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USB for Portable DevicesUSB for Portable Devices

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USB for DesktopsUSB for DesktopsUSB was first introduced as a solution to desktop interconnectivUSB was first introduced as a solution to desktop interconnectivityityAt the time, desktops had a number of different wired interfacesAt the time, desktops had a number of different wired interfaces–– Printer, mouse, keyboard, serial, parallel, PS2Printer, mouse, keyboard, serial, parallel, PS2

USB was very successful in replacing these wired interface portsUSB was very successful in replacing these wired interface ports, , and has now become the de facto industry standardand has now become the de facto industry standardThe success of USB in the desktop space has caused a number of The success of USB in the desktop space has caused a number of portable devices to also adopt USBportable devices to also adopt USB

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USB for Portable DevicesUSB for Portable DevicesVirtually every portable device now uses USB for PC connectivityVirtually every portable device now uses USB for PC connectivityUSBUSB--IF is now expanding the functionality of USB in a portable IF is now expanding the functionality of USB in a portable device to include features like:device to include features like:–– ChargingCharging–– HostHost–– HeadsetHeadset–– VideoVideo

The USBThe USB--IF is committed to addressing new requirements for IF is committed to addressing new requirements for portable device interfaces as they emergeportable device interfaces as they emerge

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USB-IF Initiatives for Portable DevicesUSB-IF Initiatives for Portable Devices

The USBThe USB--IF has addressed and is addressing portable device IF has addressed and is addressing portable device requirements through the following efforts:requirements through the following efforts:

Industry participation in these activities is key to their succeIndustry participation in these activities is key to their success ss

The goal of these efforts is to promote and support USB as a The goal of these efforts is to promote and support USB as a standard universal interface for portable devicesstandard universal interface for portable devices

– Micro-USB– On-The-Go– Battery Charging– Embedded Host– Audio Headset

– Video Display– Media Transfer Protocol– Mass Storage– Serial Link PHY interface

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Micro-USB for Portable DevicesMicro-USB for Portable DevicesIndustry standardIndustry standard–– Broad acceptanceBroad acceptance

–– Follow on to the widely accepted MiniFollow on to the widely accepted Mini--USBUSB

Mechanically suitable for mobile devicesMechanically suitable for mobile devices–– Small sizeSmall size–– Durable (>10,000 cycles)Durable (>10,000 cycles)–– Improved LatchingImproved Latching

Replaces multiple other connectorsReplaces multiple other connectors–– Data, charging, audio, video, diagnosticsData, charging, audio, video, diagnostics

Future lookingFuture looking–– Features designed for USB 2.0 will map to USB 3.0Features designed for USB 2.0 will map to USB 3.0

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USB Battery ChargingUSB Battery ChargingMobile device charges from host:Mobile device charges from host:–– Charge at 500mA on todayCharge at 500mA on today’’s PCs and hubss PCs and hubs–– Charge at 1.5A on future host chargersCharge at 1.5A on future host chargers–– Dead battery charging without enumerationDead battery charging without enumeration

Mobile device charges from USB charger:Mobile device charges from USB charger:–– Dedicated lowDedicated low--cost USB charger designcost USB charger design–– Charge at up to 1.5 ACharge at up to 1.5 A

Mobile device charges from docking station:Mobile device charges from docking station:–– Mobile device acts as hostMobile device acts as host–– Charges instead of having to provide power to Charges instead of having to provide power to

downstream devicesdownstream devices

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USB On-The-GoUSB On-The-GoOTG enables portable devices to OTG enables portable devices to communicate directly with USB peripherals or communicate directly with USB peripherals or each othereach other

OTG enables efficient power management of OTG enables efficient power management of the portable interfacethe portable interface

Devices that need to attach to PCs and other Devices that need to attach to PCs and other accessories can do both over the same accessories can do both over the same connectorconnector

Enables high volume, low cost accessories by Enables high volume, low cost accessories by standardizing the interface between device standardizing the interface between device and accessoryand accessory

New devices and accessories can be New devices and accessories can be developed with the same interfacedeveloped with the same interface

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USB Audio HeadsetUSB Audio Headset–– Audio Headset group defining a standard interface Audio Headset group defining a standard interface

between a phone and a USB digital headsetbetween a phone and a USB digital headset

–– Headsets will have a basic set of features that will Headsets will have a basic set of features that will work with all compliant phoneswork with all compliant phones

–– Headsets can support additional features for Headsets can support additional features for advanced functions. For example, additional advanced functions. For example, additional display or buttons for audio player functions.display or buttons for audio player functions.

–– Extremely low USB current consumptionExtremely low USB current consumption

–– Phones with USB headset support do not need a Phones with USB headset support do not need a 2.5mm jack2.5mm jack

–– USB headset is a low cost/power alternative to BTUSB headset is a low cost/power alternative to BT

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USB Video DisplayUSB Video DisplayDisplay connectivity (e.g. HDTV)Display connectivity (e.g. HDTV)–– USB Embedded Host in display will support USB Embedded Host in display will support

video classvideo class–– Widely recognised USB connectivityWidely recognised USB connectivity–– UI control in mobile device or displayUI control in mobile device or display–– Display charges mobile peripheralDisplay charges mobile peripheral

Best user experience: Digital clear Best user experience: Digital clear audio and videoaudio and video–– Up to HDTV quality video sharingUp to HDTV quality video sharing–– HiHi--resolution photo, combined with digital resolution photo, combined with digital

musicmusic–– ChargingCharging

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USB Embedded HostUSB Embedded Host–– Enable connectivity between USB Enable connectivity between USB

devices without going through PCdevices without going through PC

–– Embedded host ports:Embedded host ports:

Have a specific set of supported features. Have a specific set of supported features. Do not need all the functionality of a PC.Do not need all the functionality of a PC.

Have a specific set of supported Have a specific set of supported peripherals. Targeted peripheral listperipherals. Targeted peripheral list

–– Examples include USB host ports on:Examples include USB host ports on:

Car stereos, video displays, set top boxes, Car stereos, video displays, set top boxes, printersprinters

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Industry Support for USB in Portable DevicesIndustry Support for USB in Portable Devices

Open Mobile Terminal Platform (OMTP) forum has endorsed Open Mobile Terminal Platform (OMTP) forum has endorsed MicroMicro--USB as the standard connector for portable cell USB as the standard connector for portable cell phonesphones

China Electronics Standardization Institute (CESI) is looking China Electronics Standardization Institute (CESI) is looking at requiring all portable cell phones to use the Microat requiring all portable cell phones to use the Micro--USB USB connector for its charging portconnector for its charging port

USBUSB--IF has launched a number of standards and compliance IF has launched a number of standards and compliance efforts to optimize and enhance USB for the portable market, efforts to optimize and enhance USB for the portable market, and is committed to addressing new requirements as they and is committed to addressing new requirements as they emergeemerge

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Portable Device MigrationPortable Device Migration

TodayToday’’s Handset is a PC and then somes Handset is a PC and then some–– MultiMulti--gigabyte memory capacitygigabyte memory capacity–– Multiple processors and coMultiple processors and co--processorsprocessors–– Multiple wireless interfaces (CDMA, GSM, UMTS, Multiple wireless interfaces (CDMA, GSM, UMTS, WiFiWiFi, GPS, FM), GPS, FM)–– Digital Still and Video camera functionsDigital Still and Video camera functions–– Multi Media PlayersMulti Media Players–– Full function OS (Full function OS (WinMobileWinMobile, , SymbianSymbian, Linux), Linux)–– Desktop equivalent applications (Word, Desktop equivalent applications (Word, PowerpointPowerpoint, Excel, Outlook), Excel, Outlook)

Just as Just as PCPC’’ss benefit from a standard wired interface, so will portable benefit from a standard wired interface, so will portable devicesdevices

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