【正文】 characteristics:(1) more suitable for pleting various algorithm CPLD device logic, and the bination of FP GA is more suitable for plete temporal logic. In other words, the FPGA is more suitable for flipflop, and lots of structure is more suitable for CPLD limited and a rich trigger the structure of the product.2 continuous type wiring structure of CPLD determines its temporal delay is uniform and predictable, and FPGA segmented wiring structure of decide their delayed unpredictability.(3) than CPLD in programming FPGA even greater flexibility. CPLD by modifying with fixed logic functions within the even circuit to programming, FPGA mainly through change the internal connection wiring to programming。 FP GA can be in logic, and CPLD is door in programming logical block programming.(4) the FPGA integration has more than CPLD high, the plex cabling structure and logical realized.(5) than the FPGA use up more CPLD device convenience. CPLD programming using E2PROM or FASTFLASH technology, without external memory chips, simple to use. And FPGA programming information should be stored in external memory and method of use plex.The FPGA application:1. In the circuit design. Application of the FPGAConnect logic, control logic is FPGA early role larger field is the cornerstone of FPGA application. In fact in circuit design the difficulty of application of FPGA pare big this request or developers should have corresponding hardware knowledge (circuit knowledge) and software application ability (development tools) this talent shortage, often are always engaged in new technology, new product development successful product will bee market based products for product designers mainstream applications in the near future, general and special IP design will bee a popular profession! Make circuit design is the premise of must have certain hardware knowledge. At this level, dry on learning, of course, started quickly is very important, the good table more waits for no one circuit development is golden bowl.2. The product designThe relatively mature technology is applied to certain areas such as munication, video, information processing and so on develop industry needs and can be industry customers accept product this aspect is mainly the FPGA technology and professional technique bined with the problem, and another is the interface problems with professional customers product design also includes professional tools products and civil products, the former, the latter focus on performance to price sensitive product design in order to realize the product function as the main purpose, FPGA technology is a means of realization in this field, the FPGA because have interface, control, function IP, characteristics such as embedded CPU conditions, implement a simple structure, Curing degree high, fully functional system product design will be the FPGA technology using the vast market, for great explosive demand space of technical personnel product design the demand is higher, but now is a long journey to the industry is in form starting team state, as long as join, promising product design is a professional development direction location, not simple hobbies can do it! Product design domain will foster a large number of enterprises and entrepreneurs, is a recent development hot and opportunities.3. The systemlevel applicationsSystemwide application is with traditional puter technology FPGA realizing a FPGA, bining with the puter system such as version Xilinx V 4, V 5 series of FPGA, realize inline POWER PC CPU, then cooperate with various peripheral function, achieve a basic environment, in this platform run LINUX system such as the system also will support various standard peripherals and functional interfaces (such as image interface) this constitutes a FPGA large system for fast it is very helpful. This very strong fortress flavour early advantage is not necessarily very obvious system, similar to the ARM system circumstances but if can slowly the advantage of exerting FPGA, To gradually realize some characteristic system is also a kind of development direction. If in the system level applications, the developers don39。t have system expansion and development capabilities, but since programming is meaningless, of course, the device driver development is another kind of circumstance, make the systemlevel application seemingly high starting point, but do not have deep development ability, will probably bee lovers, like a lot of people will do web but not called will programming similar above is some personal development, the hope can help wanted to learn the FPGA but very all bewildered thinking. The same reason This is a good profession, a very good personal success opportunity. But it is certainly a very petitive industry, the key to look the speed and depth and of course the market adaptiveness.The latest application:Beijing time on December 30th 2010 news, American and British scientists have developed jointly one paragraph speed super fast puter chip, make the current desktop puting capacity improvement 20 times. The current personal puters use dualcore, 4 nuclear, 16 processors to perform various tasks. Now, . and British researchers development the central processing unit (CPU) will 1000 kernel effective integration in a chip. The breakthrough in the next few years or to open a new era of ultrahigh speed operation, make family users no longer have to slow puter system feel depressed. Although faster, but due to the new super puter energy far below the current puter, so more environmental protection.The researchers used a technique called field programmable gates array (hereinafter referred to as the FPGA) chip, making microchips like contain millions of transistors, and the transistor is as the basic ponent of any circuit. However, the FPGA chip can be installed to specific users and their function is not circuit in factory set good. That way, users can be divided into a s