"AT89C51单片机驱动64×16 LED点阵广告牌设计"

Based on the document "Design of LED Matrix Advertising Board Based on MCU 47191", this project utilizes the AT89C51 series high-speed single-chip microcontroller as the main control module, along with a simple peripheral circuit to drive a 64×16 LED display screen. The powerful functions of the AT89C51 series high-speed single-chip microcontroller make it easy to achieve data transmission and storage between the MCU and PC, as well as facilitating a variety of display content changes through software. LED matrix displays are widely used in hospitals, airports, banks, and other public places, indicating the practicality of this design. The LED display can simultaneously show 4 sets of 16×16 Chinese characters in dynamic scanning mode, with the ability to modify display content and effects using PC software. Character codes are stored in the MCU's unused program storage space, allowing the LED display system to store 1024 characters even when power is off. The design incorporates a GB2312 standard font library with an SPI interface, supporting the display of all Chinese and ASCII standard characters. The serial transmission method enhances the system's scalability, enabling easy cascading of multiple display units. The document elaborates on the principles of LED display, hardware circuit design, calculations, and software algorithms. Key words: dynamic display; microcontroller; dot matrix font库.