USB (Universal Serial Bus) is a specification that allows for connection and communication between devices like computers, keyboards, printers and more. It was created in 1996 to serve as a standard connection method to replace variety of ports. USB allows for up to 127 devices to connect in a tiered tree structure, with devices like mice, cameras, hard drives and more commonly using USB connections. It has since been updated with faster transfer speeds in versions 2.0 and 3.0.

1. Universal Serial Bus
Presented By:
Muhammad Ahsan Rauf
Class: 9Th B(EM)

2. What is USB
USB (Universal Serial Bus) is a specification to establish communication
between 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, digital
cameras, printers, personal media players, flash drives, and external hard
drives. For many of those devices,
USB has become the standard connection method.
USB was designed for personal computers

3. History of USB
The USB 1.0 specification was introduced in 1996.
USB was created by a core group of companies that consisted of Compaq,
Digital, IBM, Intel
Microsoft produced a USB software for Windows that interact with USB
Device
The USB 2.0 specification was released in April 2000 and was
standardized by the USB-IF
The USB 3.0 specification was released on November 12, 2008 by the
USB 3.0 Promoter Group.

4. Feature of USB
Multiple peripheral devices connected in a tiered-star topology
USB allowing branching into a tree structure with up to five tier levels
A USB host may have multiple host controllers
We can connect Up to 127 devices via USB, including the hub devices
USB device communication is based on pipes (logical channels)

5. UBS Classes
Class Type Description
00h Device Unspecified
01h Interface Audio
02h Both Communication
03h Interface Human Interface Device
05h Interface Physical Interface Device
06h Interface Image
07h Interface Printer
08h Interface Mass Storage

6. Type of USB
USB-A
USB-B
Micro USB
Mini USB
Micro-AB Socket OTG

7. Version of USB
USB 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.

8. Application of USB
The 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

9. Interesting information about USB
In Windows 7 it is used as a ram or virtiual memory by
READY BOOST, feature of Windows7.
In Windows XP it is used as a ram or virtiual memory by
eBOOSTER software designed for Windows XP to upgrade
ram.

10. Thank you for watching
my presentation.