本文介绍的ＲＴＣ模块主要是针对公共场所日历实时钟（大屏幕）ＬＥＤ显示而设计，可带安全日参数的新产品。它的显示接口特色和ＳＰＩ通迅串口使其应用更为广泛，能方便地应用于多屏同步时钟、世界时钟、正计时／倒计时安全日时钟及工业测控领域。 This article describes the RTC module is mainly for public places calendar real-time clock (large screen) LED display design, with safety parameters of new products. Its display interface features and SPI communication serial port to make it more widely used, can be easily applied to multi-screen sync clock, the world clock, timekeeping / countdown safety clocks and industrial monitoring and control fields.