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Near Field Communication (NFC)

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As interest in NFC from the car industry is swiftly gathering pace, the near future will see this technology
being gradually adopted in the car for a more convenient and a customized user experience.

NFC communication involves an initiator and a target. In order to transmit data between two NFC interfaces, If an NFC interface is located close to a compatible RFID reader, the NFC interface adopts the roll of an NFC target For data transmission between the NFC interfaces, the amplitude of the emitted alternating field is modulated, (ASK modulation). The transmission direction is reversed in order to send data from the NFC target to the NFC initiator.
If an NFC interface is located close to a compatible RFID reader, the NFC interface adopts the roll of an NFC target and can transmit data to the reader using load modulation. This mode is called “card emulation mode”.

An NFC interface is also able to communicate with compatible passive transponders that the interface can supply with power and that via load modulation can transmit data back to the NFC interface. In this case, the NFC interface adopts the roll of an RFID reader.

It is possible to use NFC for car access if a reader is installed in a way that it is accessible from outside the car
(e.g. located in the side mirror). Particularly this is helpful for car sharing communities or other cases
where different people have access to a number of cars (e.g. car fleet of the company).

The MLX90132 was designed and qualified for automotive systems making it also robust and durable in retail, consumer and industrial NFC applications.

NFC for car access and sharing

MLX90132 Automotive 13.56MHz NFC / RFID Transceiver
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