研究usb总线技术在电脑外设接口中的应用以及实现USB总线接口的芯片控制器。
The application of USB technology for the device connected to PC and the USB controller.
PDIUSBD 12芯片能够实现微控制器的并行总线到总线的接口功能，使用芯片可以实现多种类型的外设。
PDIUSBD12 may be used for implementing the interface between the parallel bus of the micro-controller and USB. With PDIUSBD12, users can implement multiple classes of USB functions.
系统的扩展和移植难度发现的PCI(外设组件接口)总线运动控制器或PC(可编程控制器)的手段。
Difficulty of system Extending and transplant are found by means of PCI (Peripheral Component Interface) bus motion controller or PC (Programmable controller).
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