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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.
When designing digital integrated circuits with a hardware description language (HDL), the designs are usually engineered at a higher level of abstraction than transistor level (logic families) or logic gate level. In HDLs the designer declares the registers (which roughly correspond to variables in computer programming languages), and ...
The languages used as source code for logic compilers are called hardware description languages, or HDLs. [1] PALASM, ABEL and CUPL are frequently used for low-complexity devices, while Verilog and VHDL are popular higher-level description languages for more complex devices. The more limited ABEL is often used for historical reasons, but for ...
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Architecture description language – used as a language (or a conceptual model) to describe and represent system architectures; 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
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 ...