C8051系列的外部中断程序，程序时简单的，但都是基本的应用，程序解释的很清楚，非常适合那些刚刚学习C8051单片机的人,学习它之后，你就会了解C8051中外部中断的原理和怎么去编程了。-C8051 series of external interrupt program, the program simple, but they are the basic application, the program explained very clearly, very suitable for th