"经典设计：基于51_52单片机的电子万年历应用技术"

With the rapid development of single-chip microcomputer applications technology, single-chip microcomputers have become indispensable in various aspects of our lives. From missile navigation devices to the control of various instruments on aircraft, from computer network communication and data transmission to real-time control and data processing in industrial automation processes, as well as the widespread use of various intelligent IC cards and electronic pets in our daily lives, all of these applications rely on single-chip microcomputers. A single-chip microcomputer is a microcontroller that integrates CPU, RAM, ROM, timing, counting, and various interfaces into one. It is small in size, low in cost, powerful in functionality, and widely used in intelligent industries and industrial automation. Among all single-chip microcomputers, the 51 series single-chip microcomputer is the most typical and representative one. Through studying and applying the 51 series single-chip microcomputer in this graduation project, the goal is to develop the ability to learn, design, and develop software and hardware. This thesis focuses on the design of an electronic clock that can achieve the function of perpetual calendar based on a single-chip microcomputer, aiming to learn and understand the application of single-chip microcomputer instructions in various aspects. The system is composed of the main controller AT89C51, the clock circuit DS1302, the display circuit, the keypad circuit, and the reset circuit, which can display clock and calendar functions, and show hours, minutes, and seconds. Keywords: single-chip microcomputer, lunar calendar query, perpetual calendar.