EDA技术及其应用的探究.docx

1、EDA技术及其应用的探究EDA技术及其应用的探究摘要：在简要介绍了EDA技术特点的基础L，用EDA技术作为开发手段，实现一个数字系统的设计。系统采用了顶层图形设计思想，基于硬件描述语言AI扔L，以可编程器件为核心，具有体积小、可靠性高、灵活性强等特点。并比较了EnA技术与传统电子设计方法的差异，总结出别rA技术的优势。Abstract: on the basis of briefly introduces the characteristics of the EDA technology - L, using EDA technology as a means of development,

2、to implement a digital system design. System USES a top graphic design ideas, based on the hardware description language (AI L, programmable device as the core, has small volume, high reliability, strong flexibility, etc. And compare the EnA technology and the traditional design method of electronic

3、 differences, summarizes dont rA technology advantage.关键词：EDA 数字系统 CPLD VHDLKeywords: EDA CPLD VHDL digital system电子设计的必由之路是数字化，这已成为共识。在数字化的道路上，我国的电子技术经历了一系列重大的变革。从应用小规模集成电路构成电路系统，到广泛地应用微控制器或单片机(MCU)，在电子系统设计上发生了具有里程碑意义的飞跃。电子产品正在以前所未有的速度进行着革新，主要表现在大规模可编程逻辑器件的广泛应用。特别在当前，半导体工艺水平已经达到深亚微米，芯片的集成高达到干兆位，时钟频

4、率也在向干兆赫兹以上发展，数据传输位数达到每秒几十亿次，未来集成电路技术的发展趋势将是SOC(System 0h aCh5p)片上系统。从而实现可编程片上系统芯片CPU(复杂可编程逻辑器件)和5PGA(现场可编程门阵列)必将成为今后电子系统设计的一个发展方向。所以电子设计技术发展到今天，又将面临另一次更大意义的突破，5PGA在EDA(电子设计自动化)基础上的广泛应用。Electronic design is the necessary way of digitalization, it has become the consensus. On the way of digitization,

5、electronic technology has experienced a series of major changes in our country. From small-scale integrated circuit application circuit system, to the widely used microcontroller or microcontroller (MCU), in the electronic system design on the landmark leap. Electronic products are at an unprecedent

6、ed rate in the innovation, mainly manifested in the large-scale programmable logic devices are widely used. , especially in the current level has reached deep sub-micron semiconductor process, chip integration high reached one million, to dry MHZ clock frequency is above, development data transfer d

7、igits to billions of times per second, the future trend of the development of integrated circuit technology will be SOC (System 0 h aCh5p) on a chip System. So as to realize the programmable system on a chip, the CPU (the complex programmable logic device) and 5 pga (field programmable gate array) i

8、s bound to become a development direction of the future electronic system design. So until today in development of electronic design technology, will be faced with another more meaningful breakthrough, 5 pga in EDA (electronic design automation) on the basis of a wide range of applications.EDA技术的概念:

9、 EDA是电子设计自动化(E1echonics Des5p AMtoM60n)的缩写。由于它是一门刚刚发展起来的新技术，涉及面广，内容丰富，理解各异，所以目前尚无一个确切的定义。但从EDA技术的几个主要方面的内容来看，可以理解为：EDA技术是以大规模可编程逻辑器件为设计载体，以硬件描述语言为系统逻辑描述的主要表达方式，以计算机、大规模可编程逻辑器件的开发软件及实验开发系统为设计工具，通过有关的开发软件，自动完成用软件的方式设计电子系统到硬件系统的一门新技术。可以实现逻辑编译、逻辑化简、逻辑分割、逻辑综合及优化，逻辑布局布线、逻辑仿真。完成对于特定目标芯片的适配编译、逻辑映射、编程下载等工作，最

10、终形成集成电子系统或专用集成芯片。EDA技术是伴随着计算机、集成电路、电子系统的设计发展起来的，至今已有30多年的历程。大致可以分为三个发展阶段。20世纪70年代的CAD(计算机辅助设计)阶段：这一阶段的主要特征是利用计算机辅助进行电路原理图编辑，PCB布同布线，使得设计师从传统高度重复繁杂的绘图劳动中解脱出来。20世纪80年代的QtE(计算机辅助工程设计)阶段：这一阶段的主要特征是以逻辑摸拟、定时分析、故障仿真、自动布局布线为核心，重点解决电路设计的功能检测等问题，使设计而能在产品制作之前预知产品的功能与性能。20吐纪如年代是EDA(电子设计自动化)阶段：这一阶段的主要特征是以高级描述语言，

11、系统级仿真和综合技术为特点，采用“自顶向下”的设计理念，将设计前期的许多高层次设计由EDA工具来完成。EDA是电子技术设计自动化，也就是能够帮助人们设计电子电路或系统的软件工具。该工具可以在电子产品的各个设计阶段发挥作用，使设计更复杂的电路和系统成为可能。在原理图设计阶段，可以使用EDA中的仿真工具论证设计的正确性；在芯片设计阶段，可以使用EDA中的芯片设计工具设计制作芯片的版图：在电路板设计阶段，可以使用EDA中电路板设计工具设计多层电路板。特别是支持硬件描述语言的EDA工具的出现，使复杂数字系统设计自动化成为可能，只要用硬件描述语言将数字系统的行为描述正确，就可以进行该数字系统的芯片设计与

12、制造。有专家认为，21世纪将是四A技术的高速发展期，EDA技术将是对21世纪产生重大影响的十大技术之一。EDA technology: the concept of EDA is electronic design automation (E1echonics Des5p AM toM60n). Because it is a newly developed new technology, wide range, rich in content, different understanding, so there is no a precise definition. But content

13、from several main aspects of EDA technology, can be understood as: EDA technology is based on large-scale programmable logic devices design carrier, hardware description language for the system logic which is used to describe the main expression way, with the computer, the development of large-scale

14、 programmable logic devices software and experiment development system for the design tool, through the development of software, automatic electronic system to the hardware design with software system of a new technology. Can realize logic compilation, logical reduction and logical segmentation, log

15、ic synthesis and optimization, logical layout, logic simulation. Compile fit for a particular target chips on download, logical mapping, programming, etc, finally form the integrated electronic system or special integrated chip. EDA technology is accompanied by computer, integrated circuit, electron

16、ic system design, has been more than 30 years of history. Can be roughly divided into three stages of development. CAD (computer-aided design) phase in the 1970 s: the main feature of this stage is to use computer aided circuit principle diagram editor, PCB cloth with wiring, makes the designer from

17、 the traditional highly repetitive multifarious drawing work. To them from the 1980 s stage (computer aided engineering design) : the main feature of this stage is based on logic simulation, timing analysis, fault simulation, automatic layout as the core, the key to solve the problem of the function

18、 test, etc the circuit design, can make a design and predict the function of the product before production and performance. Spit ji as s is the EDA (electronic design automation) stage: this stage is a high-level description language, is the main feature of the system level simulation and comprehens

19、ive technology for characteristic, USES the top-down design concept, the design of many high level design are done by EDA tools. EDA is electronic design automation technology, which can help people to design electronic circuit or system software tools. The tool can play a role in all aspects of ele

20、ctronic product design phase, made it possible to design more complex circuits and systems. In the schematic design phase, you can use the correctness of the design EDA simulation tools in the argument; In chip design phase, can use the chip in the EDA design tool design of the chip layout: in the P

21、CB design phase, you can use the EDA in the design multilayer circuit board PCB design tools. Especially support hardware description language of the emergence of EDA tools, make the design of complex digital system automation is possible, as long as the behavior of the digital system with hardware

22、description language description is correct, you can proceed to chip design and manufacture of the digital system. Some experts believe that the 21st century will be one of four A technology high speed development, EDA technology will be the 21st century one of the top ten technology have A signific

23、ant impact.EDA技术的基本特征:EDA代表了当今电子设计技术的最新发展方向，利用EDA工具，电子设计师可以从概念、算法、协议等开始设计电子系统，大量工作可以通过计算机完成，并可以将电子产品从电路设计、性能分析到设计出IC版图或PCB版图的整个过程在汁算机上自动处理完成。设计者采用的设计方法是一种高层次的”自顶向下”的全新设计方法，这种设汁方法首先从系统设计人手，在顶层进行功能方框图的划分和结构设计。在方框图一级进行仿真、纠错并用硬件描述语言对高层次的系统行为进行描述，在系统一级进行驶证。然后，用综合优化工具生成具体门电路的网络表，其对应的物理实现级可以是印刷电路板或专用集成电路(A

24、SIC)。设计者的工作仅限于利用软件的方式，即利用硬件描述语言和EDA软件来完成对系统硬件功能的实现。由于设计的主要仿真和调试过程是在高层次上完成的，这既有利于早期发现结构设计上的错误，避免设计工作的浪费，又减少了逻辑功能仿真的工作量，提高了设计的一次性成功率。 由于现代电子产品的复杂度和集成度的日益提高，一般分离的中小规模集成电路组合已不能满足要求，电路设计逐步地从中小规模芯片转为大规模、超大规模芯片，具有高速度、高集成度、低功耗的可编程朋IC器件已蓬勃发展起来。在EDA技术中所用的大规模、超大规模芯片被称为可编程ASIC芯片，这些可编程逻辑器件自70年代以来，经历了CPm、IzPGA 、C

25、PLD、FPGA几个发展阶段，其中CPm(复杂可编程逻辑器件)IzPGA(现场可编程逻辑器件)肩高密度可编程逻辑器件，目前集成度已高达200万门片以上，它将掩模ASIC集成度高的优点和可编程逻辑器件设计生产方便的特点结合在一起，特别适合于样品研制或小批量产品开发，使产品能以最快的速度上市，而当市场扩大时，它可以很容易地转由掩模ASIC实现，因此开发风险也大为降低。可以说CPLE)FPGA器件，已成为现代高层次电子设计方法的实现裁体。硬件描述语言(HDL)是EDA技术的重要组成部分，是EDA设计开发中的很重要的软件工具，VHDL即：超高速集成电路硬件描述语言，仍量凡是作为电子设计主流硬件的描述语

26、言。它具有很强的电路描述和建模能力，能从多个层次对数字系统进行建模和描述，从而大大简化了硬件设计任务，提高了设计较串和可靠性，用V佃L进行电子系统设计的一个很大的优点是设计者可以专心致力于其功能的实现，而不需要对不影响功能的与工艺有关的因素花费过多的时间和精力。例如一个32位的加法器，利用图形输入软件需要输入500至1删个门，而利用VHDL语言只需要书写一行“AB十C”即可。使用硬件描述语言(HDL)可以用模拟仿真的方式完成以前必须设计和制作好的样机上才能进行的电子电路特性的说明和调试。能在系统行为级就发现可能出现的错误、问题，并加以多次反复修改论证，避免了物理级器件的损伤和多次制作，节约了时

27、间和开发成本，缩短了电子系统开发的周期。将EDA技术与传统电子设计方法进行比较可以看出，传统的数字系统设计只能在电路板上进行设计，是一种搭积木式的方式，使复杂电路的设计、调试十分困难；如果某一过程存在错误查找和修改十分不便；对于集成电路设计而言，设计实现过程与具体生产工艺直接相关，因此可移植性差；只有在设计出样机或生产出芯片后才能进行实泅，因而开发产品的周期长。而电子EDA技术则有很大不同，采用可编程器件，通过设计芯片来实现系统功能。采用硬件描述语言作为设计输入和库(LibraIy)的引入，由设计者定义器件的内部逻辑和管脚，将原来由电路板设计完成的大部分工作故在芯片的设计中进行。由于管脚定义的

28、灵活性，大大减轻了电路图设计和电路板设计的工作量和难度，有效增强了设计的灵活性，提高了工作效率。并且可减少芯片的数量，缩小系统体积，降低能源消耗，提高了系统的性能和可靠性。能全方位地利用计算机自动设计、仿真和调试。The basic characteristics of the EDA technology: EDA represents the direction of the latest development of the modern electronic design technology, the use of EDA tools, electronic stylist can

29、be from concept, algorithm, agreement, etc began to electronic system design, a lot of work can be done through the computer, and electronic products can be from circuit design, performance analysis to design the IC territory or PCB layout the whole process of the juice machine automatic processing

30、is completed. Designers design method of using is a high level of top-down new design method, this method first set juice from system design, on the top floor of a functional block diagram and structure design. At the block level simulation, error correction. And high level of system behavior by har

31、dware description language description, at the system level into the vehicle. Then, use comprehensive optimization tools to generate specific gate network list, the corresponding physical implementation class can be a printed circuit board or application-specific integrated circuit (ASIC). The desig

32、ners work is limited to use the software, it is using hardware description language and EDA software to complete for the realization of the function of the system hardware. Due to the design of the main simulation and debugging process is done at a high level, which is conducive to early detection o

33、f errors in the design of the structure, avoid the waste of design work, and reducing the workload of logic function simulation, improves the design of the one-time success rate. Due to the complexity and integration of modern electronic products is increasing day by day, general separation can not meet the requirements of small and medium scale integrated