说明：  单片机电子时钟键盘设定DS1302参数 本作品采用Atmel公司的AT89S52单片机以及DS1302时钟芯片，其中AT89S52单片机用12M晶振驱动；DS1302时钟芯片用32.768K晶振驱动；以C语言程序设计为基础，设计一个用1602液晶片显示年、月、日、时、分、秒、星期的时钟。用键盘来设置DS1302的参数，可以通过键盘修改时间、星期、日期，也可以通过单片机复位键把时间、日期复位到原来的。
(Single-chip electronic keyboard clock DS1302 parameter settings used in this work Atmel Corporation AT89S52 Singlechip and DS1302 clock chip, which AT89S52 Single-chip crystal oscillator with 12M drive DS1302 clock chip used 32.768K crystal driver to C Language Programming design is based on the design of a liquid crystal film with 1602 year, month, day, hour, minute, second, week clock. DS1302 using the keyboard to set the parameters, can be modified through the keyboard, week, date, single-chip microcomputer can also be key to reset the time, date reset to the original.)