目 录摘要...............................................................................................................................................................1英文摘要......................................................................................................................................................2引言...............................................................................................................................................................31 概述...........................................................................................................................................................42 系统硬件设计.........................................................................................................................................42.1 硬件组成及工作原理................................................................................................................42.2 单片机选型..................................................................................................................................52.3 时钟电路.......................................................................................................................................52.4 复位电路.......................................................................................................................................62.5 密码存储电路.............................................................................................................................72.6 矩阵式键盘电路设计................................................................................................................72.7 报警电路.......................................................................................................................................82.8 显示电路.......................................................................................................................................83 系统软件方案...................
