Shadi Agel Pongsakorn Bunyaphriruang Chih-Chung Chang Winnie Chia USB 2.0 VS FireWire

Transformation 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 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?

SPEED

Convenient Hot swappable Plug and Play Single Connector Why did we change?

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

Weakness of USB 1.1 Slow speed (Slower than SCSI’s 40Mbps) Needs CPU to handle control device

USB 2.0

Developed by Compaq, Intel, Microsoft, NEC, HP, Lucent and Philips on April27, Replaced the old USB 1.1 standard. First product hit the market in Spring History of USB 2.0

Fully backwards compatible with USB 1.1 Fully backwards compatible with USB 1.1 Speeds of up to 480 Mega bits per second Speeds of up to 480 Mega bits per second Supports 1.5 Mbps, 12Mbps and 480 Mbps speed Supports 1.5 Mbps, 12Mbps and 480 Mbps speed Feature of USB 2.0(1)

Supports dynamic speed changing Supports dynamic speed changing Supports multiple speeds in one tree. Supports multiple speeds in one tree. Feature of USB 2.0(2)

USB 1.1 device connection USB 1.1 HUB External CDRW Mouse External CDRW M.B Keyboard With USB hub 1.5Mbps 12Mbps 1.5Mbps The speed limit by previous device 1.5Mbps 12 Mbps

USB 2.0 device connection USB 2.0 HUB External CDRW Mouse PC camera M.B Keyboard With USB hub (USB2.0) 1.5Mbps 12Mbps 480Mbps The speed can be changed if needed 1.5Mbps 12 Mbps

FireWire

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

Features for FireWire(1) Digital transmission (AV-cable and S-video cable are transmitted by analog signal) Digital transmission (AV-cable and S-video cable are transmitted by analog signal) Speeds of up to 400 Mbps for 1394a Speeds of up to 400 Mbps for 1394a Supports 100 Mbps, 200 Mbps and 400 Mbps speed Supports 100 Mbps, 200 Mbps and 400 Mbps speed

Features for FireWire(2) Only supports peer to peer connection Only supports peer to peer connection Hot-swappable Hot-swappable Plug and play Plug and play

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

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

FireWire VS USB 2.0

USB 2.0 Star- tiered topology Supports up to 127 devices Hot swappable Host (Root Hub) Hub 1 Hub 2 Hub 3 Hub 4 node

First Principles Second Peripherals FireWire (IEEE 1394) Tree Topology No Loop Supports 64 devices Hot swappable Peer to Peer connection PC

Advantages of USB 2.0 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) (1.5mbps, 12Mbps, 480Mbps)

Advantages of FireWire 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

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

Availability USB 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 replace less 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.FireWire mostly used in consumer electronic (DV, digital Video mostly used in consumer electronic (DV, digital Video recorder) recorder) 25% of new computer equipped with FireWire port 25% of new computer equipped with FireWire port

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 year 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