Universal Serial Bus USB - PowerPoint PPT Presentation

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Universal Serial Bus USB

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FireWire. Universal Serial Bus USB. Instant connection of external devices ... FireWire. Supports up to 63 devices on a single bus ... – PowerPoint PPT presentation

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Title: Universal Serial Bus USB


1
USB 2 FireWire
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Universal Serial Bus USB
  • Instant connection of external devices
  • No adapter cards needed
  • Mouse, joysticks, thumbnail drives
  • PC standard
  • 1.5 - 12 Megabits

5
USB 2
  • 40 x faster USB 1.1
  • 480 Mbps
  • Ideal for
  • External hard drives
  • CD-RWs
  • DVD-r
  • Card adapters

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Firewire 400 / 800
  • 400 megabits /sec
  • Firewire/1394
  • Ideal for
  • Digitial video
  • High speed storage devices
  • Scanners
  • CD-RW drives

8
How Does FireWire Work
  • IEEE-1394
  • Very complex serial bus protocol
  • Standard cables and connectors
  • I/O connectors gone
  • FireWire cabling is similar to that of 10BaseT
    Ethernet
  • Uses a fairness arbitration approach
  • Ensure all information is transmitted using the
    bus
  • Layered transport system

9
How Does FireWire Work
  • Three layers
  • Physical, Link, Transaction
  • Physical
  • Provides the signals required by the bus
  • Link
  • Takes the raw data from the physical layer
  • Formats it into recognizable 1394 packets
  • Transaction
  • Takes the packets presents them into the
    application
  • Remainder of the transaction functions are
    performed in software

10
FireWire
  • Supports up to 63 devices on a single bus
  • Instandlt connect devices w/o turning off other
    machines
  • Ability to stream A/V data in realtime
  • Originally developed by Apple
  • Gone from 400 -800 Mbps
  • Products come with FireWire connections

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USB 2 FireWire
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4 - 6 pin
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6 - 6 pin
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BJ
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3 FireWire card
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4 - 4 pin
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USB 2 Vs FireWire
  • USB 2 is faster then FireWire 400
  • USB card or Motherboard
  • If not than it runs at 1.1
  • Backward compatible w 1.1
  • Thumb drives 2,0
  • Cables
  • USB 2 is faster then FireWire 800
  • 800 faster
  • Most cameras are FireWire connection 4 pin

22
USB 2 FireWire
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