nfc report

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Seminar Report ’08 1 Near Field Communication 1. INTRODUCTION Near Field Communication or NFC is a short-range high frequency wireless communication technology which enables the exchange of data between devices over about a 10 centimetre (around 4 inches) distance. The technology is a simple extension of the ISO 14443 proximity-card standard (contactless card, RFID) that combines the interface of a smartcard and a reader into a single device. An NFC device can communicate with both existing ISO 14443 smartcards and readers, as well as with other NFC devices, and is thereby compatible with existing contactless infrastructure already in use for public transportation and payment. NFC is primarily aimed at usage in mobile phones. Near-field Communication (NFC) is characterized as a very short-range radio communication technology with a lot of potential, especially when applied to mobile handsets. Imagine yourself using your cell phone to interact with posters, magazines, and even with products while at the store, and with such interaction initiating a request or search for related information in real-time. Other usages of NFC include the electronic wallet to make payments using your handset, the same way you do with your credit card. With NFC all this is possible. But NFC is still a young technology. That said, NFC-enabled handsets are being introduced into the market, and deployments and pilots around the world are Dept. of Electronics & Communication Govt. Engineering College, Thrissur

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Page 1: Nfc Report

Seminar Report ’08 1 Near Field Communication

1. INTRODUCTION

Near Field Communication or NFC is a short-range high frequency wireless

communication technology which enables the exchange of data between devices over about

a 10 centimetre (around 4 inches) distance. The technology is a simple extension of the ISO

14443 proximity-card standard (contactless card, RFID) that combines the interface of a

smartcard and a reader into a single device. An NFC device can communicate with both

existing ISO 14443 smartcards and readers, as well as with other NFC devices, and is

thereby compatible with existing contactless infrastructure already in use for public

transportation and payment. NFC is primarily aimed at usage in mobile phones.

Near-field Communication (NFC) is characterized as a very short-range radio

communication technology with a lot of potential, especially when applied to mobile

handsets. Imagine yourself using your cell phone to interact with posters, magazines, and

even with products while at the store, and with such interaction initiating a request or search

for related information in real-time. Other usages of NFC include the electronic wallet to

make payments using your handset, the same way you do with your credit card. With NFC

all this is possible. But NFC is still a young technology. That said, NFC-enabled handsets

are being introduced into the market, and deployments and pilots around the world are

occurring. This report explores NFC and how you can leverage it in your Java application

by using the Contactless Communications API.

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2. TECHNOLOGY FOCUS

Near Field Communication is a standards-based, short-range wireless connectivity

technology that enables convenient short-range communication between electronic devices.

The underlying layers of NFC technology are ISO, ECMA, and ETSI standards. NFC

applications can be split into the following four basic categories:

1. Touch and Go: Applications such as access control or transport/event ticketing, where

the user needs only to bring the device storing the ticket or access code close to the

reader. Also, for simple data capture applications, such as picking up an Internet URL

from a smart label on a poster.

2. Touch and Confirm: Applications such as mobile payment where the user has to

confirm the interaction by entering a password or just accepting the transaction.

3. Touch and Connect: Linking two NFC-enabled devices to enable peer to peer transfer of

data such as downloading music, exchanging images or synchronizing address books.

4. Touch and Explore: NFC devices may offer more than one possible function. The

consumer will be able to explore a device's capabilities to find out which functionalities

and services are offered.

NFC STANDARDS

NFC is a standard, and is ISO standards-based. The ISO 14443 Type A and

Type B standards + FeliCa is a four-part international standard for contact-less smart cards

operating at 13.56 MHz in close proximity with a reader antenna. The ISO 18092 standard

defines communication modes for NFC Interface and Protocol.

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3. MODES OF COMMUNICATION

NFC has three modes of communication

Peer-to-Peer mode is defined for device to device link-level communication. Note that this

mode is not supported by the Contactless Communication API.

Read/Write mode allows applications for the transmission of NFC Forum-defined

messages. Note that this mode is not secure. This mode is supported the Contactless

Communication API.

NFC Card Emulation mode allows the NFC-handset behave as a standard Smartcard. This

mode is secure. This mode is supported by the Contactless Communication API.

Fig. 3.1 Modes of communication

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4. TERMINOLOGY

NDEF - NFC Data Exchange Format - standard exchange formats for URI, Smart Posters etc.

The NDEF specification describes a common data exchange format for NFC Forum-

compliant devices and NFC Forum-compliant tags. It contains the rules for constructing a

valid NDEF message as an ordered and unbroken collection of NDEF records. Additionally,

it defines the mechanism for specifying the types of application data encapsulated in NDEF

records.

RTD - Record Type Definition - An NFC-specific record type and type name which may be

carried in an NDEF record. RTD provides guidelines for specifying well-known record

types for inclusion in NDEF messages exchanged between NFC Forum-compliant devices,

and between NFC Forum-compliant devices and tags.

NDEF message - Basic message construct defined by this specification. An NDEF message

contains one or more NDEF records

NDEF record - Contains a payload described by a type, a length, and an optional identifier.

NDEF payload - The application data carried within an NDEF record.

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5. THE CONTACTLESS COMMUNICATION API

The Contactless Communication API Java specification, led by Nokia and defined under

the Java Community Process as JSR-257, defines a set of APIs for proximity, contactless-

based communication. The API consists of five Java packages, as follows:

java package Interfaces Classes Exceptions

javax.microedition.contactless

A mandatory package that contains all the target discovery and classes common to all targets

Tag Connection

Target Listener

Target Properties

Transaction Listener

Tag Connection

Target Listener

Target Properties

Transaction Listener

Contactless Exception

javax.microedition.contactless.ndf

An optional package for communicating with NDEF formatted data tags

NDEF Record Listener

NDEFTagConnection

NDEF Message

NDEF Record

NDEF Record Type

javax.microedition.contactless.rf

An optional package for communicating with RFID (no NDEF formatted data) tags

Plain Tag Connection

javax.microedition.contactless.sc

An optional package for communicating with external smartcards

ISO14443Connection

javax.microedition.contactless.visual

An optional package for reading and generating visual tags

Image Properties

Visual Tag Connection

Symbology Manager

Visual Tag Coding Exception

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5.1ANATOMY OF A CONTACTLESS API MIDlet

Let's now cover the elements of a typical mobile Java application (MIDlet) that uses the

Contactless Communication API looks. This is illustrated next where we have the following

typical elements:

1. The Java Runtime with JSR-257 implementation,

2. The MIDlet application running on a handset,

3. RFID/NFC transponder, controllers, and baseband,

4. A SIM card, as well as secure and external elements.

Fig 5.1 Anatomy of a contactless API MIDlet

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External Readers

External readers include contactless payment readers in Point of Sale

stations, ticketing systems on transportation systems, external radio, visual tags such as

NFC, RFID and barcodes, or Smartcards.

Secure Elements

Secure elements (SE) can be internal or external elements; example of a

secure element is a Java Card-based smartcard. MIDlets can access secure elements by

using the Security and Trust Services API (SATSA), and/or the Contactless

Communication API (JSR 257). External readers access internal secure elements directly

via the RFID circuitry (using the Card Emulation mode).

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6. COMPARISON WITH EXISTING TECHNOLOGIES

THE PRESENT USAGES OF CONTACTLESS TECHNOLOGIES

Bluetooth wireless technology was designed to replace cables between cell phones, laptops,

and other computing and communication devices within a 10-meter range.

Wi-Fi technology was designed and optimized for Local Area Networks (LAN); it provides an

extension or replacement of wired networks for dozens of computing devices within a +100-

meter range.

ZigBee wireless technology is a standard enabling control and monitoring capabilities for

industrial and residential applications within a +100-meter range.

IrDA is a short range (< 1 meter), line-of-sight communication standard for exchange of data

over infrared light. IrDA interfaces are frequently used in computers and mobile phones.

RFID (Radio Frequency Identification) is an automatic identification method, relying on

storing and remotely retrieving data using devices called RFID tags. An RFID tag is a small

object that can be attached to or incorporated into a product. RFID tags contain silicon chips

to enable them to receive and respond to queries from an RFID reader/writer.

Contactless smart cards incorporate a chip (microprocessor) that communicates with a card

reader through RFID technology. Examples of contactless smart card communications are

ISO/IEC 14443 and FeliCa, which allow communications at distances up to 10 cm.

Although there is always room for more wireless technology, on one hand, some

argue that introducing a new standard, such as NFC, alongside 802.11 and Bluetooth may

prove to be an uphill battle. On the other hand, some would argue that they do not think

NFC really steps on Bluetooth or Wi-Fi. They simply do not see NFC being used to

download pictures from digital cameras, or as a WLAN. NFC is demonstrably too slow. At

212 kilobits per second, NFC’s data rate is nearer a 55K modem than the 1- or 7-Mbps

speeds of either Bluetooth or Wi-Fi.

And, both Sony and Philips have 802.11 and Bluetooth products, with each

insisting the NFC standard would complement the more established wireless networks. Like

VDC these market leaders believe there is room for a simple, less-expensive solution. In

fact, with the ever-increasing complexity and cost of adding Wi-Fi and Bluetooth, price

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could become a major deciding factor for OEMs and manufacturers. NFC reportedly would

cost 20¢ per chip. Bluetooth is expected to drop to $4-5 per radio. If the promise of

affordable chips is realized, NFC technology could be effectively leveraged in the near-to-

mid term for payment and security/access applications.

Along with affordability, ‘power drain’ issues have become of utmost

importance within 802.11 and Bluetooth markets. By using a chip, rather than a battery,

NFC hopes to stand out against the rest. As a result, VDC sees NFC-enabled devices

connecting myriad un-powered items such as RFID tags and smart-cards within the next

three to five years.

Others, however, are quick to dismiss any notion of NFC being a giant killer.

While Bluetooth and Wi-Fi have a range anywhere between 33-300 ft, NFC deals in inches.

Table 6.1 Comparison of NFC with existing technologies

7. FUNCTIONING

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Many products and devices will soon be NFC enabled, including credit

cards as well as train tickets. But the mobile handset is the first target for NFC applications.

Operators are the primary customers for handsets and, therefore, are the gatekeepers who

will decide when NFC is to be integrated into the handsets they subsidize for their

customers. Since new technologies always need to develop new markets, the industry needs

to create high consumption volumes in order to reduce the cost of NFC implementation to

mobile handsets. Currently, an NFC equipped mobile costs around an additional $20 to $25

per unit, so wireless operators need to secure revenues in return for their investment.

Yet, mobile operators do seem increasingly positive that NFC will bring new

revenues. The increasing interest in NFC technology is shown by the rising number of

members of the NFC Forum Association. While it had just 4 members in 2004, it now has

over 130, coming from a broad range of backgrounds: manufacturers, applications

developers, financial services institutions, and more, all working together to promote the use

of NFC technology in consumer electronics, mobile devices, and PCs. Such a wide group of

business and technology experts is essential. The future applications are very diverse, and

they need to be shaped by professionals from many fields to assess the best operational

standards in order to ensure seamless interoperability between devices and a good level of

security for users.

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Fig 7.1 Functioning of NFC enabled devices

As a sign of the times, all major handsets manufacturers are developing

NFC handsets used in field trials and early commercial launches: Nokia, LG, Samsung,

Motorola, Sagem. NTT DoCoMo has used the FeliCa contactless technology, which is now

embedded in about 80% of the phones sold by NTT DoCoMo in Japan. There are no great

technological or cost barriers for NFC to be integrated quickly into a wide range of devices -

unlike cameras or Bluetooth, which were first restricted to high-end devices.

7.1 MODES OF OPERATION OF THE NFC

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7.1.1 ACTIVE MODE : In this mode both the initiator and the target are using their own

generated RF fields to enable communication.

7.1.2. PASSIVE MODE:

In this mode the target answers to the initiator command in a load

modulation scheme. The initiator generates the RF field.

7.2 THE NFC SIGNAL INTERFACE

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The specification of signal interfaces for different communication transfer speeds:

Modulation

Bit- representation and coding

Fig 7.2.1: Signal Interface

7.3. USING CONTACTLESS COMMUNICATION API

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The Contactless Communication API allows you to discover and exchange

data with supported contactless radio and visual targets (tags). Applications using the

Contactless Communication API typically follow the flow illustrated next:

Fig 7.3.1 Flowchart showing the flow of Applications using the Contactless Communication API

NFC technology has many dimensions, but two are essential to enabling all of

these potential applications on mobile handsets: security and the user interface. Of course,

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since markets around the world operate in different ways, there are also numerous options to

enable these variations to be addressed. In the NFC standards, security is managed by a

“secure element” (SE). The SE shares mobile functionality with the NFC chipset, which

manages communications. The SE hosts the fire walled applications and user credentials,

and controls security and cryptography using an onboard microprocessor and software.

There are three ways to implement the SE:

In the SIM. This has the advantage of portability, and is the preferred approach in GSM

countries; it is recommended by GSMA and supported by a standard for communication

between SIM and NFC chipset, the Single Wire Protocol (SWP), which was invented by

Gemalto and is now standardised at ELSI.

Embedded SE component. This is a separate chipset in the handset. Its principal advantage is

that it is convenient for CDMA handset manufacturers to implement quickly because it doesn’t

require any standardization between the NFC chipset and SE. 

A removable SE component. This is a theoretical approach to create a removable separate

chipset in the handset; there are no standards and no concrete implementations.

7.4 HARDWARE & BASICS

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NFC Device A device featuring different operating modes based on RF technology.

There are three modes: tag emulation (PICC), NFC peer to peer (NFC) and reader/writer

mode (PCD). NFC Devices must implement at least mandatory parts of the NFC Protocol

Stack. The NFC Devices' operating modes are defined by the NFC Forum.

NFC Near Field Communication: A communication technology standardized in ISO

18092 and ETSI allowing bidirectional communication between two devices based on RF

technology. This is also refereed as the peer to peer (P2P) mode of NFC devices.

RFID Radio Frequency Identification: technology used to identify objects carrying

RF transponders. NFC and RFID technology have overlapping standards and terminology.

PCD Proximity coupling device: a transmitter that can read tags based on ISO14443

(PICC). The reader emits an electromagnetic field that powers a tag/transmitter by

inductivity. Communicates with PICC using load modulation scheme.

PICC Proximity inductive coupling card: a transponder that can be read or written by

a proximity reader. Theses tags are based on the ISO14443 standard. Such tags do not have

a power supply like a battery, but are powered by the electromagnetic field of the reader

(PCD)

8. ADVANTAGES AND DISADVANTAGES

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8.1 ADVANTAGES:

1. Highest convenience for the user, due to intuitive usage by simply holding two devices close

to each other

2. Complementary to existing wireless technologies

3. Interoperable with compatible RFID systems at 13.56 MHz

4. Allows communication, both between two powered devices and between powered and

passive devices.

5. Reduced cost of electronic issuance. Multi-issue ticketing operators like mass transport

operators or event ticketing operators see phenomenal cost reductions in electronic ticketing.

Security-sensitive airlines have already moved to "e-ticketing" in order to reduce costs.

6. Increased revenue from interactive services. Mobile network operators and content

providers earn revenue when users choose to use value added services. NFC surrounds the

user with advertisements and valuable information within easy reach.

7. NFC-enabled devices drive consumption of rich media content. NFC will fuel the market for

advanced personal devices that consumers use to purchase, play, store, and share rich media

content.

8. Consumer preference for NFC-enabled services. Users may have no choice about which

ticket they use for a service, but they typically can choose how they pay. Convenience is a

strong differentiator and more convenient payment will drive adoption of contactless and

NFC technology.

8.2 DISADVANTAGES:

1. The system has the limitation that it can be operated only with devices under a short range

i.e., around 10 cm.

2. The data transfer rate is very less at about 106kbps, 212 kbps and 424kbps.

3. Costly implementation on the electronic basis.

9. APPLICATIONS

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NFC opens up myriad new opportunities. It will enable people to

effortlessly connect digital cameras, PDAs, video set-top boxes, computers and mobile

phones. With NFC it is possible to connect any two devices to each other to exchange

information or access content and services—easily and securely. Solution vendors argue that

NFC’s intuitive operation makes it particularly easy for consumers to use, while its built-in

security makes it ideal for mobile payment and financial transaction applications. However,

NFC-enhanced consumer devices are also targeted at applications that exchange and store

personal data such as messages, pictures, and MP3 files.

Applications for NFC are broad reaching, and the potential to support

multiple applications via NFC exists. Consequently VDC has grouped NFC-related

applications into three basic categories:

Short-range, near-contact mobile transactions and applications such as access

control or transport/event ticketing, where the NFC-enabled device storing the access code

or ticket is presented near a reader. Mobile payment called m-commerce and applications

where the customer must confirm the financial transaction by entering a password or simply

accepting the interaction. Also included are applications requiring simple data capture such

as picking up an Internet URL from a smart label on a poster and advertisement;

Short-range, near-contact linking transactions–connecting two NFC-enabled

devices to enable a P2P transfer of data such as downloading music, exchanging images or

synchronizing address books; and

In order to provide a more complete understanding of the real-world potential

for NFC, here are some example applications for NFC-enabled devices to consider:

In addition to facilitating contactless smart-card-based transactions, emerging

cell-phone multimedia capabilities could be leveraged to support NFC transactions such as

the purchase and download of games, music, MP3 files, videos, software, and other files to

NFC-enabled handheld devices by touching NFC-enabled computers;

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Consumers are able to make online travel reservations using a PC and download

reservations and/or tickets to a cell phone or PDA by bringing the mobile device in close

proximity to the computer and checking-in for the trip or hotel stay by touching the

handheld device to the terminal or kiosk at the departure gate or check-in station. No

printing of documents, such as tickets and hotel receipts, is required;

Posters, signs, and advertisements with RFID transponders can be scanned/read

using an NFC-enabled device to download more information, make a purchase, such as

paperless event tickets, and store other pertinent electronic data;

Pictures can be taken using an NFC-enabled cell phone with an integrated

digital camera. The device could then be presented/touched to a NFC-enabled television,

kiosk, computer, and others, to transmit images for display and/or printing; and

In conjunction with another wireless technology that may provide longer range

and greater bandwidth, large files can be transferred between two devices, such as a laptop

and a desktop, simply by touching the two NFC-enabled devices together.

Moreover, the increased use of mobile services benefiting from synergies with

NFC is becoming more apparent. By integrating NFC applications with existing mobile

services, mobile operators could secure new revenue opportunities by:

Applying service charges for adding value to the electronic cash value stored on a

mobile phone via a mobile service.

What about NFC and the potential for ‘theft by RF?’ First, the relatively short

read range gives customers control over NFC and the applications. NFC-enabled devices

add another level of security over the traditional smart-card, as it can be powered on/off or

include a pass code or voice biometric code for higher-volume transactions. For applications

that require tighter security and perhaps anti-counterfeiting measures, chips can be used to

store biometric information for identification.

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10. DEVICES THAT USES THE NFC TECHNOLOGY

A wide range of devices and machines are likely to become NFC enabled. Here are some examples:

1. Mobile phones:

NOKIA 6131NFC: The Nokia 6131NFC (clam cell) is commercially available since

Q1/2007. The SDK for J2ME application is available for free. The phone itself supports

Tag-Emulation with Mifare and JCOP, as well as the Reader/Writer and the NFC Peer-to-

Peer mode. The SDK provides a full JSR257 implementation and a subset of JSR177. The

NFC controller inside is from NXP whereas the SE is a G&D (Venyon) one. (Phones +

J2ME and SE-SDK available to NFC-Research)

NOKIA 3220: The Nokia 3220 (brick + cover) was the first NFC handset available

commercially. NFC module was integrated in the removable cover of the cell phone. There

are different editions of the cover: one with a secure element and one without. The SDK

for the NFC and SE functionality is not available to public. The SDK has a basic

implementation of the JSR257 and a proprietary implementation for the SE access. The

NFC platform inside the phone comes from NXP. (Phones + J2ME and SE-SDK available

to NFC-Research)

WIRELESS DYNAMICS Inc. SDiD1020: The WDI SDiD1020 is an SDIO Card

providing NFC functionality for PDA with a Windows Mobile operating system. The SD-

Cards come with a propriatary API for Tag-Emulation, R/W-Mode as well as P2P. The IC

in the SD-Card are a product of NXP. (SD-Card + SDK available to NFC-Research)

SAMSUNG SGH-X700n: The Samsung SGH-X700n (brick) is the NFC edition of the

SGH-X700 phone. The phone comes with a NXP NFC platform inside, allowing all three

operating modes (P2P, R/W, Tag). The SDK is proprietary. This phone is used for the trial

in Hagen berg. (Phones + J2ME and SE-SDK available to NFC-Research)

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2. Turnstiles

3. Vending machines

4. Parking meters

5. Check-out cash registers or "point-of-sale" equipment

6. ATMs

7. Office, house and garage doors

8. Personal computers

9. Posters, street signs, bus stops, local points of interest (with NFC-readable tags only)

10. Product packaging

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11. CONCLUSION

Many products and devices will soon be NFC enabled, including credit cards

as well as train tickets. But the mobile handset is the first target for NFC applications which

are already implemented in a successful manner. Operators are the primary customers for

handsets and, therefore, are the gatekeepers who will decide when NFC is to be integrated

into the handsets they subsidize for their customers.

When compared to the other short-range radio technologies, NFC is extremely

short ranged and people-centric. Some of the other short-range communication technologies have

similar characteristics, for example RFID, while others are completely different yet

complimentary to NFC; for example Bluetooth and Infrared. A good scenario of such

compliment is the combination of NFC and Bluetooth, where NFC is used for pairing

(authenticating) a Bluetooth session used for the transfer of data.

11.1 FUTURE SCOPE

NFC is based on existing contactless infrastructure around the world that is

already in use by millions of people on a daily basis. NFC is not a fashionable nice-to-have

technology, but actually a technology that makes peoples lives easier – easier to pay for

goods and services, easier to use public transport, and easier to share data between devices.

At the heart of NFC’s benefits is its simplicity of use – holding two objects

together is intuitive for everyone, young or old. NFC is building on existing systems and

human actins, so it has a very good chance to be valued and used for many years to come.

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The NFC technology is expected to have a remarkable growth in the coming

years. Almost every mobile handset will have NFC incorporated in it. The figure below

shows the expected growth of NFC devices.

Fig 11.1.1: Expected growth of NFC devices

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12. REFERENCES

[1] http://www.nfc-forum.org

[2] http://www.gemalto.com/nfc.html

[3] http://www. whatis.techtarget.com/nfc.html

[4] http://www. asia.cnet.com/near field communication.html

[5] www.radio-electronics.com/info/wireless/nfc/nfc_overview.php

[6] http://www.controleng.com/index.asp?layout=article& articleid=CA6289218&spacedesc=latest News

[7] http://www.nxp.com/news/content/file_1053.html

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