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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