and its first use was to monitor ASIC on microelectronic devices.
VHDL can be used to model a digital system at many abstraction levels, from the Algorithmic level to the gate level. The complexity of the digital system being modeled may differ from that of a complete digital electronic system. You can use the Xilinx ISE simulation for VHDL programming.
Xilinx ISE is a software tool produced by Xilinx for the synthesis and analysis of HDL designs, allowing the developer to design, compile, and analyze timing.
Features of VHDL?
-The language is public, human-readable, machine-readable. -The language supports flexible design methods: top-down, bottom-up, or mixed. -The language contains elements that facilitate large-scale design modelings such as components, functions, procedures, and packages, and can also be used as a communication medium between different CAD and CAE tools. -The codes written can be verified by simulation. -Supports both synchronous and asynchronous timing models. -A common language can be used to describe the different library components. -There is no limitation in the design size of the language.