目录
一、 总体设计.......................................................................................................................5
1. 单片机选型...................................................................................................................5
2. 按键扫描.......................................................................................................................5
3. 1620LCD 显示..............................................................................................................5
二、 主要元件介绍...............................................................................................................6
1. AT89S51 概述 ..............................................................................................................6
1.1 AT89S51 主要特征 ................................................................................................6
1.2 管脚说明................................................................................................................7
1.3
本设计中的应用
....................................................................................................8
2. 1620LCD.....................................................................................................................11
2.1 1620LCD 概述......................................................................................................11
2.2 1620LCD 控制指令..............................................................................................13
三、 基于 PROTEUS 的硬件电路设计.............................................................................15
1. PROTEUS 软件相关..................................................................................................15
2. 电路组成.....................................................................................................................15
2.1 复位电路.........................................................................................................15
2.2 时钟电路.........................................................................................................16
2.3 1620LCD 显示电路........................................................................................16
2.4 按键扫描电路.................................................................................................17
2.5 蜂鸣器和发光二级管控制电路.....................................................................17
四、硬件配置.............................................................................................................................18
1. 按键扫描程序.............................................................................................................18
2. 1620LCD 显示程序....................................................................................................20
五、 电路仿真.....................................................................................................................22
六、 总结.............................................................................................................................25
七、 附件.............................................................................................................................26
1. 电路原理图.................................................................................................................26
2. 源程序.........................................................................................................................26
