介绍了AT89C52 单片机的特性,以及跨越2000 年的时钟芯片DS12887 和字符型液晶显示模块HD44780 的应用,叙述了通风机监视仪的硬件和软件设计,实践证明该仪器的可行性。 关键词:通风机监视仪单片机时钟芯片 Abstract : Characteristic of Microcomputer AT89C52 ,applications of clock chip DS12887 of cross over 2000 years and character type liquid crystal display module HD44780 are introduced. Having narrated the hardware and the software design of the ventilator monitor. Practice has proved the feasibility of this instrument . Keywords: the ventilator monitor microcomputer clock chip