电子钟设计报告

电子钟设计报告

《电子钟设计报告》

别: 自动化系

专业班级: 自动化0801

学生姓名: 陈金元

指导教师: 李川香

2010年10月

华中科技大学武昌分校

目录

摘要........................................................ ............. .. (2)

1电子钟的总体方案设计........................... .......................................... ........................3 1.1 设计要求................................................ ..................... .................................................3 1.2 设计方案............................................... ...................... .................................................3 1.3 各模块的功能............................................ ......................... .........................................3 1.4电子钟的组成框图.................................... ................................. ..................................4 2单元模块电路设计与仿

真...................... ............................................... ........................4 2.1 秒模块的设计............................................ ......................... .........................................4 2.2 分模块的设计............................................. ........................ .........................................6 2.3 小时模块的设计....................................... .............................. .....................................6 2.4八进制模块的设计.................................... ................................. ..................................8 2.5译码显示电路模块的设计...................................................................... ......................9 2.6扫描显示模块的设计................................. .................................... ..............................10 2.7整点报时模块的设计............................. ........................................ ..............................11 3 电子钟的顶层设计................................ ..................................... ....................................12 3.1 电子钟的逻辑原理图.................. ... ............................................... .............................12 3.2 电子钟的主程序....................................................... .............. .....................................13 3.3 电子钟的引脚锁定............................ ......................................... .................................16 4 硬件支

持................................ ......... ........................... ...................................................16 4.1 系统供电.................. ... .................. ........................... ..................................................16 4.2独立I/O口配置....................................................... .............. ...................................17 4.3 LED指示灯............................ .............. .......................... . ............................................17 4.4无源蜂鸣器......................... ...... ........................... ......... ..........................................18 4.5矩阵键

盘.. ...................... ........................... ................ .. ........................... .................18 4.6数码管外部电路......................... ......... ........................... ...... ........................................19 5编程下载与调试..................................... ........................... .... ............................................19 心得体会............................ ...................... .................. ......... .. (20)

参考文献...................................................... ............... .. (21)

致谢............................................................. ........ (21)