The part of execution in which an operand or instruction is read from main storage and written into a control unit or arithmetic unit register.
执行过程中的一个阶段所需的时间，在此期间，计算机从主存储器中取出指令或操作数，并将其存入控制器或运算器的寄存器中。
ARM chip is chosen as the master chip of main control unit, main control unit includes data storage circuit and key and LCD display interface circuit besides.
主控单元的主控芯片选用了ARM芯片，并配以数据存储电路、按键和液晶显示接口电路。
ARM chip is chosen as the master chip of main control unit, main control unit includes data storage circuit and key and LCD display interface circuit besides.
主控单元的主控芯片选用了ARM芯片，并配以数据存储电路、按键和液晶显示接口电路。
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