目 录
1 绪论............................................................................................................................1
1.1 LED 电子迎宾屏概述 .....................................................................................1
1.2 LED 电子迎宾屏的分类 .................................................................................1
1.2.1 按颜色分类..........................................................................................1
1.2.2 按使用场合分类..................................................................................1
1.2.3 按发光点直径分类..............................................................................2
1.3 LED 迎宾屏的应用 .........................................................................................2
1.4 LED 迎宾屏的发展趋势 .................................................................................3
2 总体方案分析与设计................................................................................................5
2.1 点阵模块结构.................................................................................................5
2.2 显示单元的考虑.............................................................................................5
2.3 动态显示原理.................................................................................................6
2.4 滚屏的实现.....................................................................................................7
2.5 微控制器的考虑.............................................................................................8
2.6 总体电路结构及工作原理.............................................................................8
2.6.1 硬件电路框图......................................................................................8
2.6.2 工作原理..............................................................................................9
3 系统硬件电路设计..................................................................................................10
3.1 单片机控制系统的电路设计.......................................................................10
3.1.1 单片机机选型....................................................................................10
3.1.2 复位电路............................................................................................11
3.1.3 晶振电路............................................................................................11
3.1.4 AT89S52 在电子迎宾屏应用中的优越性 ........................................12
3.1.5 单片机系统电路设计........................................................................12
3.2 时钟与单片机的接口设计...........................................................................13
3.2.1 时钟芯片的选型................................................................................13
3.2.2 时钟芯片的引脚排列及操作时序....................................................13
3.2.3 时钟芯片与单片机的接口设计........................................................16
