摘 要:多功能计时计分系统是为了解决体育比赛时计分与计时准确的问题。此装置利用单片机AT89C51完成了计时和计分的功能，并且根据整理好的数字信息发送给显示装置，例如大屏幕显示。

　　　本文详细地介绍了系统硬件与软件的设计过程，采用单片机AT89C51作为本设计的控制核心，系统硬件电路由以下几个部分组成：驱动模块，显示模块，按键控制模块，蜂鸣器报警模块。主程序具有：初始化设置，比赛项目选择，键盘扫描等功能。

　　　该系统具有对篮球，手球，摔跤，拳击，柔道，网球，羽毛球等比赛过程中出现的时间，比分等数据进行快速采集记录，加工处理以及显示的功能。它具有价格低廉，性能稳定，电路简单，实时性强等特点，适合各类学校或者小型团体作为赛程计时计分。

关键词：单片机；计时器；计分器；多功能

ABSTRACT:Multi-function timing and scoring device is used to solve the problem of the scoring and timing accuracy in the sports game. This device uses single-chip microcomputer AT89C51 to finish the function of recording the time and score, and sent to the display device according to the arrangement digital information, such as large screen display. 

　　　This article introduces the designing process of the hardware and software system. This system uses single-chip microcomputer AT89C51 as the control core of the design, and the hardware circuit system is made up of the following several parts: driving module, displaying module, key controlling module, buzzer alarming module. The main program has the following functions: initialization Settings, project selection, keyboard scanning and others. 

　　　This system can be used in a lot of games such as basketball, handball, wrestling, boxing, judo, tennis, badminton and so on. During the games it can quickly collect ,  record, process and display the time and score .It has many characteristics such as low price, stable performance, simple circuit, strong real-time and others. It is suitable for all kinds of schools or small groups which can use it as the time and score recording device. 

Key words: Single Chip Microcomputer ; Timing Device; Scoring Device ; Multi-function