routing step meaning in English

路由选择步

The emphasis of this article is the design in the second period , which is based on the pic microchip interface , because at present embedded structure is adopted by most of medical instruments so that it can run separately without computer , hi this part the article specifically introduces the interface circuit of pic16f877 single - chip , which includes the acquisition of a / d signa ls and the serial communication between the single - chip and computer , the design of complex programmable logic device ( cpld ) and the using of hardware describe language ( vhdl ) to control the rotate speed of 4 - route stepping motors
本论文的重点是在设备的第二阶段开发，它是基于pic系列单片机接口的硬件设计，主要是针对现阶段大多数医疗设备都是采用嵌入式结构，它能够脱离计算机单独运行。在这部分详细介绍了pic16f877单片机的外围电路，包括a d信号的采集、单片机与计算机的串行通信，可编程逻辑器件cpld硬件的设计，以及用硬件描述语言vhdl编程来同时实现4路步进电机的转速控制。