单片机的发展-毕业论文外文翻译

1、外文翻译First, the development of simulator Throughout nearly two decades of national development process of simulation technology, according to simulator technology to be used to divide the domestic about the design of simulators can be divided into the following periods: (1) the late 70s in the mid -80 The technology during this period was mainly the development of simulation systems, now is not high technology, the user request is not high. (2) the late 80s during the late -90 The main use of thi

2、s period with an emulation function Winbond chip production, the technology is called Bondout. Using this chip to greatly simplify the design of emulator, so the standard of domestic emulator with a large increase can be largely occupied by the user resources. Simulation performance is due to the increase in domestic production in the emulator nearly 10 years no progress has been produced using this model. Although individual companies have also tried other techniques to improve the simulation o

3、f the standard, for example, HOOKS technology, but because of their technical limitations did not succeed. Instead abroad earlier simulator technology used HOOKS, HOOKS at the initial stage due to the complexity of the technology itself, simulation performance and price as the domestic use of the simulator Bondout. With the development of IC technology, the domestic production HOOKS technology is ripe, but several major domestic manufacturers also Bondout technologies intoxicated. (3)After 2000

4、year China in 2000 emulator period changes in the market, the largest, the most striking change is the Winbond W78958 chip simulation of the production. Winbond W78958 chip during the design stage, the internal functions of the simulation only to the production simulator to simulator manufacturers in order to better promote the W78958. After several years of change, however, W78958 simulator evolved into the use of a simulation of the ASIC rather than using the standard chip, the scope of use is

5、 limited to domestic and 20,000 a year less than the amount the company also contributed to the Winbond After entering in 2002 announced that it would stop production of the chip. W78958 production, the domestic manufacturers simulator in a very embarrassing situation. W78958 use at home as a result of nearly 10 years, the 外文翻译domestic user base is very large, these users will not be able to receive continued support, especially maintenance. In addition, the domestic focus in the W78958 on the t

6、echnical work done can not be renewed and improved, many people in the industry that the industry will face a simulator to set up or re-shuffle of the situation. HOOKS simulator technology is no doubt W78958 manufacturers after the loss of alternatives, but the absence of long-term follow-up and attention, not the short term the majority of manufacturers of complex HOOKS mature technology products. Experts believe that the overall simulator manufacturers in transition may need 2-3 years of the c

7、ycle, and there is considerable simulator manufacturers will be eliminated, the market will have mainly concentrated in a few simulator manufacturers. Chip manufacturers as more and more resources getting stronger and stronger, with chip to chip compatible simulation simulation model, there is incomplete coverage of resources (such as additional ports, additional external interrupt), address different distribution (such as the P4 I ), to operate in different ways (such as EXTRAM, WTD) and other

8、shortcomings. Simulation with a dedicated chip to chip or Philips simulation of more than 20 manufacturers more than 400 kinds of chips, the first simulation required more and more, so theres a new generation of simulator technology. But a new generation of patented technology makes the simulator there is no economic power can not afford to buy the beginners. Second, the development trend of single-chip It can be said now is a single-chip opinions of the period, the worlds major chip manufacturi

9、ng companies have introduced their own single-chip, from the 8, 16-32, just to name a few, everything, it is compatible with mainstream C51 series of , there are not compatible, but they own each other into each other, for SCM applications world wide. Throughout the development process of single-chip, you can indicate the development trend of single-chip, generally are: 1. Low-power CMOS technology MCS-51 series of 8031 introduced the power consumption of 630mW, and now widespread in the single-chip 100mW or so, with the growing demand for low-power single-chip, and now all the basic single-chip manufacturers are use of CMOS (complementary metal oxide semiconductor process). As the 80C51 on the use of 外文翻译HMOS (high density metal oxide semiconductor process) and CHMOS (high-density complementary metal oxide semiconductor process). Although the CMOS low power consumption, but because of its physical characteristics to determine its speed is not high enough, and then CHMOS

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