LED显示驱动器MAX7219的特性本文简述串行LED显示驱动器MAX7219的特性，介绍MAX7219与MCS51单片机的两种接口方式： 串行口驱动MAX7219和I／O 口模拟三线协议驱动MAX7219，并分别给出相应的C51程序的编程实现-MAX7219 LED display driver This paper describes the characteristics of serial LED display driver MAX7219 features introduced tw

基于单片机C51语言编写计算器 能够在通过单片机矩阵键盘实现几位数的加减乘除。-Based Microcontroller C51 language Calculator by SCM matrix keyboard to achieve several of the number of addition and subtraction, multiplication and division.