毕业论文设计 单片机电子时钟.doc
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毕业论文设计 单片机电子时钟,摘要：单片计算机既单片微型计算机。由ram,rom,cup构成，定时，计数和多种接口与一体的微型控制器。他体积小，成本低，功能强，广泛应用于智能产业和工业自动化上。而51 系列单片机是各单片机中最为典型和最有代表性的一种。这次毕业设计通过对它的学习，应用，从而达到学习，设计的能力。本设计主要涉及了一个基于at89c51...
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摘要：单片计算机既单片微型计算机。由RAM,ROM,CUP构成，定时，计数和多种接口与一体的微型控制器。他体积小，成本低，功能强，广泛应用于智能产业和工业自动化上。而51 系列单片机是各单片机中最为典型和最有代表性的一种。这次毕业设计通过对它的学习，应用，从而达到学习，设计的能力。
本设计主要涉及了一个基于AT89C51单片机的电子时钟。并在数码管上显示相应的时间。并通过一个控制键用来实现时间的调节和是否进入省电模式的转换。
单片机自20世纪70年代问世以来，以其极高的性能价格比，受到人们的重视和关注，应用很广、发展很快。单片机体积小、重量轻、抗干扰能力强、环境要求不高、价格低廉、可靠性高、灵活性好、开发较为容易。由于具有上述优点，在我国，单片机已广泛地应用在工业自动化控制、自动检测、智能仪器仪表、家用电器、电力电子、机电一体化设备等各个方面，而51单片机是各单片机中最为典型和最有代表性的一种。这次毕业设计通过对它的学习、应用，以AT89S51芯片为核心，辅以必要的电路，设计了一个简易的电子时钟，它由4.5V直流电源供电，通过数码管能够准确显示时间，调整时间，从而到达学习、设计、开发软、硬件的能力。
关键词：单片机、电子时钟
ABSTRACT:A monolithic computer is single chip microcomputer. By RAM, ROM, CUP, timing, counting and multiple interfaces and the integration of the micro controller. He has the advantages of small volume, low cost, strong function, widely used in smart industries, and industrial automation. And 51 Series SCM is the most typical and the most representative one. The graduation design through the study, application, to achieve the study, design ability.
This design mainly involves a AT89C51 microcontroller based on the electronic clock. And in digital tube display the corresponding time. And through a control key is used to realize the time regulated and whether to enter power-saving mode conversion.
Since the 1970 s chip since the advent, with its high cost performance and attention by people and attention, it is widely used and fast development. SCM small volume, light weight, strong anti-jamming capability, environmental demand is not high, low cost, high reliability, flexibility is good, development more easy. Because of the above features, in our country, the microcontroller is widely used in industrial automation control, automatic detection, intelligent instrument and apparatus, household appliances, power electronics, mechanical and electrical equipment, and other aspects, and 51 SCM is the most typical chip and most representative one. The graduation design through to its study, application to AT89S51 chips as the core, with the necessary circuit, design of a simple electronic clock, it by 4.5 V dc power supply, through the digital tube can show time, adjust the time, thus to learning, the design, the development of software and hardware in the ability.
Key word: Single-chip microcomputer AT89S
目 录
前 言 1
第一章 原理 3
第二章 方案 3
第三章 系统设计 4
3.1 总体设计 4
3.1.1系统说明 4
3.2 模块设计 4
3.2.1电源部分 4
3.2.2复位电路 5
3.3.3程序下载接口 6
3.3.4位选部分 6
3.3.5数码管的连接电路 6
3.3.6控制部分 8
第四章 原理图.....................................................................................................................13
第五章 软件设计................................................................................................................ 14
5.1 程序流程图 14
5.2 源程序 15
第六章 总结.........................................................................................................................21
参考文献（References）： 23
本设计主要涉及了一个基于AT89C51单片机的电子时钟。并在数码管上显示相应的时间。并通过一个控制键用来实现时间的调节和是否进入省电模式的转换。
单片机自20世纪70年代问世以来，以其极高的性能价格比，受到人们的重视和关注，应用很广、发展很快。单片机体积小、重量轻、抗干扰能力强、环境要求不高、价格低廉、可靠性高、灵活性好、开发较为容易。由于具有上述优点，在我国，单片机已广泛地应用在工业自动化控制、自动检测、智能仪器仪表、家用电器、电力电子、机电一体化设备等各个方面，而51单片机是各单片机中最为典型和最有代表性的一种。这次毕业设计通过对它的学习、应用，以AT89S51芯片为核心，辅以必要的电路，设计了一个简易的电子时钟，它由4.5V直流电源供电，通过数码管能够准确显示时间，调整时间，从而到达学习、设计、开发软、硬件的能力。
关键词：单片机、电子时钟
ABSTRACT:A monolithic computer is single chip microcomputer. By RAM, ROM, CUP, timing, counting and multiple interfaces and the integration of the micro controller. He has the advantages of small volume, low cost, strong function, widely used in smart industries, and industrial automation. And 51 Series SCM is the most typical and the most representative one. The graduation design through the study, application, to achieve the study, design ability.
This design mainly involves a AT89C51 microcontroller based on the electronic clock. And in digital tube display the corresponding time. And through a control key is used to realize the time regulated and whether to enter power-saving mode conversion.
Since the 1970 s chip since the advent, with its high cost performance and attention by people and attention, it is widely used and fast development. SCM small volume, light weight, strong anti-jamming capability, environmental demand is not high, low cost, high reliability, flexibility is good, development more easy. Because of the above features, in our country, the microcontroller is widely used in industrial automation control, automatic detection, intelligent instrument and apparatus, household appliances, power electronics, mechanical and electrical equipment, and other aspects, and 51 SCM is the most typical chip and most representative one. The graduation design through to its study, application to AT89S51 chips as the core, with the necessary circuit, design of a simple electronic clock, it by 4.5 V dc power supply, through the digital tube can show time, adjust the time, thus to learning, the design, the development of software and hardware in the ability.
Key word: Single-chip microcomputer AT89S
目 录
前 言 1
第一章 原理 3
第二章 方案 3
第三章 系统设计 4
3.1 总体设计 4
3.1.1系统说明 4
3.2 模块设计 4
3.2.1电源部分 4
3.2.2复位电路 5
3.3.3程序下载接口 6
3.3.4位选部分 6
3.3.5数码管的连接电路 6
3.3.6控制部分 8
第四章 原理图.....................................................................................................................13
第五章 软件设计................................................................................................................ 14
5.1 程序流程图 14
5.2 源程序 15
第六章 总结.........................................................................................................................21
参考文献（References）： 23
