one.NFC Technical summary:
The full name of NFC in English is Near Field Communication, short-range wireless communication. It is a wireless technology initiated by NXP and jointly promoted by well-known manufacturers such as Nokia and Sony. NFC evolved from the integration of non-contact radio frequency identification (RFID) and interconnection technologies, combining inductive card readers on a single chip The sensor, sensor card and point-to-point function can identify and exchange data with compatible devices within a short distance. This technology was originally just a simple merger of RFID technology and network technology, and now it has evolved into a short-range wireless communication technology, and its development trend is quite rapid. NFC has the characteristics of two-way connection and recognition. It works in the 13.56MHz frequency range and has an operating distance of close to 10 cm. NFC technology promotes standardization under the framework of ISO 18092, ECMA 340 and ETSI TS 102 190. It is also compatible with the widely used ISO 14443 Type-A, B and Felica standard contactless smart cards.
NFCThere are three working modes:
● Card Emulation mode
Mobile payment, ticket, channel control, toll station, parking card, etc.
● Peer-to-Peer communication mode
Data exchange: fast, easy and convenient to realize the establishment, configuration and connection of equipment
● Reader mode Content distribution, information access, advertising
two. NFC Technical chip introduction:
Pinjia’s current NXP NFC chips are PN544 and PN65N. PN544 complies with the latest NFC specifications formulated by the European Telecommunications Standards Institute (ETSI), and can provide mobile phone manufacturers and mobile operators with a fully compatible platform for launching next-generation NFC devices and services. PN544 is fully compatible with all currently published NFC specifications that connect the SIM card and the host controller interface (HCI) through the Single Wire Protocol (SWP). In addition, NXP works closely with leading SIM card manufacturers such as Gemalto, Oberthur Technologies and Giesecke & Devrient to ensure the interoperability of SWP interfaces including MIFARE technology. PN65N is PN544 plus NXP’s SMART MX security module. PN544 and PN65N hardware PIN are fully compatible with PIN.
PN544And PN65N has the following advantages.
● Small size, convenient for size optimization
● Low power consumption
● Battery off and low battery working mode
● Optional platform-independent software stack
● Provide GPIO PORT for external unit control
● Interrupt IRQ can make the command communication of the external control unit easier
● Support safety unit control interface
● Integrated power control unit
PN65N / PN544 provides a variety of host interface options to ensure easy integration for mobile phone manufacturers
1. High Speed UART
Support multiple RF interface protocols: ISO14443A/B; ISO15693; MIFARE; Felica
three. NFC Principles of mobile payment:
NFC PN544 / PN65N hardware circuit block diagram:
The NFC Electronic wallet function uses the mobile phone as the transaction platform, and the PN544 NFC controller (PN65N has a built-in security module) and the security module implement mobile payment and data exchange functions.
RF part: NFC radio frequency circuit is composed of EMC filter circuit, matching circuit, receiving circuit and antenna.
EMC circuit: Because the system is based on an operating frequency of 13.56MHz. This frequency is generated by a quartz crystal oscillator. At the same time, high-order harmonics are generated. In order to comply with internal electromagnetic compatibility regulations, the third, fifth, and higher order harmonics of 13.56MHz must be appropriately suppressed. Therefore, the EMC circuit is configured as an LC low-pass filter to filter out high-order harmonics.
Antenna matching circuit, because the antenna coil itself is a low-impedance device, in order to maximize the energy delivered by the NFC IC to the antenna, a matching circuit must be added between the antenna and the NFC IC. Eliminate energy loss caused by signal reflection caused by mismatch.
The receiving circuit is composed of R127, C118, R128, C119, and the Vmid potential generated inside the chip is used as RXIn order to reduce the disturbance of the input potential of the pin, a capacitor must be used to connect Vmid to the ground. The bias voltage of Vmid can increase the voltage drive of Rx pin.
NFC Radio frequency part of the circuit:
NFC and SIM card security module interface circuit, NFC IC with SWP one-line interface can realize data communication with SIM card, its reference circuit is
4. NFC technology application and prospects
NFC devices can be used as contactless smart cards, smart card reader terminals, and device-to-device data transmission links. It has a wide range of applications, and NFC applications can be divided into four basic types. For applications such as access control or traffic/event ticket checking, users only need to bring the device storing the ticket or access code close to the reader. It can also be used for simple data capture applications, such as reading URLs from smart tags on posters.
Contact and confirm. In applications such as mobile payment, the user must enter a password to confirm the transaction, or only accept the transaction.
Contact, connect. By linking two NFC-enabled devices, you can perform point-to-point network data transmission, such as downloading music, exchanging images, or synchronizing contacts.
Contact, explore. NFC devices may provide more than one function. Consumers can explore and understand the functions of the device and find out the potential functions and services of the NFC device.
1. NFCFor smart media
For phones equipped with NFC, using its reader/writer function, users only need to touch the smart media to get rich information or download related content. This smart media is equipped with a low-cost RFID (embedded or attached to a poster) tag, which can be read by a mobile phone to discover the rich and diverse service items in the current environment. And the mobile phone can initiate a mobile network service request and immediately increase the operator’s network traffic proportionally. Operators can invest in this “instant gratification” tool to increase revenue through ringtone downloads, mobile games and other fee-added value-added services.
2. NFCUsed for payment and ticket purchase, etc.
The earliest use of contactless smart cards on mobile phones was to stick the card into the phone. It also does not provide any value-added services through contactless cards, and does not use the functions of mobile phones or the mobile phone network. After improvement, although the contactless smart card is integrated into the phone, it is still a closed system based on traditional smart card deployment. We are now witnessing the trend towards NFC phones, which make full use of mobile phone functions and mobile phone networks, and also provide card readers and device-to-device connections.
Payment methods using contactless smart cards are gaining momentum in the United States and the Asia-Pacific region. The built-in payment programs of credit cards such as Visa, MasterCard and American Express can be safely stored in the secure IC on the device. In this way, NFC phones can make full use of the existing payment infrastructure and can support new service projects for mobile phone companies.
3. NFCFor e-ticket
An electronic ticket is an access right stored electronically, and consumers can purchase this right to gain admission to an entertainment venue. The entire electronic ticket purchase process only takes a few seconds, which is very simple and convenient for consumers. After collecting and confirming the consumer’s payment information, the electronic ticket will be automatically transmitted to the consumer’s mobile phone or security chip.
The user brings the mobile phone close to the automatic ticketing terminal, and the transaction starts. The user fully interacts with the service device, and then confirms the transaction on the mobile phone to complete the purchase process. When going to the entertainment venue, the user only needs to put his mobile phone close to the reader installed on the entrance gate, and the reader is allowed to enter after checking the validity of the ticket.
4. NFCUsed to connect and act as a wireless boot device
Consumers want wireless connections to be simple and convenient, but the convenience and mobility promised to consumers has not yet been fulfilled. Although ease of use has become the main reason for consumers’ preference, safety performance is also a necessary factor.
NFC Mobile applications are far more than just payment functions, their breadth is far beyond our expectations:
NFC has great potential to change consumer behavior and consumption habits, and create new business opportunities for mobile commerce. Its unique and simple operation method makes it particularly convenient for consumers to use, and its security makes it an ideal choice for payment and financial applications. These are the key factors for the popularization of this technology.
NXP expects the future of NFC to be unlimited. Industry analysts also believe that NFC has strong application potential and will be widely used in ticketing applications, music downloads, and many other sales terminals.
NFC can help people exchange various information content between many different devices, such as music, information, photos, video clips, movies, etc., and can also purchase new information content. NFC in mobile phones is our goal-a world where information, entertainment and services can be accessed anytime and anywhere is the key to becoming a reality.
5. Pinjia PN65N / PN544 Demo Board Display:
Fifth, the market prospects of the solution
The current main application products of this solution are smartphones and tablets. In 2012, global smartphone shipments are expected to be 630 million. Mobile phones using the NXP NFC solution are led by mainstream mobile phone manufacturers such as Samsung, and more and more mobile phones Brands are adopting this leading program. With the gradual clarification of domestic mobile payment standards and the adoption of the international standard 13.56Mhz, this solution will have great potential.
Global smartphone shipments exceeded 630 million in 2012 / Data source: DIGITIMES, 2012/7
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