AVR单片机教程，实例程序，并附有电路图，AVR片内集成多种频率的RC振荡器、上电自动复位、看门狗、启动延时等功能，外围电路更加简单，系统更加稳定可靠(AVR microcontroller tutorial, example program, and circuit diagram, AVR chip integrates multiple frequency RC oscillator, power on auto reset, watchdog, startup delay and other functions. The peripheral circuit is more simple, and the system is more stable and reliable.)