USB 3.0

transcript

Universal Serial Bus 3.0

INFINITE POSSIBILITIES!

What is USB?

USB stands for Universal Serial BusProvides an expandable, fast, bi-

directional, low cost, hot pluggable Plug and Play serial hardware interface

Allows users to connect a wide variety of peripherals to a computer and have them automatically configured and ready to use

What is USB? contd.

Implemented to provide a replacement for legacy ports to make the addition of peripheral devices quick and easy for the end user

History of USB

Developed and standardized by a group of leading companies from the computer and electronics industries in 1995

USB specifications were developed by Compaq, DEC, IBM, Intel , Microsoft, and NEC, joined later by HP, Lucent, and Phillips

History of USB contd.

These companies formed the USB Implementers Forum as a non-profit to publish specifications and provide a support organization and forum for the advancement and adoption of USB technology

There have been three versions released prior to 3.0

History of USB contd.

USB 1.0 in January 1996 – data rates of 1.5 Mbps and 12 Mbps

USB 1.1 in September 1998 – first widely used version of USB

USB 2.0 in April 2000Major feature revision was the addition of a high

speed transfer rate of 480 Mbps Important note – all versions are backwards

compatible with previous versions of USB

USB Now

The next generation of USB hardware and specifications is USB 3.0

Version was announced by Pat Gelsinger at the Intel Developer Forum in September 2007

USB 3.0 Promoter Group announced in November 2008

Why the upgrade?

Mainly the need for faster transfer rates in devices such as hard drives, flash card readers, and DVD, Blu-ray, and HD DVD optical drives

User applications demanding a higher performance connection between the PC and peripherals

Why the upgrade? contd.

Need for greater energy efficiency in today’s “greener world”

USB 3.0 Contributors

USB 3.0 Promoter Group Announcement

USB 3.0 Contributors

USB 3.0 Contributors contd.

USB 3.0 Features

10x performance increase over USB 2.0Backward Compatible

Legacy devices continue to work when plugged into new host connector.

New devices work when plugged in legacy systems albeit at USB 2.0 speeds.

Existing class drivers continue to work.

USB 3.0 Features contd.

Same USB Device ModelPipe ModelUSB FrameworkTransfer Types

Power EfficientProvides excellent power characteristics

(especially for ideal links)Both on the device and the platform

Eliminate need for polling

USB 3.0 Features contd.

ExtensibleProtocol designed to efficiently scale up

USB 2.0 vs. USB 3.0

USB 3.0 Bus Architecture

USB 3.0 Bus Architecture contd.

Dual-bus architecture SuperSpeed bus operates concurrently with USB 2.0Electrically/mechanically backward &

forward compatibleDevices discovered/configured at fastest

signaling rateHubs provides additional connection points

USB 3.0 Bus Architecture contd.

SuperSpeedDual simplex signalingPackets routed to deviceHubs stored and forwardAsynchronous notifications

USB 3.0 Connector

USB 3.0 Standard-A connector

Std A – Same interface as USB 2.0 Standard-A connector, but with added pins for USB 3.0 Super-Speed signals

Complete campatibility with USB 2.0 Standard-A connector

USB 3.0 Standard-A connector contd.

Double-stacked connectors supported

USB 3.0 Standard-B connector

Std B – Defined for relativley large, stationary peripherals such as hard drivers and printers

Visually different from USB 2.0 Standard-B connectorBut the receptacle accepts a USB 2.0

Standard-B plug

USB 3.0 Standard-B connector contd.

Developed for device-powered applicationsFor example – wireless adaptors

Based on the USB 3.0 Standard-B connector design, but with additional device POWER and GND pins for a device to supply power

The receptacle accepts the USB 3.0 Powered-B plug, USB 3.0 Standard-B plug,or USB 2.0 Standard-B plug

USB 3.0 Micro connector family

Defined for hand held devicesBackward campatible with USB 2.0

Micro connectorsMicro B – Based on the proven USB 2.0

Micro-B connector design with an extended portion for the Super-Speed signals

USB 3.0 Micro connector family contd.

USB 3.0 Micro-A and –AB connectors are identical to USB 3.0 Micro-B connector except for keying/profile differences

USB 3.0 Products

USB 3.0 products

Buffalo produce world's first USB 3.0 hard disk drive

Point Grey puts USB 3.0 into a webcam

Thank You

USB 3.0

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