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。
This article proposes the operating principle and the program block-diagram of the automatic switching control to the main circuit-breaker on board of each powered unit of the train at proper time.
本文介绍了该装置对列车各车组适时进行主断路器自动分合闸控制的工作原理及程序框图。
The hardware circuit comprises three parts: inverter, detecting circuit and main control unit.
硬件分为三大部分，逆变器、检测电路和主控单元。
Hardware circuit design includes a central processing unit circuit, clock circuit, assembly language software to achieve, including the main program, subroutine, such as set-up time software modules.
硬件电路设计主要包括中央处理单元电路、时钟电路、软件用汇编语言来实现，主要包括主程序、时光设置子程序等软件模块。
Hardware circuit design includes a central processing unit circuit, clock circuit, assembly language software to achieve, including the main program, subroutine, such as set-up time software modules.
硬件电路设计主要包括中央处理单元电路、时钟电路、软件用汇编语言来实现，主要包括主程序、时光设置子程序等软件模块。
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