【正文】 preparation process you can achieve high intelligence,high efficiency and high reliability! Because of cost of singlechip is sensitive,so the dominant software or the lowest level assembly language,which is in addition to the lowest level for more than binary machine code of the language ,since such a lowlevel so why should we use ?Many of the seniors language has reached a level of visual programming why is it not in use ?The reason is simple ,that is,singlechip puter as there is no home of CPU,also not as hard as the mass storage visualization of small highlevel language program,even if there is only one button which will reach the size of dozens of K! For the home PCs hard drive is nothing,but in terms of the singlechip microputer is in the utilization of hardware resources have to do very high ,so the pilation of the original while still in heavy use .The same token ,if the puter giants operating system and appplications run up to get the home PC,homePCcan not afford to sustain the same. It can be said that the twentieth century across the three “power”of the times,that is ,the electrical era,the electronic age and has now entered the puter age. However ,such a puter,usually refers to a personal puter,or consisits of the host ,keyboards,displays .And other is also a type of puter,not how most people are familiar with . This puter is smart to give a variety of mechanical singlechip(also known as microcontroller).As the name suggests,these puter systems use only the minimum of an integrated circuit to make a simple calculation and control. Because of its small size,are usually charged with possession of machine in the “belly”in. It in the device,like the human mind plays a role, it is wrong,the entire device was paralyzed .Now,this single chip has a very wide field of use,such as smart meters,realtime industrial control,munications equipment,navigation systems,and household appliances. Once a variety of products with the use of the singlechip ,will be able to play so that the effectiveness of product upgrading,product names often adjective before the word “intelligent”,such as washing machines and so present,some technical personnel of factories or other amateur electrtonics developers from engaging in certain products ,not the circuit is too plex ,that is functional and easy to be too simple reason may be the product not on the cards or the use of singlechip programmable logic device on the other. history singlechip 70 was born in the late 20th century,experienced a SCM,MCU,SOC three stages. Singlechip microputer that(Single Chip Microputer)stage,is mainly a single from to find the best of the best embedded systems architecture.”Innovation model”to be successful,lay the SCM with the generalpurpose puters,a pletely different path of development . In embedded systems to create an independent development path,Intel Corporation credit. That is microcontroller(Micro Controller Unit)stage,the main direction of technology development: expanding to meet the embedded applications,the target system requirements for the various peripheral circuits and interface circuits,to highlingt the target of intelligent covers all areas related with the object System,therefore,the development of MCU inevitably fall on the heavy electrical,electronics manufacturers. From this point of view ,Intels development gradually MCU has its objective in the development ,the most famous manufacturers when the number of Philips Corporation. Philips in embedd