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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 board provides connectivity via USB, USB-OTG or Bluetooth, and is controllable from within an Android application using the Java API. [1] [4] [9] [10] [11] In addition to basic digital input/output and analog input, the IOIO library also handles PWM, I2C, SPI, UART, Input capture, Capacitive sensing and advanced motor control. [3]
The written USB 3.0 specification was released by Intel and its partners in August 2008. The first USB 3.0 controller chips were sampled by NEC in May 2009, [4] and the first products using the USB 3.0 specification arrived in January 2010. [5] USB 3.0 connectors are generally backward compatible, but include new wiring and full-duplex operation.
PS/2 did not typically support plug-and-play, which means that connecting a PS/2 keyboard or mouse with the computer powered on does not always work and may pose a hazard to the computer's motherboard. Likewise, the PS/2 standard did not support the HID protocol. The USB human interface device class describes a USB HID.
From the computer user's perspective, the USB interface improves ease of use in several ways: The USB interface is self-configuring, eliminating the need for the user to adjust the device's settings for speed or data format, or configure interrupts, input/output addresses, or direct memory access channels. [13]
The boards are equipped with sets of digital and analog input/output (I/O) pins that may be interfaced to various expansion boards ('shields') or breadboards (for prototyping) and other circuits. The boards feature serial communications interfaces, including Universal Serial Bus (USB) on some models, which are also used for loading programs.
Parallella – single-board computer with a manycore coprocessor and field-programmable gate array (FPGA) Pinebook – Notebook from Pine64; SparkFun Electronics – microcontroller development boards, breakout boards; The Bus Pirate – universal bus interface and programmer; Turris Omnia – open-source SOHO network router
In computing, input/output (I/O, i/o, or informally io or IO) is the communication between an information processing system, such as a computer, and the outside world, such as another computer system, peripherals, or a human operator. Inputs are the signals or data received by the system and outputs are the signals or data sent from it.