1基于单片机的简易数字电压表的设计目录内容摘要...................................................................2第1章数字电压表简介.....................................................31.1数字电压表的介绍..................................................31.2数字电压表的基本结构及工作原理..................................31.3数字电压表的发展趋势.............................................3第2章单片机的概述........................................................42.1单片机简介.........................................................42.2单片机的特点......................................................52.3单片机的应用......................................................5第3章MCS-51单片机的结构................................................63.1MCS-51单片机的内部结构...........................................63.1.1内部结构概述.................................................63.1.2CPU结构.....................................................63.1.3存储器和特殊功能寄存器.....................................73.2P0-P3口结构......................................................73.3时钟电路和复位电路?????.....................................83.3.1时钟电路.....................................................83.3.2单片机的复位状态??????................................8第4章硬件电路的设计及原理图............................................94.1A/D接口技术........................................................94.2LED数码管显示器.................................................114.2.1LED数码显示器结构..........................................114.2.2LED数码管的原理与接口..................................124.3AT89S52芯片的简介..............................................124.4硬件系统的整体框图???........................................144.5总原理图.........................................................15第5章软件编程.........................................................16后记????????????????????????????????????18参考文献..................................................................18附录?????.............................................................192内容摘要本报告介绍了基于AT89S52单片机为核心的、以AD0809数模转换芯片采样、以1602液