【正文】 d colorful. Comprehensive above, the MCS51 has bee a puter development and application of an important aspect. On the other hand, the importance of MCS51application also is that it fundamentally changed the traditional control system design concepts and design methods. From the past must be digital or analog circuits to achieve the most functional, it is now MCS51 software can be used to achieve the method. This software instead of hardware control technology, known as microcontrol technology, is a traditional control technology revolution.MCS51的發(fā)展和應(yīng)用MCS51單片機是美國INTE公司于1980年推出的產(chǎn)品，與MCS48單片機相比，它的結(jié)構(gòu)更先進，功能更強，在原來的基礎(chǔ)上增加了更多的電路單元和指令指令數(shù)達111條，MCS51單片機可以算是相當(dāng)成功的產(chǎn)品，一直到現(xiàn)在，MCS51系列或其兼容的單片機仍是應(yīng)用的主流產(chǎn)品，各高校及專業(yè)學(xué)校的培訓(xùn)教材仍與MCS51單片機作為代表進行理論基礎(chǔ)學(xué)習(xí)。 　　Siemens公司也沿用C51的內(nèi)核，相繼推出了C500系列單片機，在保持了與C51指令兼容的前提下，其產(chǎn)品的性能得到了進一步的提升，特別是在抗干擾性能，電磁兼容和通信控制總線功能上獨樹一幟，其產(chǎn)品常用于工作環(huán)境惡劣的場合。 　　MCS51的指令系統(tǒng)近乎完善，指令系統(tǒng)中包含了全面的數(shù)據(jù)傳送指令、完善的算術(shù)和邏輯運算指令、方便的邏輯操作和控制指令、對于編程來說，是相當(dāng)靈活和方便的。MCS51的應(yīng)用領(lǐng)域 ：MCS51廣泛應(yīng)用于儀器儀表、家用電器、醫(yī)用設(shè)備、航空航天、專用設(shè)備的智能化管理及過程控制等領(lǐng)域，大致可分如下幾個范疇：?？梢赃@樣說，現(xiàn)在的家用電器基本上都采用了MCS51控制，從電飯褒、洗衣機、電冰箱、空調(diào)機、彩電、其他音響視頻器材、再到電子秤量設(shè)備，五花八門，無所不在。MCS51單片機廣泛地用于各種實時控制系統(tǒng)中。這種軟件代替硬件的控制技術(shù)也稱為微控制技術(shù)，是傳統(tǒng)控制技術(shù)的一次革命。自從MCS51單片機誕生以來，它就步入了人類生活當(dāng)中，如洗衣機、電冰箱、電子玩具、家用電器，例如，收錄機配上單片機后，提高了智能化程度，增加了功能，倍受人們喜愛。例如工廠流水線的智能化管理，電梯智能化控制、各種報警系統(tǒng)，與計算機聯(lián)網(wǎng)構(gòu)成二級控制系統(tǒng)等。單片機屬于典型的嵌入式系統(tǒng)，所以它是低端控制系統(tǒng)最佳器件。從而容易使產(chǎn)品形成系列化。 　　PHILIPS公司在發(fā)展C51的低功耗，高速度和增強型功能上作了不少貢獻，當(dāng)初主要由其來發(fā)展C51單片機，他們的83Cxx和87Cxx系列省去了并行擴展總線，適合于作為家用電器類控制的經(jīng)濟型單片機。The development and application of MCS51MCS51 singlechip was producted in the United States INTE panies in 1980, and pared with MCS48 singlechip the structure of it has more advanced and more powerful, in the original basis of the circuit an increase of more units and directive amounted to 111, MCS51 single chip can be regarded as very successful product, until now, MCS51 series or patible singlechip applications is still the mainstream product, colleges and universities and professional schools, training materials remained in line with the MCS51 singlechip, as the theoretical foundation for learning. We also carry out the representation of system models to explain. The range of MCS51 singlechip 8031,8051 and 8751 mainly includes products such as GM, its main function is as follows: 8bit CPU 4kbytes program memory (ROM) 128bytes of data memory (RAM) 32 Article I / O port 111 mand line. Most of the 21 singlebyte instruction register 2 dedicated programmable timer / counter interrupt source 5, a twopriority, fullduplex serial munication port to external data memory address space for external 64kB program memory address space for 64kBbit addressing logic operation function 40PinDIP dual inline package Single +5 V Power Supply MCS51 with its typical structure and improve the special registers of the bus centralized man