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。
Through using 16-bit freescale MCU embedded CAN controller as master chip in each node, it achieved the design of hardware circuit, so realized CAN physical layer and CAN data link layer.
各个节点设计上采用内置CAN模块的飞思卡尔16位单片机作为主控芯片来搭建硬件电路，以实现CAN总线的物理层和数据链路层。
Based on the object-orient analysis of CNC system, the paper proposes a design idea of master-slave CNC system, which builds with PC as upper chip and motion controller with DSP as lower chip.
本文在对CNC系统进行面向对象分析的基础上，建立了以PC机作为上位机，DSP运动控制器作为下位机的主从式数控铣床系统。
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