毕业论文——基于单片机的测速仪的设计

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1、毕业论文 【摘要】【摘要】 单片机诞生于 20 世纪 70 年代末，经历了 SCM、MCU、SoC 三大阶段。 1.SCM 即单片微型计算机（Single Chip Microcomputer）阶段，主要是寻求最 佳的单片形态嵌入式系统的最佳体系结构。 “创新模式”获得成功，奠定了 SCM 与 通用计算机完全不同的发展道路。在开创嵌入式系统独立发展道路上， Intel 公司 功不可没。 2.MCU（即）微控制器（Micro Controller Unit）阶段，主要的技术发展方向 是：不断扩展满足嵌入式应用时，对象系统要求的各种外围电路与接口电路，突 显其对象的智能化控制能力。它所涉及的领域都

2、与对象系统相关，因此，发展 MCU 的重任不可避免地落在电气、电子技术厂家。 3.单片机是嵌入式系统的独立发展之路，向 MCU 阶段发展的重要因素，就是寻 求应用系统在芯片上的最大化解决；因此，专用单片机的发展自然形成了 SoC 化 趋势。随着微电子技术、IC 设计、EDA 工具的发展，基于 SoC 的单片机应用系统 设计会有较大的发展。 【关键词】 ：单片机,光敏三极管，数码显示，软件， ABSTRACT Single-chip was born in the 20th century, the end of the 70s, has experienced SCM, MCU, SoC th

3、ree stages. 1.SCM that single-chip microcomputer (Single Chip Microcomputer) stage, is mainly on finding the best single-chip embedded systems form the best architecture. “Innovation model“ to be successful, laid the SCM with the general-purpose computers, a completely different path of development.

4、 At creating embedded systems on an independent path of development, Intel Corporation credit. 2.MCU microcontroller (Micro Controller Unit) stage, the main direction of technology development are: expanding to meet the embedded applications, the target system requirements for the various peripheral

5、 circuits and interface circuits, to highlight the target of intelligent control. It covers areas associated with the object system, therefore, the development of MCUs responsibility inevitably falls on the electrical, electronics manufacturers. From this perspective, Intel gradually fade out MCU de

6、velopment also has its objective factors. 3. Singlechip are independent embedded systems development, to the MCU an 毕业论文 important factor in the development stage, is seeking applications on the chip to maximize the resolution; Therefore, the development of dedicated single-chip SoC formed a natural trend. As microelectronic technology, IC design, EDA tools development, microcontroller-based SoC design application systems will have greater development. 【KEYWORD】Single-chip,phototransistor