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2. Device driver - Wikipedia

   en.wikipedia.org/wiki/Device_driver

   In the context of an operating system, a device driver is a computer program that operates or controls a particular type of device that is attached to a computer or automaton. [1] A driver provides a software interface to hardware devices, enabling operating systems and other computer programs to access hardware functions without needing to ...

3. List of open-source mobile phones - Wikipedia

   en.wikipedia.org/wiki/List_of_open-source_mobile...

   Generally, the phones included on this list contain copyleft software other than the Linux kernel, and minimal closed-source component drivers (see section above). Android-based devices do not appear on this list because of the heavy use of proprietary components, particularly drivers and applications. [7] [1] [8]

4. 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.

5. USB hardware - Wikipedia

   en.wikipedia.org/wiki/USB_hardware

   To allow for voltage drops, the voltage at the host port, hub port, and device are specified to be at least 4.75 V, 4.4 V, and 4.35 V respectively by USB 2.0 for low-power devices, [a] but must be at least 4.75 V at all locations for high-power [b] devices (however, high-power devices are required to operate as a low-powered device so that they ...

6. Apple USB Modem - Wikipedia

   en.wikipedia.org/wiki/Apple_USB_Modem

   A device driver for the modem was introduced with Mac OS X version 10.4.3. It retailed for US$ 49 at the time of its introduction. Apart from using the Apple USB Modem for Internet dial-up and faxing, it is also being suggested as a low cost line interface (aka FXO interface) for telephony applications, such as for telephone systems (software ...

7. USB - Wikipedia

   en.wikipedia.org/wiki/USB

   USB device communication is based on pipes (logical channels). A pipe connects the host controller to a logical entity within a device, called an endpoint. Because pipes correspond to endpoints, the terms are sometimes used interchangeably. Each USB device can have up to 32 endpoints (16 in and 16 out), though it is rare to have so many ...