Abstract
The curriculum requirements are connected through the LCD module with the microcontroller to
display numbers (such as time), characters (such as English) and graphics, which require specialized
clock chip ----- DS1302. DS1302 is a high performance, low power, real-time clock chip with RAM, it can
on the hours, minutes and seconds for precision timing, it is the interface with the microcontroller using
synchronous serial communication, only three lines connected with it To MCS-51 microcontroller can
read and write them to read out to the LM044L time data display. Program is running, you must first set
of initial LM044L, then, through the microcontroller to get time from the DS1302 in and through LM044L
display. Meanwhile, the cycle assignment, so LCD dynamic display the current time.
Keywords: AT89C51, DS1302, LM044L display
摘要
此次课程设计的要求是通过 LCD 与单片机的连接模块能够显示数字（如时间）、字符（如
英文）和图形等，这就需要专门的时钟芯片-----DS1302。 DS1302 是一种高性能、低功耗、
带 RAM 的实时时钟芯片，它能够对时，分，秒进行精确计时，它与单片机的接口使用同步串
行通信，仅用 3 条线与之相连接，就可以实现 MCS-51 单片机对其进行读写操作，把读出的时
间数据送到 LCD1602 上显示。程序运行时，必须先对 LM044L 进行初始设置，然后，通过单片
机从 DS1302 中获取时间并通过 LCD1602 显示。同时，进行循环赋值，使 LCD 动态显示当前的
时间。
关键字：AT89C51、DS1302，LCD1602 显示器
