1、EDA外文翻译可编程逻辑控件CPLDFPGAElectronic Design AutomationEDA (Electronic Design Automation, Electronic Design Automation) technology is the modern field of electrical engineering a new technology, which provides computer-based information technology and circuit design methods. EDA technology development an
2、d application of greatly promoted the development of the electronics industry. With the development of EDA technology, hardware design of electronic circuits can rely on almost all computers to accomplish, thus greatly shortening the cycle of hardware electronic circuit design, enabling manufacturer
3、s to quickly develop a variety of small quantities of products to meet the market demand. EDA technology, the basic idea is the help of computers, the EDA software platform to complete electronic circuit design, simulation and PCB design of the entire process. For more complex circuits, if necessary
4、, can be used to implement programmable logic devices. EDA technology not only on the Electronic Course and analysis of simulation experiments to address the variety of laboratory components, specifications and quantity restrictions are not sufficient to avoid damage to the students in the lab compo
5、nents and devices to stimulate interest in learning, to develop their analysis, electronic product design and development ability, but also e-workers to design, develop a powerful tool for electronic products. Thinking of EDA technology education and industry promotion is a technology hot spot in to
6、days world, EDA technology is indispensable in the modern electronics industry to a technology. EDA technology has a broad meaning, but also a progressive development of the field has a strong vitality. Todays EDA technology has reached a system on a chip (SOC, System On Chip) stage. Developers can
7、use the powerful EDA design software, the use of IP (Intellectual Property) IP core, coupled with his innovative thinking, and build their own custom chips, which have their own IP rights to design specific integrated circuit (ASIC, Application Specific IC .) EDA technology in the popularity of teac
8、hing, practical applications based on programmable device technology, which includes four basic conditions: large-scale programmable devices, it is the use of EDA techniques carrier electronic system design; hardware description language It is the use of EDA technologies for electronic system design
9、, the main means of expression; software development tools, it is the use of EDA technologies for intelligent electronic system design automation design tools. experimental development system, which is the use of EDA technology for electronic systems Download tools and hardware design verification t
10、ools. Programmable Logic Control (CPLD / FPGA) In our design, we was selected CPLD / FPGA, as compared with the traditional MCU has many advantages, mainly in the following areas: advanced programming very easy. CPLD / FPGA products, part of the daisy chain in-system programming mode. This advanced
11、method of programming has become the worlds development trend of various types of programmable devices. Because it obviates the expensive and inconvenient operation dedicated programmer, just need to download a very simple programming circuit and a PC, printer communication cable on the line. It is
12、not programmed pressure, the TTL level line can be programmed at any time, and the so-called multi-chip daisy chain serial programming. Its programming up to 1 million times, such as Lattices isles and AMDs MACH family. In addition, programming can easily achieve infrared, ultrasonic or radio progra
13、mming programmer, or through the telephone line remote online programming. These features are in communication devices and military special purpose devices. high speed. CPLD / FPGA clock delay of up to ns level, combined with the parallel work, in the ultra high-speed real-time monitoring and contro
14、l applications and has a very broad application prospects. If you use the FLEX10K50 ALTERA development network image through USB interface, real-time encryption / decryption ASIC system, carried out in FLEX10K50 up to 56-bit parallel binary arithmetic, each encryption / decryption cycle of only a fe
15、w s, and the MCU takes nearly 1 minute . Another example is in the mold manufacturing EDM processing, motor control, the effective operation of the processing parts from only a few s, which is required for the control of sensitive and high-speed circuit feeding service, not a short circuit or arcing
16、 is less than the breakdown . Obviously, this work, MCU is difficult to directly participate. If direct feeding by ispLSI1032 service control, feeding on the closed-loop motor speed service, the use of sampling ispLSI direct control of the AD1674, 8-bit accuracy using a maximum speed of 8s / each, i
17、n order to achieve a good closed-loop speed control of synchronous and . high reliability. In high reliability applications, MCUs shortcomings as a CPLD / FPGA application left a lot of useless. Although the function of this group developed the device is achieved through the EDA software. But the ph
18、ysical mechanism like a 74LS164 as purely a hardware circuit is very reliable. Through the rational design of most applications, no need to consider the complex reset and initialization. Design using a simple statement just idle initial entry into the same, we can effectively prevent any possible de
19、ath phenomenon. Because it is working in parallel, it can be used as either input pin interrupt monitoring is similar to pin MCU, and the reaction rate is only satisfied wonderful class. CPLD / FPGA, high reliability is also reflected in almost the entire system can be downloaded on the same chip, t
20、hus greatly reducing the volume, easy to manage and shielding. powerful, applications are broad. Currently, CPLD / FPGA to select a large range, according to different applications use different capacity chips, such as Lattices ispLSI and AMDs MACH, the smallest chip for the 1000 equivalent logic ga
21、tes, the largest of several one hundred thousand . ALTERA and XILINX gate introduced millions of CPLD / FPGA can achieve almost any form of digital circuits or digital systems design. With the wide application of such devices and the cost dropped significantly, and the market rate increase, CPLD / F
22、PGA in the system rate is almost equal to the direct application of ASIC development. easy to use, develop convenient. The design of SCM experts in application system is very simple. However, for beginners, such as the CPUs work, many of the usage of special registers, interrupt concepts, etc., real
23、ly is not an easy task. In contrast, CPLD / FPGA application does not require too much preparation to learn the knowledge, as long as a little bit of design of digital circuits and computer software basics, you can in the short term to handle basic design and development skills. And in turn, to lear
24、n to use SCM, it appeared hundreds of times more. This is undoubtedly high for us to provide a shortcut to learning, standing on the shoulders of giants, of course faster to be successful. It can be predicted, the study of EDA technology boom and the CPLD / FPGA application boom never inferior to bo
25、om over the past 10 years, single chip. short development cycle. EDA software features as the corresponding sound and powerful, convenient and real-time simulation capabilities, and intuitive image of the development process, and the hardware factors involved very little, it can be very complicated
26、in a very short time the system design, which is the product to market quickly the most valuable features. Some EDA experts predict, the future of large-scale systems of CPLD / FPGA design is just all kinds of logic and then apply the IP core (CORE) of the assembly, the design cycle, only hour. TI c
27、ompany that eighty percent of an ASIC IP core features available such as ready-made logic synthesis. 1.Development of language VHDL VHDL (Very High Speed Integrated Circuit Hardware Description Language) is a very high speed integrated circuit hardware description language, it can describe the funct
28、ion of the hardware circuitry, signal connectivity and the time between languages. It can be more effective than the circuit diagram to express the characteristics of the hardware circuit. Using the VHDL language, you can proceed to the general requirements of the system, since the detailed content
29、will be designed to come down to earth, and finally to complete the overall design of the system hardware. IEEE VHDL language has been the industry standard as a design to facilitate reuse and sharing the results. At present, it can not be applied analog circuit design, but has been put into researc
30、h. VHDL program structure, including: entity (Entity), structure (Architecture), configure (Configuration), Package Collection (Package) and the Library (Library). Among them, the entity is the basic unit of a VHDL program, by entity and the structure of two parts: the physical design system that is
31、 used to describe the external interface signal; structure used to describe the behavior of the system, the system processes or system data structure form. Configuration select the required language from the library system design unit to form different versions of different specifications, so that t
32、he function is designed to change the system. Collection of records of the design module package to share the data types, constants, subroutines and so on. Database used to store the compiled entities, the body structure, including the collection and configuration: one is the development of engineer
33、ing software user, the other is the manufacturers database. VHDL, the main features are: powerful, high flexibility: VHDL language is a powerful language structure, clear and concise code can be used to design complex control logic. VHDL language also supports hierarchical design, support design databases and build reusa
