This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages)
This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "VHDL" – news · newspapers · books · scholar · JSTOR(February 2017) (Learn how and when to remove this message)
This article's lead section may be too short to adequately summarize the key points. Please consider expanding the lead to provide an accessible overview of all important aspects of the article.(December 2020)
(Learn how and when to remove this message)
VHDL
Paradigm
concurrent, reactive, dataflow
First appeared
1980s
Stable release
IEEE 1076-2019
/ 23 December 2019; 4 years ago (2019-12-23)
Typing discipline
strong
Filename extensions
.vhd
Website
IEEE VASG
Dialects
VHDL-AMS
Influenced by
Ada,[1] Pascal
Programmable Logic/VHDL at Wikibooks
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. The language was developed for the US military VHSIC program in the 1980s, and has been standardized by the Institute of Electrical and Electronics Engineers (IEEE) as IEEE Std 1076; the latest version of which is IEEE Std 1076-2019. To model analog and mixed-signal systems, an IEEE-standardized HDL based on VHDL called VHDL-AMS (officially IEEE 1076.1) has been developed.
^David R. Coelho (30 June 1989). The VHDL Handbook. Springer Science & Business Media. ISBN 978-0-7923-9031-2.
VHDL (VHSIC Hardware Description Language) is a hardware description language that can model the behavior and structure of digital systems at multiple...
The IEEE 1164 standard (Multivalue Logic System for VHDL Model Interoperability) is a technical standard published by the IEEE in 1993. It describes the...
- limited experimental support for Verilog and VHDL. Electronics portal List of HDL simulators for VHDL, Verilog, SystemVerilog, ... Espresso heuristic...
expressions written in one of the hardware description languages, such as VHDL, Verilog, SystemVerilog. This page is intended to list current and historical...
languages: VHDL and Verilog. There are different types of description in them: "dataflow, behavioral and structural". Example of dataflow of VHDL: LIBRARY...
Mentor Graphics,) for simulation of hardware description languages such as VHDL, Verilog and SystemC, and includes a built-in C debugger. ModelSim can be...
other form will be automatically defined in terms of the provided one. The VHDL arithmetic left shift operator is unusual. Instead of filling the LSB of...
behaviour of the circuit. Pure digital simulations are also supported using VHDL and/or Verilog. Only a small set of digital devices like flip flops and logic...
In VHDL simulations, all assignments to signals (a VHDL concept that represents a net connecting different components together) occur with some infinitesimal...
of the words "verification" and "logic". With the increasing success of VHDL at the time, Cadence decided to make the language available for open standardization...
simulator (for design languages such as VHDL or Verilog.) To simulate an e-testbench with a design written in VHDL/Verilog, Specman must be run in conjunction...
uses Z'ABCD'. Ada and VHDL enclose hexadecimal numerals in based "numeric quotes": 16#5A3#, 16#C1F27ED#. For bit vector constants VHDL uses the notation x"5A3"...
Probably the best known digital simulators are those based on Verilog and VHDL. Some electronics simulators integrate a schematic editor, a simulation engine...
numeric_std is a library package defined for VHDL. It provides arithmetic functions for vectors. Overrides of std_logic_vector are defined for signed and...
from a description written in VHDL, Verilog or some other hardware description language. For example, the following VHDL code describes a very simple 8-bit...
general improvements and bug fixes, added preliminary support for VHDL, but the VHDL support has been abandoned as of 2018. Not even the author quite remembers...
merger of Open Verilog International (OVI) and VHDL International, the developers of Verilog and VHDL respectively. Both were originally formed nine years...
emulation on a memory card, including support for booting MSX-DOS. Due to its VHDL programmable hardware, it's possible to give the device new hardware extensions...
DMV. In 1981, the U.S. Department of Defense additionally began funding of VHDL as a hardware description language. Within a few years, there were many companies...