Universal Serial BusPresented By: Muhammad Ahsan Rauf Class: 9Th B(EM)
What is USBUSB (Universal Serial Bus) is a specification to establish communicationbetween devices and a host controller (usually personal computers).USB is intended to replace many varieties of serial and parallel ports.USB can connect computer peripherals such as mice, keyboards, digitalcameras, printers, personal media players, flash drives, and external harddrives. For many of those devices,USB has become the standard connection method.USB was designed for personal computers
History of USBThe USB 1.0 specification was introduced in 1996.USB was created by a core group of companies that consisted of Compaq,Digital, IBM, IntelMicrosoft produced a USB software for Windows that interact with USBDeviceThe USB 2.0 specification was released in April 2000 and wasstandardized by the USB-IFThe USB 3.0 specification was released on November 12, 2008 by theUSB 3.0 Promoter Group.
Feature of USBMultiple peripheral devices connected in a tiered-star topologyUSB allowing branching into a tree structure with up to five tier levelsA USB host may have multiple host controllersWe can connect Up to 127 devices via USB, including the hub devicesUSB device communication is based on pipes (logical channels)
UBS ClassesClass Type Description00h Device Unspecified01h Interface Audio02h Both Communication03h Interface Human Interface Device05h Interface Physical Interface Device06h Interface Image07h Interface Printer08h Interface Mass Storage
Type of USBUSB-AUSB-BMicro USBMini USBMicro-AB Socket OTG
Version of USBUSB 1.0 specification had a data transfer rate of 1.5 Mbit/s.USB 2.0 specification had a data transfer rate of 12 Mbit/s.USB 3.0 specification had a data transfer rate of 480 Mbit/s.
Application of USBThe USB are generally use to connect the device from the computer such as Mouse Keyboards digital cameras Printers personal media players flash drives external hard drives
Interesting information about USBIn Windows 7 it is used as a ram or virtiual memory byREADY BOOST, feature of Windows7.In Windows XP it is used as a ram or virtiual memory byeBOOSTER software designed for Windows XP to upgraderam.