说明：  ATmega128L单片机 数据手册 ATmega128L微控制器，它是采用低功耗COMS工艺生产的基于RISC结构的8位微控制器，是目前AVR系列中功能最强大的单片机。AVR核将32个工作寄存器和丰富的指令集联结在一起，所有的工作寄存器都与ALU直接相连，实现了在一个时钟周期内执行单条指令的同时访问两个独立寄存器的操作，具有良好的性价比。
(ATmega128L SCM manual data ATmega128L microcontrollers, it is using low-power CMOS technology, the RISC-based structure of the 8-bit microcontroller. AVR is the series most powerful MCU. AVR nuclear work will be 32 registers and rich instruction set connected, all the registers are directly connected with ALU, to achieve the implementation of sorts in a single instruction at the same time to visit two independent register operation, good value.)