為使數(shù)字鐘從電路設計、性能分析到設計出PCB版(即印制電路版)圖的整個過程能夠在計算機上自動處理完成，從而縮短設計周期、提高設計效率、減小設計風險。本系統(tǒng)基于EDA技術的設計方法，提出一種采用P-MOS大規(guī)模集成電路LM8560作為計數(shù)譯碼的石英數(shù)字鐘的設計方案，在Protel99SE軟件平臺下創(chuàng)建原理圖和繪制印制電路版，實現(xiàn)了基本計時顯示和設置、調整時間和鬧鐘等功能，最后組裝出一個完整的數(shù)字鐘。

　　Abstract:

　　In order to make the whole process of circuit design， function analysis and printed circuit of digital clock could operate automatically on computer， so that it will cut down the design cycle， improve the design efficiency and diminish the design risk. This paper designed a scheme of counting decoding quartz digital clock by adopting P-MOS large-scale integrated circuits LM8560 based on EDA technology.It can create schematic diagrams and draw printed circuit boards upon of Protel99SE software platform， and also realize the time setting and display， time adjustment and clock alarming function. At last， a perfect digital clock is made.