【正文】 executed, the PC content will automatically increase, increase the volume of the instruction length is determined, may be 1, 2 or 3, to point to the next instruction address, assurance instructions order of execution. The application of SCM Single chip microputer is posed of the hardware system and software system. Hardware system which is posed of microputer system entity and device, usually by the operator, controller, memory, input interface circuit and input devices, output interface circuit and an output device. The arithmetic unit and the controller is generally done in an integrated chip, referred to as the central processing unit ( Central Processing Unit ), referred to as CPU, is the core part of microputer. CPU with a stored program and data memory, input / output ( Input / Output, I / O ) interface circuit and an external device is posed of singlechip hardware system. The software system is a puter system used by various procedures said, through which people on the microputer control system with microputer for the exchange of information, the puter in accordance with the intention to achieve the predetermined task. The software system and hardware system together form a plete singlechip micro puter system, the two plement each other, are indispensable. Currently microcontroller perated into every aspect of our lives, it39。s or 6039。 無錫職業(yè)技術(shù)學(xué)院 系別（部、分院） 電子信息技術(shù)系 班 級(jí) 電子工藝 30901 姓 名 學(xué) 號(hào) 課 題 名 稱 電熱箱單片機(jī)溫控系統(tǒng) 指 導(dǎo) 教 師 職 稱 講師 指 導(dǎo) 教 師 職 稱 工程師 2021 年 4 月 12 日 英文 Single chip micro puter referred to as SCM, is a typical embedded microcontroller ( Microcontroller Unit ), mon English letter abbreviation of MCU MCU, it was originally used in the field of industrial control. Due to the microputer in the field of industrial control applications, to make more the personage inside course of study, students, hobbyists, product development staff master microcontroller this technology, then MCU development board, the more famous example of electronic DZR01A MCU development board. Chip by chip CPU only dedicated processor and development. The earliest design concept is the large number of peripherals and CPU integrated on a chip, allowing the puter system to a smaller, easier to integrate into the plex and the volume requires strict control of the equipment. INTEL Z80 is the earliest according to this thought design of the processor, from then on, the development of SCM and special processor part pany each going his own way. Early SCM are 8 or 4 bit. One of the most successful INTEL 8031, because simple reliable and good performance achieved great acclaim. Thereafter in 8031 on the development of the MCS51 series single chip system. Based on this system of single chip microputer system is still widely used. As the field of industrial control requirements increase, began a 16 bit single chip microputer, but because the price is not ideal did not have a very wide range of applications. After 90 years with the consumer electronic product development, SCM technology has a huge increase. Along with the INTEL i960 series especially later ARM series of widely used, 32 bit single chip microputer rapidly replaced the 16 bit MCU high position, and into the mainstream market. While the traditional 8 bit SCM performance has also been enhanced rapidly, handling capacity pared to 80 in increased hundreds of times. At present, the highend 32 bit single chip microputer frequency is more than 300MHz, performance was 90 time metaphase dedicated processor, and mon models of the exfactory price fell to $1, the most highend models only $10. The single chip microputer system has not only the bare metal environment development and use, large number of special embedded operating system is widely used in the whole series mcu. While as a palmtop puter and mobile phone core processing chip microputer and can be used directly for the Windows and Linux operating system. Single chip processor is more suitable than the special application in embedded system, so it got the most applications. The fact that SCM is the world39。s largest number of puter. Modern human life used in almost every piece of electronic and mechanical products will have a singlechip integration. Mobile phone, telephone, puter, household appliances, electronic toys, handheld puters and puter accessories such as a mouse in all with 12 single chip microputer. While the PC is also a large number of single chip microputer in the work. The car is equipped with more than 40 of the general single chip microputer, the plex industrial control system and even there may be hundreds of single chip microputer in the work at the same time! Single chip not only the number of far more than PC machine and the other putes the sum, even more than human. Also known as singlechip microcontroller, it is not the pletion of a logic function of the chip, but a puter system integrated into a chip. The equivalent of a micro puter, and the puter, singlechip only lack of I / O equipment. Summary: a chip is a puter. It has the advantages of small volume, light weight, low price, for the study, application and development of facilities provided. At the same time, learn to use singlechip puter principle and structure is the best choice. MCU internal use and puter functions like modules, such as CPU, memory, hard disk and a parallel bus, and the same storage device, is it different for these ponents performance relative to both our home puter a lot weaker, but the price is low, generally not more than 10 yuan use it to do some control of electrical appliances category is not very plicated work ok. We now use automatic drum washing machine, exhaust hood, V