Universal serial bus(usb)
- 1. UNIVERSAL SERIAL BUS(USB) By SWAROOP P S
- 2. INTRODUCTION USB stands for Universal Serial Bus. In 1995-96 Compaq, Digital Equipment Corporation (DEC), IBM, Intel, Microsoft and NEC, joined later by Hewlett-Packard, Lucent and, Philips got together and designed the USB. Provides an expandable, fast, bi-directional, low cost, hot pluggable Plug and Play serial hardware interface. Allows users to connect a wide variety of peripherals to a computer and have them automatically configured and ready to use. The USB was created out of a need for universal communication between devices.
- 3. Evolution of USB USB TYPE SPEED TITLE BANDWIDTH USB 1.0 Low Speed 1.5 Mbps USB 1.1 Full Speed 12 Mbps USB 2.0 High Speed 480 Mbps USB 3.0 Super Speed 5 Gbps USB 3.1 Super Speed+ 10 Gbps
- 5. USB Keyterms : Host : Computer that controls the interface. Control the media access ( no one can access the bus unless it get an approval required from the host ) . Hub : Devices with one or more connections to USB devices and hardware to enable communications with each devices. Device : Everything in the USB system, which is not a host, is a device (include hubs) .
- 6. Features : USB controller: Formats the data for the operating system on read and write. Root Hub: connection point to the host. Host is always the reference IN: Host is going to receive the data. OUT: Host is going to send the Data.