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In computing, the USB human interface device class (USB HID class) is a part of the USB specification for computer peripherals: it specifies a device class (a type of computer hardware) for human interface devices such as keyboards, mice, touchscreen, game controllers and alphanumeric display devices. The USB HID class is defined in a number of ...
The USB 3.x family has had the same technical notation retroactively added in the USB 3.1 and USB 3.2 specification versions. Though this shows common principles and the same generations refer to the same nominal speeds, "Gen A" does not have the same exact meaning in both USB 3.x and USB4 specifications.
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.
A USB network relies on a single host at the top of the tree to control the network. All communications are between the host and one peripheral. In a FireWire network, any capable node can control the network. USB runs with a 5 V power line, while FireWire supplies 12 V and theoretically can supply up to 30 V.
The USB video device class (also USB video class or UVC) is a USB device class that describes devices capable of streaming video like webcams, digital camcorders, transcoders, analog video converters and still-image cameras. The latest revision of the USB video class specification carries the version number 1.5 and was defined by the USB ...
30 pin receptacle including the following electrical interfaces: 2-lane DisplayPort v1.1a, USB 3.0, USB On-The-Go, Analog stereo line-out, HDMI CEC for remote control, high output power line from both host and portable device Male Mini-VGA plug on top of an Apple laptop, female port is second from right. Mini-VGA (used for laptops)
USB-C devices support power currents of 1.5 A and 3.0 A over the 5 V power bus in addition to baseline 900 mA. These higher currents can be negotiated through the configuration line. Devices can also utilize the full Power Delivery specification using both BMC-coded configuration line and legacy BFSK-coded V BUS line. [32]: §4.6.2.1
USB-C plug USB-C (SuperSpeed USB 5Gbps) receptacle on an MSI laptop. USB-C, or USB Type-C, is a 24-pin, reversible connector (not a protocol) that supersedes previous USB connectors and can carry audio, video, and other data, to connect to monitors or external drives. It can also provide and receive power, to power, e.g., a laptop or a mobile ...