单片机键盘可调时钟显示

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1、数字时钟陕西理工学院电气工程系目录前言··································································································2任务书······················································································································3·1.方案选择1.1.键盘设计····································

2、········································································41.2.门电路设计·········································································································51.3.显示电路·······························································································

3、··············52.硬件电路及参考程序2.1基于proteus仿真的硬件电路···········································································72.2参考程序·································································································作者：第26页共26页数字时钟陕西理工学院电气工程系············83试验调试3.1硬件电路的连接············

4、···················································································143.2.硬件电路的调试································································································144试验结论····························································································

5、···············145心得体会···········································································································156参考文献及元器件引脚图6.1参考文献···········································································································206.2元器件引脚图·······················

6、·············································································216.3AT89C51的若干时序·······················································································236.4作者：第26页共26页数字时钟陕西理工学院电气工程系硬件电路图··········································································

7、·······························246.5元器件清单·········································································································26前言随着时代科技的迅猛发展，微电子学和计算机等现代电子技术的成就给传统的电子测量与仪器带来了巨大的冲击和革命性的影响。常规的测试仪器仪表和控制装置被更先进的智能仪器所取代，使得传统的电子测量仪器在远离、功能、精度