简易数字电压表的设计

目 录
摘要-------------------------------------------------------------------------------------------------------------------------- 2
Abstract------------------------------------------------------------------------------------------------------------------ 3
第一章 绪论-------------------------------------------------------------------------------------------------------------- 4
第二章 系统硬件电路设计----------------------------------------------------------------------------------------- 5
第三章 单片机介绍--------------------------------------------------------------------------------------------------- 6
3.1 时钟电路-------------------------------------------------------------------------------------------------------------- 6
3.2 复位电路-------------------------------------------------------------------------------------------------------------- 6
3..3 单片机芯片图------------------------------------------------------------------------------------------------------- 7
第四章 模数转换ADC0809---------------------------------------------------------------------------------------- 9
4.1 ADC0809的内部逻辑结构------------------------------------------------------------------------------------------ 9
4.2 ADC0809引脚结构图------------------------------------------------------------------------------------------------ 10
4.3 ADC0809主要信号引脚的功能如下------------------------------------------------------------------------------ 10
4.4 ADC0809对输入模拟量要求--------------------------------------------------------------------------------------- 10
第五章 显示电路（液晶LCD1602）---------------------------------------------------------------------------- 12
第六章 系统程序的设计-------------------------------------------------------------------------------------------- 13
6.1 主程序----------------------------------------------------------------------------------------------------------------- 13
6.2 A/D转换子程序------------------------------------------------------------------------------------------------------ 13
6.3系统整体硬件电路图----------------------------------------------------------------------------------------------- 14
6.4 总程序----------------------------------------------------------------------------------------------------------------- 14
6.5系统的调试------------------------------------------------------------------------------------------------------------ 21
附录-图-------------------------------------------------------------------------------------------------------------------- 22
总结与体会--------------------------------------------------------------------------------------------------------------- 24
参考文献------------------------------------------------------------------------------------------------------------------ 25
致谢------------------------------------------------------------------------------------------------------------------------- 26