说明：  Avr单片机和其他单片机一样，有自己的指令和寄存器，特定的IO口操作方法，有定时器，AD转换，串行口，PWM输出，EEPROM等。为了缩短大家学习的时间，快速的了解avr编程思路，拟定avr程序设计系列教程。我使用avr也不是很长时间，技术有限，错误再所难免，还请指出，以期改正。
(Avr Singlechip and other single-chip, as has its own instructions and registers, a specific method of operation of the IO port, has timer, AD converter, serial port, PWM output, EEPROM, etc.. U.S. in order to shorten the learning time, rapid understanding of avr programming ideas, formulation of program design avr tutorial series. I use avr is not a very long time, technology is limited by the inevitable mistakes, please also indicate with a view to correction.)