摘要在19年代的时候，飞速发展的电子技术推动了微电子技术迅猛发展并渗透进了社会的各个领域。现如今语音时钟在现实生活中运用非常广泛，它经常出现在例如火车站，机场，学校等等场合中。70364

本次设计是以学校为背景，以单片机为基础，对时钟芯片DS1302进行实时的采集，得到准确的时间信息，再以液晶屏的方式显示给使用者。并且本设计采用ISD4004语音芯片，用户可以自己录制音乐或者是提醒语句，在需要给学生做提醒时播放。

本设计采用的数字时钟精确到秒，性能比老式机械时钟更加优秀，而且本设计还可以让使用者设定事件提醒功能，在未来的时间设定提醒。数字语音时钟小巧，价格低廉，精确度高，使用方便，功能多样化广受大家好评。

毕业论文关键词：数字时钟  语音芯片  单片机

Voice Clock System based on 51 MCU

Abstract In the last century, electronic technology has been rapid development, under its impetus, the modern electronic products penetrate into all fields of society. Now the voice clock in real life, the use of very wide, it often occurs in such as the railway station, airport, school and so on occasions.

This design is based on the school as the background, based on the single-chip microcomputer, the clock chip DS1302 for real-time collection, accurate time information, and then to the LCD screen display to the user. And this design uses ISD4004 voice chip, users can record their own music or to remind the statement, in the need to remind the students to do when playing.

This design uses the digital clock accurate to second, the performance is more excellent than the old mechanical clock, and this design also lets the user to set the event reminder function, in the future time set to remind. Digital voice clock compact, low cost, high precision, easy to use, functional persity and widely praised by everyone.

Key Words:Digital clock  Voice chip  MCU

目录

摘  要 I

Abstract Ⅱ

1.绪  论 1

2. 系统的总体设计 2

2.1系统的设计要求 2

2.2系统设计总方案 2

2.3 系统设计总体框架图 5

2.4 系统设计网络框架图 5

3.系统的硬件设计 7

3.1时钟电路模块 7

3.2键盘电路模块 9

3.3液晶屏显示模块 10

3.3.1液晶屏显示电路硬件连接图 10

3.4语音打铃模块 17

3.5 麦克风滤波模块 19

3.6 喇叭及功能放大模块 21

3.7 通信模块 22

3.8 AT89S52单片机 24

3.9 系统总原理图 27

4. 系统的软件设计 30

4.1 系统主程序设计 30

4.2修改时间子程序设计 33

4.3设置闹钟子程序 33

4.4通讯子程序 34

4.5程序具体实现 36