USB (Universal Serial Bus) is a specification that allows for communication between devices and a host controller, usually a personal computer. It was designed to replace many serial and parallel ports and can connect devices like mice, keyboards, cameras, printers, and external storage. The USB specifications have evolved over time, with USB 1.0 introduced in 1996 at 1.5 Mbps, USB 2.0 in 2000 at 12 Mbps, and USB 3.0 in 2008 at 480 Mbps. USB allows for branching connections between devices using a tiered-star topology.

1. Universal Serial Bus Presented By: Satish Kumar Sonker Allahabad Up India

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 Mice Keyboards digital cameras Printers personal media players flash drives external hard drives

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