單片機(jī)原理畢業(yè)論文外文翻譯(編輯修改稿)
2024-12-30 04:47 本頁面
【文章內(nèi)容簡介】 equired by the instruction in question. Therefore, if you have a system which is using an clock, you can pute the number of instructions per second by dividing this value by 12. This gives an instruction frequency of 921583 instructions per second. Inverting this will provide the amount of time taken by each instruction cycle ( microseconds). 3. The SCM development trend Now can say single chip microputer as the period of the flowers, the world each big panies have launched their own SCM chip making, from 8bit, 16bit to 32bit, endless, of everything, they are all so different, mutual plement each other, for the application of single chip microputer to provide broad heaven and earth. Throughout the SCM development process, can predict SCM development trend. (1) low power consumption CMOS MCS 51 series of 8031 launched when the power of 630 mw, and now the single chip microputer generally around 100 mw, with singlechip puter power consumption requirements more and more low, now various microcontroller manufacturers generally adopted CMOS (plementary metal oxide semiconductor process). 80C51 is adopted HMOS (., high density metal oxide semiconductor) and CHMOS(plementary highdensity metal oxide semiconductor) process. CMOS low power consumption, but due to its physical characteristics determine its working speed is high enough, while CHMOS has high speed and low power consumption characteristics, these characteristics, more suitable for the low power consumption, battery powered applications. So this process will be a period microcontroller development the main way in the future. (2) miniature single chip Now the conventional SCM is generally is the central processor (CPU), random access data memory (RAM), readonly memory (ROM), parallel and serial munication interface, interrupt system, timer circuit, clock circuit integrated on A single chip, enhanced SCM integrates such as A/D converter, PMW (pulse width modulation circuit), WDT (watchdog), some single chip LCD driver circuit are integrated on A single chip, which microcontroller contains unit circuit is more, the more powerful. Even single chip manufacturers can also be customized according to user39。s requirements, create with their characteristics of singlechip microputer. In addition, now product is generally require small size, light weight, which requires the microcontroller in addition to the strong function and low power consumption. (3) mainstream coexist with many varieties Now although microcontroller variety, each has its own characteristics, but still with 80 c51 as the core of the singlechip puter were dom
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