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1、本科毕业论文本科毕业论文1外文资料与中文翻译外文资料与中文翻译外文资料：外文资料：1 microcontroller features of the development of technology SCM has been there since, SCM technology has gone through nearly 20 years of development journey. Throughout the past 20 years of SCM Exhibition history we can see that the SCM technology to the deve
2、lopment of the microprocessor (MPU) technology and ultra-large-scale integrated circuit technology for the Exhibition for the pilot to pull a wide range of applications, showing more personality than the microprocessor trend of development：SCM long life here said the long-life, on the one hand refer
3、s to the development of SCM products can be stable and reliable work 10, 20, on the other hand refers to the microprocessor compared to the long life. With the rapid development of semiconductor technology, MPU replacement faster, to 386,486,586 as the representative of the MPU, within a very short
4、time to be out of Bureau, and the traditional microcontroller as 68 HC05, 8051, and so has been 15 years of age, the output is still rising. This is from Its application to the corresponding areas of adaptation, on the other hand is due to such CPU as the core, integrated with more I / O functions S
5、CM module of the new series emerging. It is expected that the successful listing of the relatively young core CPU, also with the The I / O modules of the rich, have a long life cycle. New types of joining the CPU, the SCM team Has grown to the user brings more choice. 8, 16, 32-bit microcontroller c
6、ommon development this is the current SCM technology development trends of the other. For a long time, single - Machine 本科毕业论文本科毕业论文2technology is the development of eight-oriented. As mobile communication, network technology, multimedia technology, and other high-tech products Access to family, 32-
7、bit microcontroller applications have been developed by leaps and bounds. Motorola 68K for the CPU to the 32 of the 97 SCM August sales of 10 million. That because of the past eight SCM function is growing, more and cheaper 32-bit machine, 16 SCM living space is limited, and 16-bit microcontrollers
8、from the development of both varieties and production, in recent years have substantially more。 Of growth. SCM faster development in the MPU demonstrated by the faster clock frequency is increasing as the hallmark。The. The SCM is different, to enhance SCM anti-disturbance capacity, lower noise and l
9、ower clock frequency without sacrifice SCM offerings computing speed is the pursuit of technological development.8051 MCU with some manufacturers to improve the internal when the MCU Sequence, without raising the clock frequency of conditions, to raise a lot faster, Motorola MCU is used Suo Ring of
10、technology or internal frequency technology to the internal bus speed significantly higher than the frequency of the clock generator. 68HC08 microcontroller to 4.9 M with external and internal clock oscillator of 32 M, and 32-bit microcontroller series M68K the use of 32 K external oscillator freque
11、ncies Up to 16 MHz internal clock above. Low-voltage and low power consumption since the mid-1980s, NMOS technology SCM gradually replace the CMOS process, the power to Dropped substantially, with the ultra-large-scale integrated circuit technology from 3 m of development to 1.5,1.2,0.8,0.5,0.35。And
12、 the realization of nearly 0.2 m technology, all designed so that static clock frequency from DC to several trillion optional, so that power consumption declining Motorola recently introduced optional M. CORE in 本科毕业论文本科毕业论文3the 1.8 V voltage to 50 M/48MIPS work at full speed, power is about 20mW. A
13、lmost all the SCM has Wait, Stop, and other power-saving operation mode. Allowing the use of the power supply voltage range Increasingly wide. General SCM can be three to 6 V work within the framework of the battery-powered SCM is no longer the need for power - Regulators take measures. SCM low-volt
14、age power supply has been lower limit of 2.7 V to 2.2 V, 1.8V. The single 0.9V power supply Machine has come out. Low noise and high technology to improve the reliability of the system MCU-electromagnetic interference ability, so that products can adapt to the adverse For the environment, to meet hi
15、gher standards of electromagnetic compatibility requirements, the SCM businessmen in the internal circuits to SCM A number of new technical measures. NS such as National Semiconductors internal COP8 SCM increased anti-EMI circuit, and strengthened “Watchdog“ performance. Motorola also introduced a l
16、ow-noise LN series of SCM. OTP and mask OTP is a one-time written into the SCM. SCM past that a product is put into operation mask of maturity As the hallmark of the SCM. As we need to mask the production cycle, while OTP-decline Singlechip prices, making In recent years the use of direct OTP completed the final product manufacturers more popular. It compared to mask a short production cycle, the small risk Characteristics. In recent years, OTP type of microcontroller to be significan
