"MCS-51系列单片机实验板：低成本高性能，功能全面实用"

Introduction The document introduces a low-cost and widely used MCS-51 series microcontroller experimental board. This experimental board has several advantages over traditional teaching boards. Firstly, it is cost-effective. Secondly, it is easy to use, requiring only a PC with an RS232 serial port to conduct experiments. Thirdly, it is equipped with various commonly used interfaces such as memory, LED digital display, keyboard human-machine interface, parallel interface, serial interface, and more. The experimental board caters to both student microcontroller experiments and graduation projects, allowing for simple experiments like running lights and keyboard experiments. With the addition of some peripheral circuits, it can be used for practical applications. The document provides details on the modular hardware structure, simple human-machine interaction functions, system components, hardware functional modules, and some demonstration programs of the experimental board. The experimental board offers advantages such as reducing design costs, shortening development cycles, enriching student knowledge, and improving design skills. Keywords: microcontroller, experimental board, running lights, LED digital display, keyboard Abstract This document introduces a low-cost and widely used MCS-51 microcontroller experimental board, which has several advantages compared to traditional teaching boards. It is cost-effective, easy to use, and equipped with various interfaces for different experiments. The experimental board is suitable for student experiments and graduation projects, providing a platform for both learning and practical applications. It offers a modular hardware structure, simple human-machine interaction functions, and detailed information on system components. The experimental board is beneficial for reducing design costs, shortening development cycles, enriching student knowledge, and enhancing design skills.