51单片机外部中断例程，包含内容有:

1. EXT_C.rar, 给初学者(带中文注释的C51语言例程), 利用外部中断实现LED灯的简单控制。

2. EXT_A.rar, 给初学者(带中文注释的51汇编语言例程), 利用外部中断实现LED灯的简单控制。-51 MCU external interrupt routines, including content: 1. EXT_C.rar, for beginners (with Chinese comments C51 language routine), using the external interrupt control LED lights briefly. 2. EXT_A.rar, for beginners (with English notes of 51 assembly language routine), using the external interrupt control LED lights briefly.