单片机多功能电子钟毕业设计论文机械毕业设计论文.doc

XX大学 本科生毕业设计说明书（毕业论文） 题 目：单片机多功能电子钟的设计 —硬件设计 学生姓名：昊天 学 号专 业：电子信息工程 班 级：010203 指导教师：刘华 摘 要 ：；；The Design with Investigation of the Multi-function Electron Clock －The Design of the Hardware Abstract The electronic clock mainly uses the electronic technology make the clock computerization, the digitization.Compared with the traditional mechanical bell, it has the clock precision, intuitive display, the advantages of no mechanical transmission device, which is widely used.In addition, living and industrial and agricultural production, people on the clocks function has also put forward many demands: alarm clock, calendar, temperature display, so electronic clock need multi-function. According to the different requirements of the people, the design for the main implementing a clock/calendar can be displayed normal, collecting personal ambient temperature, with the timing alarm of the multi-function electronic clock Through access to a lot of information.Comparing and analysising the development technology of the electron clock, the design determines to use the MCU technology to realize the multi-functional electron clock. This design application AT89C51 as a core chips, 7 LED digital displaying, using DS1302 real-time clock chip to complete the basic function of the clock/calendar. At the same time the design use of DS18B20 temperature sensors to collect the environmental temperature. The method has the advantage of being simple circuit, reliable performance, good real-time, high precision of the time and temperature, cost-effective to develop more easily. Key words: Electronic clock; Multi-function; DS1302; AT89C51; Temperature pickup 目 录 摘 要 I Abstract II 第一章 引 言 1 1.1 多功能电子时钟研究的背景和意义 1 1.2 电子时钟的功能 2 第二章 电子时钟设计方案分析 3 2.1 NE555时基电路设计方案 3 2.2 单片机设计方案 4 第三章 基于单片机的电子时钟硬件设计 5 3.1 主要IC芯片选择 5 3.1.1 微处理器选择 5 常用时钟日历芯片比较 6 DS1302简介 6 DS1302引脚说明 7 DS1302的控制字和读写时序说明 7 DS1302的片内寄存器 9 3.1.2 环境温度传感器选择 10 常用温度传感器比较 10 DS18B20简介 11 DS18B20内部结构 11 3.