VHDL

Very High Speed Integrated Circuit (VHSIC) HardwareDescription Language. A large high-level VLSI designlanguage with Ada-like syntax. The DoD standard for hardwaredescription, now standardised as IEEE 1076.

["VHSIC Hardware Description Language", M.R. Shahdad et al,IEEE Computer 18(2):94-103 (Feb 1985)].

VHDL

(VHSIC Hardware Description Language) A hardware description language (HDL) used to design electronic systems at the component, board and system level. VHDL allows models to be developed at a very high level of abstraction. Initially conceived as a documentation language only, most of the language can today be used for simulation and logic synthesis. VHDL became the IEEE 1076 standard in 1987, but was initially developed for the U.S. military's VHSIC program in 1981. See Verilog and RTL.

HDL Languages

VHDL and Verilog are the most popular HDLs. These examples show a circuit described in RTL in both languages and the resulting schematic of the gate level netlist created after synthesis (below). (Language and schematic examples from "HDL Chip Design" courtesy of Douglas J. Smith.)

VHDL

Acronym	Definition
VHDL➣VHSIC (Very High Speed Integrated Circuit) Hardware Description Language
VHDL➣VHSIC (Very High-Speed Integrated Circuit) Hardware Design Language
VHDL➣Vhsic Hardware Description Language
VHDL➣Vhsic High Level Design Language
VHDL➣Very High Density Logic
VHDL➣VSHIC (Very High Speed Integrated Circuit) Hardware Description Language
VHDL➣Very High-level Design Language
VHDL➣Virtual Hardware Description Language
VHDL➣Very High Density Lipoprotein