说明：  ATmega128具备引导加载支持的用户程序自编程功能(In-System Programming by On-chipBoot Program)，它提供了一个真正的由MCU本身自动下载和更新（采用读/写同时"Read-While-Write"进行的方式）程序代码的系统程序自编程更新的机制。利用AVR的这个功能，可以实现在应用编程（IAP）以及实现系统程序的远程自动更新的应用。
(ATmega128 bootloader support with user program from the programming function (In-System Programming by On-chipBoot Program), which provides a real from the MCU to automatically download and update itself (with read/write at the same time " Read-While-Write" The way) system program code update mechanism for self-programming. Using AVR to this feature, you can achieve in the Application Programming (IAP) and the system automatically updates the remote process applications.)