What is USB (interface)?
Abbreviation for Universal Serial Bus, USB is a plug-and-play interface!
The interface allows a computer, or smartphone, as well as other devices, such as MAC PC, to communicate with peripherals and other devices (printers, plotters, mouse, keyboard, scanners, ...).
Use and disadvantages!
Today, this interface is even used in medicine as a link between various high-quality devices. But it also has its drawbacks, because some Chinese manufacturers are pushing to the market by the realization that they are technically inferior to a 100 Euro smartphone and sometimes cost 10,000 euros.
In fact, USB1 / USB2 / USB3 connected devices cover a large bandwidth. Almost everything from keyboards and mice, to music players (iPod, MP3 player) and flash drives. USB can also be used to power certain devices, such as smartphones and tablets, and recharge their batteries. The first version of the Universal Serial Bus was in 1995.
The USB devices and the USB standard!
This industry standard was quickly adopted by Intel, Compaq, Microsoft and other companies. And is distributed worldwide as a communication standard!
Among other things, this is used with digital camera, external drives, iPod, or other MP3 players, keyboards, keypad, microphones, mouse, plotter, printer , joystick, scanner, smartphone, tablets, webcams, etc ...
| (Image-1) Example USB Cable for USB-Interface!
USB as industry standard!
USB is an industry standard designed to define cables, connectors, and protocols for connecting, communicating, and powering computers, smartphones, iPhones, and other peripherals. USB cables are limited in length because the standard for connecting peripheral devices was on the same workstation and was not intended to be between rooms or between buildings. Low-performance, high-performance devices will continue to function with this standard, but devices that use Super-Speed USB 3.0 / 3.01, for example, can take advantage of the increased available current between 150 mA and 900 mA. See ►►► My USB-3 is too slow!
Detection of the USB by OS!
When an USB device is first connected to an USB host (PC, Smartphone, iPhone), it starts the USB device polling process, which starts sending a reset signal to the USB device. The data rate of the device is determined / ascertained / detected. If the device is supported by the device in question, device drivers are loaded, and if successful, the USB device can be used.
FAQ 63: Updated on: 10 July 2018 09:43
Glossar - FAQ-63: What is USB (interface)?
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