摘要：本文介绍了基于ATmega8的整点报时电子时钟设计系统。该系统实现了采用6位一体的七段数码管上显示时钟，通过按键开关调整对时以及整点报时三大功能。硬件电路主要包括：键盘电路、显示电路、复位电路、扬声器以及晶振。程序部分包括：主程序、时间调整子程序、显示子程序、整点报时子程序、中断程序。本系统通过硬件电路设计、软件系统设计、系统调试、仿真等四个步骤实现了上述功能。-Abstract: This article describes the whole point of time based on the ATmega8 switch to adjust for time, there are the whole point timekeeping devices. Hardware circuit includes: keyboard circuit, display circuit, reset circuit, speakers, and crystal. Program components include: the main program, time adjustment routines, display subroutine, the whole point timekeeping subroutines, interrupt routines. The system through the hardware circuit design, software system design, system debugging, simulation and other four steps to achieve the above functions.