Shadi AgelShadi AgelPongsakorn BunyaphriruangPongsakorn Bunyaphriruang

Chih-Chung ChangChih-Chung ChangWinnie ChiaWinnie Chia

USB 2.0 VS FireWire

Transformation of Back PanelTransformation of Back Panel

Back Panel before PC99 standard

Back Panel After PC99 standard

New Back Panel with FireWire and USB 2.0

Different kinds of cablesDifferent kinds of cables

Printer cable

PS/2 mouse/keyboard extend cable

BNC monitor cable

SCSI Cable RS-232

Cost• Specialized production increase cost

• Decrease in Price ( Results in only 0.2 cents per printer cable in profit)

Why did we change?Why did we change?

Why did we change?Why did we change?SPEED

Convenient

Hot swappable

Plug and Play

Single Connector

Why did we change?Why did we change?

USB 1.1USB 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

Weakness of USB 1.1Weakness of USB 1.1

Slow speed (Slower than SCSI’s 40Mbps)

Needs CPU to handle control device

USB 2.0USB 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.

History of USB 2.0

Fully backwards compatible with USB Fully backwards compatible with USB 1.11.1

Speeds of up to 480 Mega bits per Speeds of up to 480 Mega bits per secondsecond

Supports 1.5 Mbps, 12Mbps and 480 Supports 1.5 Mbps, 12Mbps and 480 Mbps speedMbps speed

Feature of USB 2.0(1)Feature of USB 2.0(1)

Supports dynamic speed changingSupports dynamic speed changing

Supports multiple speeds in one tree.Supports multiple speeds in one tree.

Feature of USB 2.0(2)Feature of USB 2.0(2)

USB 1.1 device USB 1.1 device connectionconnection

USB 1.1 HUB

ExternalCDRW

Mouse

ExternalCDRW

M.B

KeyboardWith USB hub

1.5Mbps

12Mbps

12 Mbps

1.5Mbps

The speed limit by previous device

1.5Mbps

12 Mbps

USB 2.0 device USB 2.0 device connectionconnection

USB 2.0 HUB

ExternalCDRW

Mouse

PC camera

M.B

KeyboardWith USB hub(USB2.0)

1.5Mbps

1.5Mbps12Mbps480Mbps

480 Mbps

480Mbps

The speed can be changed if needed

1.5Mbps

12 Mbps

FireWireFireWire

Developed by Apple Inc.Developed by Apple Inc.

Replaced AV-cable, coaxial cable, S-Replaced AV-cable, coaxial cable, S-video cablevideo cable

First product hit the market in 1997First product hit the market in 1997

History of FireWire

Features for FireWire(1)Features for FireWire(1)

Digital transmission (AV-cable and S-Digital transmission (AV-cable and S-video cable are transmitted by analog video cable are transmitted by analog signal)signal)

Speeds of up to 400 Mbps for 1394aSpeeds of up to 400 Mbps for 1394a

Supports 100 Mbps, 200 Mbps and 400 Supports 100 Mbps, 200 Mbps and 400 Mbps speedMbps speed

Features for FireWire(2)Features for FireWire(2)

Only supports peer to peer connectionOnly supports peer to peer connection

Hot-swappableHot-swappable

Plug and playPlug and play

Different kinds of FireWireDifferent kinds of FireWire

4 PIN4 PIN Used mainly in consumer electronic industryUsed mainly in consumer electronic industry Small size connector makes it easy to build Small size connector makes it easy to build

on a deviceon a device

6 PIN6 PIN Used mainly in computer industryUsed mainly in computer industry Extra 2 pins supply the power to each Extra 2 pins supply the power to each

devicedevice Larger connector makes it harder to breakLarger connector makes it harder to break

ConfigurationConfiguration

Data is transmitted digitallyData is transmitted digitally

IsochronousIsochronous

Data is transmitted in packetData is transmitted in packet

ArbitrationsArbitrations

FireWire VS USB 2.0

USB 2.0USB 2.0

Star- tiered topologyStar- tiered topologySupports up to 127 Supports up to 127 devicesdevicesHot swappableHot swappable

Host (Root Hub)

Hub 1 node node

Hub 2 node

Hub 3

Hub 4

node

node

node

node

First Principles

SecondPeripherals

FireWire (IEEE 1394)FireWire (IEEE 1394)

Tree TopologyTree TopologyNo LoopNo LoopSupports 64 devicesSupports 64 devicesHot swappableHot swappablePeer to Peer connectionPeer to Peer connection

PC

Advantages of USB 2.0Advantages of USB 2.0

Hot-swappableHot-swappableSupports up to 127 devices for a single Supports up to 127 devices for a single computercomputerPlug and playPlug and playSupports multiple speedsSupports multiple speeds

(1.5mbps, 12Mbps, 480Mbps)(1.5mbps, 12Mbps, 480Mbps)

Advantages of FireWireAdvantages of FireWire

Speeds up to 400 MbpsSpeeds up to 400 MbpsSupports up to 63 devicesSupports up to 63 devicesHot-swappableHot-swappableLow costLow costOperating System (windows 98, windows Operating System (windows 98, windows 2000, windows XP)2000, windows XP)Generally accepted by consumer Generally accepted by consumer electronic manufactureselectronic manufactures

Disadvantages: USB 2.0 /FireWireDisadvantages: USB 2.0 /FireWire

USB 2.0USB 2.0 No O.S. native support.No O.S. native support.

Expensive (for consumer)Expensive (for consumer)

Not generally accepted by consumer electronic Not generally accepted by consumer electronic manufacturesmanufactures

FireWireFireWire Speed of only 400Mbps vs. USB 2.0 480MbpsSpeed of only 400Mbps vs. USB 2.0 480Mbps

Expensive( for consumer and manufacture)Expensive( for consumer and manufacture)

AvailabilityAvailabilityUSB 2.0USB 2.0

few products available in the market and only in PC.few products available in the market and only in PC. less than 1% of PC have USB 2.0, but continue to replaceless than 1% of PC have USB 2.0, but continue to replace USB 1.1.USB 1.1. Not available in Mac.Not available in Mac.

FireWireFireWire mostly used in consumer electronic (DV, digital Videomostly used in consumer electronic (DV, digital Video recorder)recorder) 25% of new computer equipped with FireWire port25% of new computer equipped with FireWire port

ForecastForecast

FireWire (IEEE 1394)FireWire (IEEE 1394) IEEE 1394b: speed of 800MbpsIEEE 1394b: speed of 800Mbps Next generation 3.2GbpsNext generation 3.2Gbps

USB 2.0USB 2.0 InfiniBand 1.0: Speeds up to 3Gbps inInfiniBand 1.0: Speeds up to 3Gbps in year 2006year 2006

The End

• 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?

Questions