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Universal Serial Bus (USB)

Universal Serial Bus (USB). Cory Koby Fred Smith Jr. Table of Contents. USB 1.0 / 1.1 USB 2.0 USB 3.0 Comparison and Compatibility. Time Lines of USB and FireWire. FireWire 400 800 s3200

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Universal Serial Bus (USB)

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  1. Universal Serial Bus (USB) Cory Koby Fred Smith Jr.

  2. Table of Contents • USB 1.0 / 1.1 • USB 2.0 • USB 3.0 • Comparison and Compatibility

  3. Time Lines of USB and FireWire FireWire 400 800 s3200 1995 2001 2010 1.0/1.1 2.0 3.0 USB

  4. USB 1.0 and 1.1 • USB is a high performance universal serial bus communication technology used on computers and peripherals to transfer data between them. • USB has four types of communication transfer modes • Control - is initiated by the host. Control mode is used in initialization of devices, but it can transfer small amounts of data. • Interrupt - is used by the host to query a device to check if it needs to be serviced. • Bulk - an example of Bulk is disk drivers. • Isochronous - an example of Isochronous is USB audio speakers.

  5. USB 1.0 and 1.1 continued • USB • Developed due to problems and complications caused by having so many connections for peripheral devices on computer systems. • Too many different types of ports with limited uses • Serial, Parallel, PS/2, Etc • USB solved this limitation by limiting the number of different types of ports needed to connect to a computer. USB is specifically designed to allow easy connection of a wide variety of devices. It is intended to be user friendly.

  6. USB 1.0 and 1.1 Benefits • Technology allows for up to 127 Device to be connected at a time to a host controller. • Allows for Hot-Swapping • Your device can be plugged and unplugged safely whenever you like. • Allows for “Plug and Play” of devices • Operating system automatically recognizes the USB device and loads the appropriate drivers.

  7. USB 2.0 • USB 2.0 is the upgrade to the 1.1 Standard • Technology was introduced and standardized in 2001 • Upgrades were continued to be made to the Standard through ECN’s • ECN (Engineering Change Notice)

  8. Benefits of USB 2.0 • Increased Speed over 1.0/1.1 • USB 1.0/1.1 Max Speed was 12Mbits/s • USB 2.0 Max Speed is 480 Mbit/s • 40x Faster than 1.1 • Was given the title Hi-Speed • Simplifies connectivity to System BUS • Decreases number of connectors needed • Is Backwards compatible with USB 1.0 and 1.1 Devices

  9. Current Trends • USB 2.0 is mainly used for expandability • External Hard Disks, External CD/DVD-ROMs, External CD/DVD-Burners • These devices, with USB 1.0/1.1, could only operate at a fraction of their capacity, but USB 2.0 and its 480 Mbit/s bandwidth allows for much faster data transfer and communication. • Ports are currently used on a multitude of portable devices to transfer information • Cell Phones, MP3 Players, Digital Cameras, etc.

  10. USB 3.0: Superspeed • Certified under the name ‘SuperSpeed’ • New Theoretical Max = 5 Gbits/s • Upgraded from Half-Duplex (1.0/1.1/2.0) to Full-Duplex communication with Peripherals • No longer uses Polling, technology upgraded to packet-routing. • Lower Power Consumption • Reduced by 85%

  11. Competitors/Comparison Competitors USB 3.0 Speed – 4.8 (Actual) 5 Gbits/s (Theoretical) Full-Duplex Bi-Directional Communication with Peripherals Packet Routing Allows for power saving and faster data transfer. All devices can transfer at the same time • Firewire S3200 • Firewire runs at 3.2 Gbits/s • Full duplex communication (bi-directional) • eSATA • Used for External Hard Drives • Runs at 3.2 Gbits/s

  12. Backwards Compatible • USB 3 and 2.0 are backwards compatible, though the speed is automatically scaled down to the lower technology. • USB cables are all the same format for connectors. • However, for extra power, USB 3.0 cables are specially hard-wired for printers and scanners, etc. • New connectors for USB 3.0 are blue.

  13. References • Unknown. "Universal Serial Bus (USB *) Specifications.“ Intel.com. Intel, N.D. Web. 21 Jan 2013. http://www.intel.com/technology/usb/spec.htm?iid=Tech_usb+spec2. • Allyn-Feuer, Ari. “Super speed: a brief history of USB 3.0, 2007-2018.” ARSTechnica, Web. 1 Feb 2013. http://arstechnica.com/gadgets/2009/08/super-speed-a-brief-history-of-usb-30/2/. • Viswanath, Somnath. “SuperSpeedUSB 3.0: Ubiquitous Interconnect for Next Generation Consumer Applications” Arasan Chip Systems Inc., Web. 2 Feb 2013. http://arasan.com/wp-content/media/Arasan_USB_3_0_Enables_New_Usage.pdf. • White Paper. “USB 3.0* Radio Frequency Interference Impact on 2.4 GHz Wireless Devices” Intel, N.D. Web. 1 Feb 2013. http://www.usb.org/developers/whitepapers/327216.pdf

  14. Universal Serial Bus (USB) Cory Koby Fred Smith Jr.

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