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1、附录附录1The use and development of SCMAbstract: The composition of SCM, outlined the development and applicationfields as well as on the future prospects for the development of SCM.Keyword: MCU application development1. SCM ProfileSCM is an integrated circuit chip, using ultra-large-scale technology to
2、 a data processing capability (such as arithmetic operations, logical operators, data transmission, interrupt handling) microprocessor (CPU), random access data memory (RAM), only Reading program memory (ROM), input-output circuit (I/O I), may also include regular counters, serial communication I (S
3、CI), display driver circuit (LCD or LED drive circuit), the PWM circuit (PWM ), Analog converter and multi-channel A/D converter, and so on to a single integrated circuit chips, constitute a minimum, however perfect the computer system. These circuits in the software under the control of accurate, s
4、peedy and efficient procedures for designers to complete the tasks set out in advance.From this perspective, the MCU is not available in the microprocessor functions, it can be individually controlled by the completion of a modern industrial requirements of the intelligent control functions, which i
5、s the largest MCU features.However, MCU is different from the SBC, chips in the absence of development, it is only a function of the strong ultra-large-scale integrated circuits, if entrusted to it specific procedures, it is a minimum, the integrity of the micro-computer control system, With the SBC
6、 or personal computer (PC machines) are essentially the difference between the application of a microcontroller chip-level applications, users need to understand the structure and microcontroller chips command system and other applications of integrated circuits and system design technology required
7、 The theory and technology, with such a specific chip design applications, thus making the chips with specific functions.SCM has different characteristics of different hardware and software features, that is, their technical characteristics are different, depending on the hardware features of the in
8、ternal structure of microcontroller chip, users want to use a microcontroller, we must understand this type of product Meet the needs of the function and application of the required indicators. Here the technical features include features, and control of electrical characteristics, and so on, they n
9、eed information from the manufacturers have the technical manual. Software feature is that instruction of environment and development support, command of which we are familiar with the SCM addressing, data processing and handling of logic, input and output characteristics and the requirements of the
10、 power supply and so on. Support the development of the environment, including the compatibility of command and portability, support software (including applications to support the development of the software resources) and hardware resources. To use a certain model of SCM to develop their own appli
11、cations, master of its structural features and technical characteristics is necessary.SCM control system to replace the former use of complex electronic circuits or digital components of the control system, the software can control to achieve and be able to achieve intelligent, and now ubiquitous SC
12、M control areas, such as communication products, home appliances, smart instrumentation , Process control and exclusive control devices, and so on, the MCU applications more widely.It is true that the SCM application of its significance far from being limited to the scope of application or the resul
13、ting economic benefits, more importantly, it has fundamentally changed the traditional control methods and design ideas. Control technology is a revolution, is an important milestone.2. MCU development outlined1946 first electronic computer was born So far, only 50 of the time, relying on micro-elec
14、tronics technology and semiconductor technology advances, from the tube - transistors - integrated circuits - large-scale integrated circuits, now a fully integrated on a chip several Millions or even 10 million transistors, making computers smaller, more powerful. Especially the past 20 years, the
15、rapid access to computer technology to the development of the computer industry and agriculture, scientific research, education, defense and aerospace field of a wide range of applications, computer technology has been a country of modern technology is an important indicator of the level.SCM was bor
16、n in the 1970s, the company developed as Fairchid F8-chip micro-computer. SCM is the use of so-called large-scale integrated circuit technology to the central processing unit (Center Processing Unit, that is often called the CPU) and data memory (RAM), program memory (ROM) and other I/O communication integrated in a chip mouth , One of the least of a computer system, and modern SCM is the addition of the interruption unit, regular units and A/D converter, and other
