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2. USB 3.0 - Wikipedia

   en.wikipedia.org/wiki/USB_3.0

   USB 3.0 port provided by an ExpressCard-to-USB 3.0 adapter may be connected to a separately-powered USB 3.0 hub, with external devices connected to that USB 3.0 hub. On the motherboards of desktop PCs which have PCI Express (PCIe) slots (or the older PCI standard), USB 3.0 support can be added as a PCI Express expansion card.

3. USB - Wikipedia

   en.wikipedia.org/wiki/USB

   USB was designed to standardize the connection of peripherals to personal computers, both to exchange data and to supply electric power. It has largely replaced interfaces such as serial ports and parallel ports and has become commonplace on various devices.

4. USB communications - Wikipedia

   en.wikipedia.org/wiki/USB_communications

   The idle line state is when the device is connected to the host with a pull-up on either D+ (for full speed USB 1.x) or D− (for low speed USB 1.x), with transmitter output on both host and device is set to high impedance (hi-Z) (disconnected output). A USB device pulls one of the data lines high with a 1.5 kΩ resistor.

5. Stay Connected With Your Older Devices With These Best USB-C Hubs

   www.aol.com/lifestyle/stay-connected-older...

   USB-C Hub, 565 11-in-1. With its brushed aluminum casing and robust braided cable, the Anker 565 feels like quality. It can connect almost everything to your computer, save for the kitchen sink.

6. USB hardware - Wikipedia

   en.wikipedia.org/wiki/USB_hardware

   Such devices can use an external power supply, which is allowed by the standard, or use a dual-input USB cable, one input of which is for power and data transfer, the other solely for power, which makes the device a non-standard USB device. Some USB ports and external hubs can, in practice, supply more power to USB devices than required by the ...

7. Extensible Host Controller Interface - Wikipedia

   en.wikipedia.org/wiki/Extensible_Host_Controller...

   The xHCI reduces the need for periodic device polling by allowing a USB 3.0 or later device to notify the host controller when it has data available to read, and moves the management of polling USB 2.0 and 1.1 devices that use interrupt transactions from the CPU-driven USB driver to the USB host controller.