Common syntax structure of VHDL

A VHDL program code includes entity, architecture, configuration, package, library, etc. 1、 Data type 1. User defined data type Use the keyword type, for example: TYPE my_ integer IS RANGE -32 TO 32; – a subset of user-defined integer types TYPE student_ grade IS RANGE 0 TO 100; – a subset of user-defined natural number […]

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VHDL circuit design optimization problem solution

In recent years, with the continuous development of integrated circuit technology and EDA technology, VHDL language, which integrates design, simulation, synthesis and test functions, has been used as IEEE standard hardware description language. Because it is similar to modern high-level assembly language in grammar and style, it has good readability, strong description ability, flexible design […]

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Verification test of IP core in IC Design

introduction Code purification refers to the rule checking of user-defined, IEEE standard, design reuse, comprehensiveness and testability during and after code design; Code coverage analysis. Study whether the test vector is enough in the simulation; Design performance and area analysis. In the process of design logic synthesis, the performance and area requirements of the designed […]

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Realization of serial adder based on VHDL

1. Introduction With the development of technology, the speed of electronic products is changing with each passing day. The application of edai ‘reflective design automatic) technology is well adapted to this feature. Through the design and programming, the digital circuit composed of CPLD / fpgan – replaces the conventional combinational and sequential logic circuits, and […]

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The following rules of identifier in VHDL

The identifier in VHDL can be the name of a constant, variable, signal, port, subroutine or parameter. The following rules should be followed when using identifiers: ·The identifier consists of letters (a Z;a… z) , numbers and underscores. ·Any identifier must start with an English letter. ·The last character cannot be an underline. ·Two consecutive […]

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VHDL implementation of an all digital PLL function module

With the continuous progress of integrated circuit technology, digital application is gradually popularized, and digital phase-locked loop is more and more used in digital communication, power system automation and so on. The advantage of this method is that it can avoid the tedious of simulator, and it has the advantages of low cost, easy implementation […]

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Color lamp control circuit based on VHDL on MAX + plus Ⅱ platform

With the rapid development of science and technology, in modern life, as a kind of landscape, colored lights are installed in the appropriate place of the building, one is to add festival atmosphere as decoration, the other is to play a role of advertising and publicity; it is used on the stage to enhance the […]

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Realization of multi channel color lamp controller based on VHDL

1、 Design principle of multi-channel color lamp controller Design a color lamp control program. It can realize four kinds of pattern cycle change, and has reset switch. The whole system has three input signals CLK, RST, selmode, eight output signals to control eight color lights. The clock signal CLK pulse is generated by the crystal […]

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