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目 录
前 言...........................................................................................................................................3
1 系统总体方案设计.................................................................................................................3
1.1 设计内容.......................................................................................................................3
1。2 设计要求....................................................................................................................4
1。3 设计思路及描述........................................................................................................4
2 系统硬件电路的设计.............................................................................................................5
2。1 AT89C51 单片机简介................................................................................................5
2.1。1 AT89C51 提供的标准功能 ..........................................................................5
2。1。2 AT89C51 引脚功能 ...................................................................................5
2.2 晶振与复位电路...........................................................................................................8
2。3 显示电路....................................................................................................................9
2。3 按键..........................................................................................................................11
3 系统软件结构设计...............................................................................................................12
3。1 主程序设计..............................................................................................................12
3。2 定时器 T0 中断服务程序 .......................................................................................12
结 论.......................................................................................................................................13
参考文献...................................................................................................................................13
谢 辞.........................................................................................................................................14
附 录.......................................................................................................................................15