brief introduction： The USB controller is connected by a cable between the motherboard rear port and the case front port which is what you see with the USB port usually shown in white and blue for USB2.0 and USB3.0.USB controller host is used to control the communication between USB devices and CPU. It must be driven by the USB host controller driver to run.The support required by USB interface chips for USB communication is different, with some chips only needing access to a series of registers to store and restor

USB Controllers

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