PICI6F877实现7单片机最小操作系统 其主要功能模块有模拟信号放大单元．AD采样单元。数据存储区单元．液晶显示单元．键盘控制单元．声音提示与报警单元．串行通信单元．的钟单元及汉字库存储单元等-7 to achieve the smallest single-chip PICI6F877 operating system whose main function modules have analog signal amplification unit. AD sampling unit. Data storage area unit. Liquid crystal display unit. Keyboard control unit. Voice prompts and alarm unit. Serial communication modules. Bell汉字库units and storage units, etc.