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Usb universal serial bus

Different Era of Usb

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Usb universal serial bus

  1. 1. Agenda What is USB? Pre-Releases Of USB History Of USB USB 3.0 Now Key Features Connector Properties Connector Types Application Conclusion
  2. 2. What is USB? USB stands for Universal Serial Bus Provides an expandable, fast, bi-directional, low cost, hotpluggable Plug and Play serial hardware interface Allows users to connect a wide variety of peripherals to acomputer and have them automatically configured andready to use Implemented to provide a replacement for legacy ports tomake the addition of peripheral devices quick and easy forthe end user
  3. 3. Pre-Releases of USB USB 0.7: Released in November 1994. USB 0.8: Released in December 1994. USB 0.9: Released in April 1995. USB 0.99: Released in August 1995. USB 1.0: Released in November 1995
  4. 4. History of USB There have been three versions released priorto 3.0 USB 1.0 in January 1996 – data rates of 1.5 Mbps up to 12Mbps USB 1.1 in September 1998 – first widely used version of USB USB 2.0 in April 2000Major feature revision was the addition of a high speed transfer rate of480 Mbps
  5. 5. USB 3.0 Now On Nov 17,2008 It was Developed It is called as “SUPER SPEED” Technology Transfer Mode of Up to 4.8 Gbps
  6. 6. Key Features Single connector type Replaces all different legacy connectors with one well-defined standardized USB connector for all USB peripheraldevices Hot swappable Devices can be safely plugged and unplugged as neededwhile the computer is running (no need to reboot) Plug and Play OS software automatically identifies, configures, and loadsthe appropriate driver when connection is made
  7. 7. Key Features High performance USB offers data transfer speeds at up to 4.8 Gbps Expandability Up to 127 different peripheral devices may theoretically beconnected to a single bus at one time Bus-supplied power USB distributes the power to all connected devices,eliminating the need for an external power source for lowpower devices (flash drives, memory cards, Bluetooth)
  8. 8. Connector properties Availability Consumer Products are expected to become available in2010 Usability Most connectors cannot be plugged in upside down Durability The standard connectors were designed to be robust Compatibility Two-way communication is also possible. In USB3.0, full-duplex communications are done when usingSuperSpeed (USB 3.0) transfer
  9. 9. Connector Types • male micro USB• male mini USB B-type• male B-type• female A-type• male A-type
  10. 10. USB 3.0 vs. Other Standards FireWire 1394 has a maximum data transfer rate of 800Mbps eSATA bus a a maximum data transfer rate of 3.2 Gbps Example: Asus demonstrated transfer of a 25 GB HD movie in 70seconds using a USB 3.0 bus versus the USB 2.0 transfertime of about 4 hours
  11. 11. CablesPin Name CableColorDescription1 VCC Red +5 V2 D− White Data −3 D+ Green Data +4 GND Black Ground
  12. 12. Maximum Useful Distance USB 1.1 maximum cable length is 3 metres (9.8 ft) USB 2.0 maximum cable length is 5 metres (16 ft) USB 3.0 cable assembly may be of any length
  13. 13. USB 2.0 & USB 3.0
  14. 14. APPLICATIONSUSB implements connections to storage devices using a setof standards called the USB mass storage device class.USB 3.0 can also support portable hard disk drives. Theearlier versions of USBs were not supporting the 3.5 inchhard disk drives.These external drives usually contain a translating devicethat interfaces a drive of conventional technology (IDE,PATA, SATA, ATAPI, or even SCSI) to a USB port.
  15. 15. Why the upgrade? Mainly the need for faster transfer rates in devices suchas hard drives, flash card readers, and DVD, Blu-ray,and HD DVD optical drives User applications demanding a higher performanceconnection between the PC and peripherals Need for greater energy efficiency in today’s “greenerworld”
  16. 16. ConclusionThe Universal serial bus 3.0 is supporting a speed ofabout 5 Gb/sec i.e. ten times faster than the 2.0version.So hopefully by the help of this SuperSpeed datatransfer rate the USB 3.0 will be replacing many ofthe connecters in the future

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Different Era of Usb


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