Due to the rapid development of electronic technology, electronic system design methods based on EDA technology are widely used. EDA technology has become an effective tool for modern system design and electronic product development and has become a basic capability that electronic engineers should possess. This article first introduced the main features and essence of EDA technology, followed by the introduction of the EDA technology and the development trend, and finally elaborated how to learn EDA technology efficiently.
Eda technology briefEDA technology is a large-scale programmable logic device as a design carrier, and a hardware description language as the main expression of the system logic description. The computer, large-scale programmable logic device development software and experimental development system as a design tool, through the relevant Develop software to automatically complete a new technology for designing electronic systems to hardware systems using software. Logic compilation, logic simplifying, logic splitting, logic synthesis and optimization, logic layout and logic simulation can be realized. Completion of the adaptation compilation, logic mapping, programming download, etc. for a specific target chip, and ultimately the formation of integrated electronic systems or dedicated integrated chips. EDA technology is developed along with the design of computers, integrated circuits, and electronic systems. It has been more than 30 years.
EDA can be roughly divided into three stages of development. The CAD (Computer Aided Design) phase of the 1970s: The main feature of this phase was the use of computer-assisted circuit schematic editing, PCB layout and wiring, which freed the designer from the traditional highly repeated and complicated drawings.
The QtE (Computer Aided Engineering Design) phase of the 1980s: The main features of this stage are logic simulation, timing analysis, fault simulation, and automatic placement and routing as the core, focusing on solving problems such as functional detection of circuit design, and making the design It can predict the function and performance of the product before it is manufactured.
The 1990s were the EDA (Electronic Design Automation) phase: the main features of this phase were the high-level description language, system-level simulation, and integrated technologies. The "top-down" design concept was used to design many of the early stages of design. High-level design is done by EDA tools.
EDA is electronic technology design automation, that is, software tools that can help people design electronic circuits or systems. The tool can play a role in every design stage of electronic products, making it possible to design more complex circuits and systems. In the schematic design stage, the correctness of the design can be demonstrated using the simulation tools in EDA; in the chip design stage, the layout of the chip can be designed using the chip design tool in EDA: In the board design stage, the board in EDA can be used. Design tool design multilayer circuit board. In particular, the advent of EDA tools that support hardware description languages ​​makes it possible to automate complex digital system designs. As long as the hardware description language is used to describe the behavior of digital systems correctly, chip design and manufacturing of the digital system can be performed. Some experts believe that the 21st century will be a period of rapid development of EDA technology, and EDA technology will be one of the top ten technologies that will have a major impact on the 21st century.
EDA Technology Key Features
1, using software design methods to design hardware
The hardware system conversion is done automatically by the relevant development software. The design input can be the schematic VHDL language. Through the software design method testing, the hardware circuit design for a specific function is realized, and the hardware design modification work is as quick and convenient as modifying the software program. The process involves almost no hardware, and operability and product interchangeability are strong.
2, based on the chip design method
The EDA design method, also known as chip-based design method, has a higher degree of integration, enabling on-chip system integration, more complex circuit chip design and application-specific integrated circuit design, enabling small size, low power consumption, and high reliability; In system programming or on-site programming, device programming, reconstruction, and modification are simple and convenient, and online upgrades are possible; various simulations are possible, the development cycle is short, the design cost is low, and the design flexibility is high.
3, high degree of automation
Based on the design input file, EDA technology automatically processes the electronic product from the circuit function simulation, performance analysis, optimization design, and result testing to a computer and automatically generates the target system, eliminating the need for the designer to learn a lot of in-depth expertise. Many derivation calculations can achieve optimal design results. The degree of design automation is high, the designer's workload is lightened, and the development efficiency is high.
4, automatic product design
EDA technology automatically compiles, simplifies, synthesizes, simulates, optimizes, lays out, routes, adapts, and downloads programming to generate the target system based on the design input file (HDL or schematic), that is, to simulate the electronic product from the circuit function. The entire process of performance analysis, optimization design and result testing is automatically completed on the computer.
The essence of EDA technology
(1) Modeling: Refers to the use of hardware description language to describe the function of the circuit;
(2) Simulation: Refers to verifying the circuit function of the model being built;
(3) Synthesis: Synthesis refers to converting a software model into a hardware circuit.
EDA technology has developed rapidly in recent years and has played an increasingly important role in the design of electronic systems for teaching, research, communications, defense, aerospace, medical, industrial automation, computer applications, instrumentation and other fields.
(1) In teaching
Almost all colleges and universities (especially electronic information engineering) have set up EDA courses. It is mainly for students to understand the basic principles and basic concepts of EDA, master the method of using VHDL hardware description language to describe system logic, use simulation software tools to simulate the electronic circuit courses, and let students engage in the design of simple electronic systems during graduation design. To lay the foundation for future work.
(2) in scientific research
The main use of circuit simulation tools for circuit design and simulation; use of virtual instruments for product debugging; FPGA device development and application of equipment. In a CDMA wireless communication system, all mobile handsets and wireless base stations operate in the same frequency spectrum. To distinguish different calls, each mobile phone has a unique code sequence. The CDMA base station must be able to distinguish these different views of the code sequence in order to distinguish between Different paging processes; this discrimination is achieved by detecting the specific code sequence in the input data stream through the output of the matched filter; FPGA can provide a good filter design, and can complete the DSP advanced data processing function, and thus FPGA Widely used in the field of modern communications.
(3) in product design and manufacturing
From high-performance microprocessors, digital signal processors, color TVs, audio and electronic circuits, etc., EDA technology is not only used in the early stage of computer simulation, product debugging, but also in the development and production of electronic equipment, circuit board welding. The process also plays an important role. It can be said that EDA technology has become an indispensable and important part of the electronics industry.
EDA technology trendsJudging from the current EDA technology, its development trend is the government's attention, popularization, wide application, various tools, and powerful software.
The Chinese EDA market has matured, but most design engineers face the PCB board and small ASIC space. Only a small fraction (about 11%) of designers are developing complex system-on-chip devices. In order to form stronger competition with design engineers in Taiwan and the United States, it is necessary for the Chinese design team to introduce and learn some of the latest EDA technologies.
In the field of information and communication, priority should be given to the development of high-speed broadband information networks, deep sub-micron integrated circuits, new types of components, computers and software technologies, third-generation mobile communication technologies, information management, and information security technologies, and actively develop digital technologies and network technologies. Based on a new generation of information products, develop new industries and cultivate new economic growth points. It is necessary to vigorously promote informationization in manufacturing, and actively carry out computer-aided design (CAD), computer-aided engineering (CAE), computer-aided process (CAPP), computer-aided manufacturing (CAM), product data management (PDM), and manufacturing resource planning ( MRPII) and Enterprise Resource Management (ERP). Qualified companies can carry out "network manufacturing" to facilitate cooperative design, cooperative manufacturing, and participate in domestic and international competition. Carry out "digital control" and "digital" projects. The test technology, control technology, computer technology, and communication technology of the technology development trend of automated instruments are further integrated to form a measurement, control, communication, and computer (M3C) structure. In terms of ASIC and PLD design, it is developing toward ultra-high speed, high density, low power consumption and low voltage.
The combination of peripheral technology and EDA projects has a promising market outlook. For example, the combination of large screens and multi-screen technology has also grown. China has accelerated the development of the semiconductor industry since 1995, and has established several design centers to promote series of design activities to cope with competition in other EDA markets in the Asia Pacific region. In terms of EDA software development, it is currently mainly concentrated in the United States. However, countries are also working hard to develop corresponding tools. Japan and South Korea have ASIC design tools, but they are not open to the outside world. China Huada Integrated Circuit Design Center also provides IC design software, but its performance is not very strong. It is believed that in the near future there will be more and better design tools to blossom around and result. According to the latest statistics, China and India are becoming two of the fastest-growing markets in the field of electronic design automation, with annual growth rates of 50% and 30% respectively.
EDA technology has been widely used, so EDA technology is easy to learn? What do you need to learn about EDA technology? Next, learn how to learn EDA technology.
Eda technology is eager to learn how to learn EDA technologyThe eda technology contains too many meanings. The front end of the chip (verilog, vhdl, etc., rtl, simulation verification, etc.) and the backend (layout, etc.), and even software algorithms such as integrated layout and routing are related to eda. Therefore, EDA technology is not easy to learn and learn from the individual's hard work and interest. Although learning EDA is a long and painful process, learning more about materials will eventually lead to learning and success! Then we take a look at how to learn EDA technology efficiently:
1. To get the EDA tutorial, we need to understand the components of the content it writes, and then to look at the choice, first of all to understand the concept of EDA, and then know why you want to learn it!
2. Under normal circumstances, we understand it through the introduction of EDA in the first chapter. EDA devices can be divided into FPGAs and CPLDs. In fact, these two devices are not very different, but there are some internal differences, but all are Belongs to the EDA category!
3. After learning about the chip, we should learn to compile the software. Generally we are dealing with Quartues II software. We have to learn how to use it so that we can download the program to the chip to work.
4, then the hardware description language appearance, we can learn vhdl or verilog HDL hardware description language, verilog HDL description structure in these two languages ​​is more convenient, of course, vhdl is also good! You can also learn both!
5, light learning software and language is not enough, we also need to look at how the predecessors designed the hardware structure, see the author gives examples, learn the programming methods of these small devices, go to the computer to write, see if they can also Write the program!
6, Finally, we should still do experiments, in the experiment box to verify their own program written in the end right, first in the QUARTUES II software simulation program, and then downloaded to the experiment box, basically as long as the functional simulation is right, The experimental results are also correct!
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