2016年5月16日星期一

How does NFC card?



Have you ever wondered what makes tap-and-go services like Apple Pay, Google Wallet and NFC card work? As much as it seems like pure magic, it isn't.

So what is it exactly NFC card? Simply put, it's a method of wireless data transfer that detects and then enables technology in close proximity to communicate without the need for an internet connection. It's easy, fast and works automagically.

The tech involved is deceptively simple. Evolved from radio frequency identification (RFID) tech, an NFC chip operates as one part of a wireless link. Once it's activated by another chip, small amounts of data between the two devices can be transferred when held a few centimeters from each other.

No pairing code is necessary to link up and because it uses chips that run on very low amounts of power (or passively, using even less), it's much more power-efficient than other wireless communication types.

At its core, NFC card works to identify us by our enabled cards and devices (and by extension, our bank accounts and other personal info.)

NFC card stocked inside credit cards for contactless payments is nothing new. But a more recent and admittedly more enticing use case for NFC is with your smartphone, which can digitize your entire wallet.

NTAG215 has been developed by NXP Semiconductors as standard NFC tag ICs which is belonging to NFC card Forum Type 2 tag. It is wildly used in mass market applications including retails, gaming and consumer electronics.NTAG213,NTAG215 and NTAG216 generally called NTAG21G21x from now on and they are comply to ISO/IEC14443 Type A.

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