基于51单片机的bc7281键盘扫描 LED显示的设计及程序-Based on 51 single-chip the BC7281 keyboard scan LED display design and procedures

比较好用的两种数码管键盘管理芯片，BC7281和BC7276，与单片机接口方便，编程简单。-Relatively easy to use two digital tube keyboard management chip, BC7281 and BC7276, and the microcontroller interface, simple programming.