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A hardware description language looks much like a programming language such as C or ALGOL; it is a textual description consisting of expressions, statements and control structures. One important difference between most programming languages and HDLs is that HDLs explicitly include the notion of time.
VHDL source for a signed adder. VHDL (VHSIC Hardware Description Language) is a hardware description language that can model the behavior and structure of digital systems at multiple levels of abstraction, ranging from the system level down to that of logic gates, for design entry, documentation, and verification purposes.
Verilog, standardized as IEEE 1364, is a hardware description language (HDL) used to model electronic systems.It is most commonly used in the design and verification of digital circuits, with the highest level of abstraction being at the register-transfer level.
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Register-transfer-level abstraction is used in hardware description languages (HDLs) like Verilog and VHDL to create high-level representations of a circuit, from which lower-level representations and ultimately actual wiring can be derived. Design at the RTL level is typical practice in modern digital design.
The hardware is usually done in field-programmable gate arrays (FPGAs) or application-specific integrated circuits (ASICs), whereas the software part is translated into low-level programming language. This approach mostly applies in embedded systems which is defined as a collection of programmable parts that interact continuously with ...
SystemC version 1 included common hardware-description language features such as structural hierarchy and connectivity, clock-cycle accuracy, delta cycles, four-valued logic (0, 1, X, Z), and bus-resolution functions. SystemC version 2 onward focused on communication abstraction, transaction-level modeling, and virtual-platform modeling. It ...
Hardware description language – used to model integrated circuits; Page description language – describes the appearance of a printed page in a higher level than an actual output bitmap; Simulation language – a language used to describe simulations; Specification language – a language used to describe what a system should do