基于DS12C887的实时日历时钟的设计

本系统采用单片机作为数字钟的核心控制器,读取时钟芯片的值,并通过显示器显示出来,而且可以通过按键电路给单片机执行信号,给时钟芯片赋初值。采用STC89C51作为主控单片机,时钟模块选用DS12C887作为时钟芯片,显示模块选用LCD1602,设置部分选用按键电路。其功能是在51单片机系统中设置、获取、记录实时的日历时钟信息并通过数码管显示,选用日历时钟芯片DS12C887作为实时时钟芯片,为系统提供详细的时间信息,次款芯片内部有锂电池,可以带掉电的情况下保存10年以上。

DS12C887-based Design of Real -time Calendar Clock

This system uses the microcontroller as the core controller ,digital clock ,read clock chip value ,and that the circuit to the microcontroller through the implementation of key signal ,the in-itial value assigned to the clock chip .Using STC89C52 microcontroller as a master clock module select-ed as a clock chip DS12C887 ,display module selection LCD1602 .The design feature is the 51 SCM system Shezhi ,acquisition ,real-time recording ofcalendar clock information and ,through digital con-trol ,use the calendar clock chip DS12C887 as a real-time clock chip ,the time for the system to pro-vide detailed information ,times the chip internal lithium battery ,can be the case with a power -down save more than 10 years .