...进 入开机步骤，初始(Initialize)所有系统要件(Aspects of System)，从 CPU、暂存器(Register)、 装置控制器(Device Controllers)、到主记忆体(Main Memory)，继而作业系统(Operating System)，开启电脑备便使用。 4-18 作业系统概论 4-12 习题(Exercises) 1.
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There are generally two modes of USB technology could be used in embedded systems, one is the USB device mode using as USB Devices and the other is USB host mode using as USB Host Controllers.
USB技术在嵌入式系统中有两种主要的应用方式：即作为USB总线设备的USB设备方式和作为USB主控制器的嵌入式USB主机。
Its control device is comprised of processing tool, energy sensor, temp. sensor, addition apparatus, regulating valve, low temp. liquid generator, and forward feed and feedback controllers.
其控制装置由加工工具、能量传感器、温度传感器、加法器、调节阀、低温液体发生器以及前馈控制器和反馈控制器组成。
USB Device Tree Viewer is capable of querying the registry and enumerating host controllers, root hubs, as well as the attached devices to each port.
USB设备树查看器能够查询注册表，并列举主机控制器，集线器根，以及连接设备每个端口。
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