Shadi Agel

1
USB 2.0 VS FireWire

• Shadi Agel
• Pongsakorn Bunyaphriruang
• Chih-Chung Chang
• Winnie Chia

2
Transformation of Back Panel
Back Panel before PC99 standard
Back Panel After PC99 standard
New Back Panel with FireWire and USB 2.0
3
Different kinds of cables
Printer cable
BNC monitor cable
PS/2 mouse/keyboard extend cable
SCSI Cable
RS-232
4
Why did we change?

• Cost
• Specialized production increase cost
• Decrease in Price ( Results in only 0.2 cents
  per printer cable in profit)

5
Why did we change?
SPEED
6
Why did we change?

• Convenient
• Hot swappable
• Plug and Play
• Single Connector

7
USB 1.1

• Introduced in 1995
• Designed to replace every external connector
• 1.5 Mbps or 12 Mbps speed
• Only requires single IRQ for all devices
  connected
• Hot-swappable
• Plug and Play

8
Weakness of USB 1.1

• Slow speed (Slower than SCSIs 40Mbps)
• Needs CPU to handle control device

9
USB 2.0
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History of USB 2.0

• Developed by Compaq, Intel , Microsoft, NEC,
• HP, Lucent and Philips on April27, 2000.
• Replaced the old USB 1.1 standard.
• First product hit the market in Spring 2001.

11
Feature of USB 2.0(1)

• Fully backwards compatible with USB 1.1
• Speeds of up to 480 Mega bits per second
• Supports 1.5 Mbps, 12Mbps and 480 Mbps speed

12
Feature of USB 2.0(2)

• Supports dynamic speed changing
• Supports multiple speeds in one tree.

13
USB 1.1 device connection
External CDRW
The speed limit by previous device
1.5Mbps
Keyboard With USB hub
Mouse
1.5Mbps
M.B
1.5Mbps
12Mbps
USB 1.1 HUB
External CDRW
12 Mbps
12 Mbps
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USB 2.0 device connection
External CDRW
The speed can be changed if needed
480Mbps
Keyboard With USB hub (USB2.0)
Mouse
1.5Mbps
M.B
1.5Mbps
1.5Mbps 12Mbps 480Mbps
USB 2.0 HUB
PC camera
480 Mbps
12 Mbps
15
FireWire
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History of FireWire

• Developed by Apple Inc.
• Replaced AV-cable, coaxial cable, S-video cable
• First product hit the market in 1997

17
Features for FireWire(1)

• Digital transmission (AV-cable and S-video cable
  are transmitted by analog signal)
• Speeds of up to 400 Mbps for 1394a
• Supports 100 Mbps, 200 Mbps and 400 Mbps speed

18
Features for FireWire(2)

• Only supports peer to peer connection
• Hot-swappable
• Plug and play

19
Different kinds of FireWire

• 4 PIN
• Used mainly in consumer electronic industry
• Small size connector makes it easy to build on a
  device
• 6 PIN
• Used mainly in computer industry
• Extra 2 pins supply the power to each device
• Larger connector makes it harder to break

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Configuration

• Data is transmitted digitally
• Isochronous
• Data is transmitted in packet
• Arbitrations

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FireWire VS USB 2.0
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USB 2.0

• Star- tiered topology
• Supports up to 127 devices
• Hot swappable

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FireWire (IEEE 1394)
Second Peripherals

• Tree Topology
• No Loop
• Supports 64 devices
• Hot swappable
• Peer to Peer connection

PC
First Principles
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Advantages of USB 2.0

• Hot-swappable
• Supports up to 127 devices for a single computer
• Plug and play
• Supports multiple speeds
• (1.5mbps, 12Mbps, 480Mbps)

25
Advantages of FireWire

• Speeds up to 400 Mbps
• Supports up to 63 devices
• Hot-swappable
• Low cost
• Operating System (windows 98, windows 2000,
  windows XP)
• Generally accepted by consumer electronic
  manufactures

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Disadvantages USB 2.0 /FireWire

• USB 2.0
• No O.S. native support.
• Expensive (for consumer)
• Not generally accepted by consumer electronic
• manufactures
• FireWire
• Speed of only 400Mbps vs. USB 2.0 480Mbps
• Expensive( for consumer and manufacture)

27
Availability

• USB 2.0
• few products available in the market and only
  in PC.
• less than 1 of PC have USB 2.0, but continue
  to replace
• USB 1.1.
• Not available in Mac.
• FireWire
• mostly used in consumer electronic (DV,
  digital Video
• recorder)
• 25 of new computer equipped with FireWire
  port

28
Forecast

• FireWire (IEEE 1394)
• IEEE 1394b speed of 800Mbps
• Next generation 3.2Gbps
• USB 2.0
• InfiniBand 1.0 Speeds up to 3Gbps in
• year 2006

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The End
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Questions

• 1) What were the main reasons for the change from
  serial,
• printer, game, and ps/2 ports to the USB
  1.1 port?
• 2) What are the main differences between USB 1.1
  and USB 2.0?
• 3) Explain the speed limitations when connecting
  USB 1.1 and
• USB 2.0 devices.
• 4) What are the main reasons for the development
  of Firewire and how does it make connecting
  devices to each other easier?
• 5) Explain the differences between Firewire and
  USB 2.0?