Gourt > Science > Technology > Electronics > Design > Hardware Description Languages (6)
In electronics, a hardware description language or HDL is any language from a class of computer languages for formal description of electronic circuits. It can describe the circuit's *, its design, and tests to verify its operation by means of simulation.
An HDL is a standard text-based expression of the temporal behaviour and/or (spatial) circuit structure of an electronic system. In contrast to a software programming language, an HDL's syntax and semantics include explicit notations for expressing time and concurrency which are the primary attributes of hardware. Languages whose only characteristic is to express circuit connectivity between a hierarchy of blocks are properly classified as netlist languages.
HDLs are used to write executable specifications of some piece of hardware. A simulation program, designed to implement the underlying semantics of the language statements, coupled with simulating the progress of time, provides the hardware designer with the ability to model a piece of hardware before it is created physically. It is this executability that gives the illusion of HDLs being a programming language. Simulators capabable of supporting discrete event (digital), and continuous time (analog) modeling exist and HDL's targeted for each are available.
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ABEL Primer - Overview of the ABEL Hardware Description Language.
Meta Description: [ Overview of ABEL Hardware Description Language ]
Digital Core Design - VHDL, Verilog synthesizable and simulation models.
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Meta Description: [ Free hints tips and models for hardware engineers ]
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HDL at Wikipedia - Definitions, resources, and links related to hardware description languages.
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