【文章內(nèi)容簡(jiǎn)介】 esigned to debug into the device selection, peripheral device adapter work. Electronic technology, and electronic products enriched, electronic engineers to reduce the difficulty, but at the same time, radio technology, electronic technology has weakened the charm. The development of semiconductor integrated circuits classical electronic systems are maturing, remain in the large scale integrated circuit other than the shrinking of electronic technology, electronic technology is not the old days of radio fun times and prehensive engineering training. Third, from the classic era of electronic technology to modern electronic technology of the times 80 years into the 20th century, the century of economic change is the most important revolution in the puter. The puter revolution in the most important sign is the birth of the puter embedded applications. Modern puter numerical requirements should be born. A long period of time, is to develop the massive puter numerical duty. But the puter shows the logic operation, processing, control, attracting experts in the field of electronic control, they want development to meet the control object requirements of embedded applications, puter systems. If you meet the massive dataprocessing puter system known as generalpurpose puter system, then the system can be the embedded object (such as ships, aircraft, motorcycles, etc.) in a puter system called the embedded puter. Clearly, both the direction of technology development are different. The former requires massive data storage, handling, processing and analysis of highspeed data transmission。 while the latter requires reliable operation in the target environment, the external physical parameters on highspeed acquisition, analysis and processing logic and the rapid control of external objects. It will add an early generalpurpose puter data acquisition unit, the output driver circuit reluctance to form a heat treatment furnace temperature control system. This generalpurpose puter system is not possible for most of the electronic system used, and to make generalpurpose puter system meets the requirements of embedded applications, will inevitably affect the development of highspeed numeric processing. In order to solve the contradiction between the development of puter technology, in the 20th century 70s, semiconductor experts another way, in full accordance with the electronic system embedded puter application requirements, a microputer39。s basic system on a chip, the formation of the early SCM (Single Chip Microputer). After the advent of single chip in the puter industry began to appear in the generalpurpose puter systems and embedded systems the two branches. Since then, both the embedded system, or generalpurpose puter systems have been developed rapidly. Although the early generalpurpose puter converted the embedded puter systems, and real embedded system began in the emergence of SCM. Because the microcontroller is designed specifically for embedded applications, the MCU can only achieve embedded applications. MCU embedded applications that best meet environmental requirements, for example, chiplevel physical space, largescale integrated circuits lowcost, good peripheral interface bus and outstanding control of instruction. A puter system microcontroller core, embedded electronic systems, intelligent electronic systems for the foundation. Therefore, the current single chip electronic system in widespread use of electronic systems to enable rapid transition to the classical modern intelligent electronic systems. 4, single chip to create the modern era of electronic systems A microcontroller and embedded systems Embedded puter systems from embedded applications, embedded systems for early generalpurpose puter adapted to the object system embedded in a variety of electronic systems, such as the ship39。s autopilot, engine monitoring systems. Embedded system is primarily a puter system, followed by it being embedded into the object system, objects in the object system to achieve required data collection, processing, status display, the output control functions, as embedded in the object system, embedded system puter does not have an independent form and function of the puter. SCM is entirely in accordance with the requirements of embedded system design, so SCM is the most typical embedded systems. SCM is the early application of technical requirements in accordance with the design of embedded puter chip integration, hence the name single chip. Subsequently, the MCU embedded applications to meet the growing demands of its control functions and peripheral interface functions, in particular, highlight the control function, so has international name the single chip microcontroller (MCU, Microcontroller Unit). 2 MCU modern electronic systems consisting of electronic systems will bee mainstream MCU is a devicelevel puter systems, it can be embedded into any object system to achieve intelligent control. Small to micromachinery, such as watches, hearing aids. Lowcost integrated devicelevel, lowto a few dollars, ten dollars, enough to spread to many civilian SCM appliances, electronic toys to go. SCM constitutes a modern electronic systems has indepth to the households, are changing our lives, such as home audio, televisions, washing machines, microwave ovens, telephones, security systems, and air conditioners. SCM innovation the original electronic systems, such as microwave ovens use SCM, it can easily set the clock, the program memory, power control。 air conditioner after use of SCM is not only convenient for remote parameter setting, running automatically transform, frequency control can be achieved. At present, many household appliances such as VCD, DVD only single chip to achieve its function