论文中的控制单元是以ATMEL公司的AT89C52微控制器为核心，显示单元采用LED数码管，实现时间的显示。

在软件上，采用keil c51软件系统，控制单元采用C语言编程；另外，从硬件和软件上采取了多种措施提高系统的可靠性。

-Paper is based on the control unit ATMEL Corporation AT89C52 microcontroller as the core, indicating the use of LED digital control unit to realize the display of the time. In terms of software, using keil c51 software system, the control unit using C language programming　In addition, from the hardware and software to take a variety of measures to improve system reliability.