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Week #6: Discussion results. NFC technology and its components. Group #33 Group member: Tianhao Han Ximeng Sun(Susie) Xing Cao(Star) Zhuoran Yang. NFC( Near field communication ). Definition:

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week 6 discussion results

Week #6: Discussion results

NFC technology and its components

Group #33

Group member:

TianhaoHan

Ximeng Sun(Susie)

Xing Cao(Star)

Zhuoran Yang

nfc near field communication
NFC(Near field communication)

Definition:

Near field communication, abbreviated NFC, is a form of contactless communication between devices like smartphones or tablets.

The Near Field Communication (NFC) Forum is a non-profit industry association that promotes the use of NFC short-range wireless interaction in consumer electronics, mobile devices and PCs.

what is nfc
What is NFC ?
  • NFC comes from RFID(Radio Frequency IDentification)
  • NFC have three standard:

FeliCaTM(SONY) ISO14443A, B(Philips)

Type A, Type B, Type F

  • NFC is a set of short-range wireless technologies
  • Operates at 13.56MHz on ISO/IEC 18000-3 air interface and at rates ranging from 106Kbit/s to 424Kbits/s
  • Theoretical working distance with compact standard antennas: up to 20 cm (practical working distance of about 4 centimeters)
how does it work
How does it work ?
  • Involves an initiator and a target
  • Initiator actively generates an RF field that can power a passive target
  • Passive communication mode
  • Active communication mode
application
Application:
  • Access Control: Replacing traditional keys for either physical access (hotel room) or control (starting a car)
  • Ticketing: Replacing paper tickets for social events and public transportation
  • Contactless Payments: Mobile payments debited from financial or MNO linked accounts
  • Interactive World: Marketing and exchange of information such as schedules, maps, business card and coupon delivery using NFC Marketing tags
  • Media Sharing: Transfer images, videos, music between mobile phones
  • Social media e.g. "Like" on Facebook, "Follow" on Twitter via NFC smart stickers in retail stores
slide6

Weakness

  • Security
  • Bit rate is low(only few information can be past in a short time)
  • Short distance
benefits for nfc technology comparing with blue tooth
Benefits for NFC technology (Comparing with blue tooth)
  • Smaller power consumption
  • Simply set up and set-up time is short
  • Security
  • Less cost($2-$3 VS $20)
  • Larger market
key features and benefits for nfc controller
Key features and benefits for NFC Controller
  • Highly integrated transmission modules for contactless communication at 13.56MHz including a microcontroller.
overall
Overall
  • TRF7970A is cheaper and available.
  • TRF7970A’s documentations including datasheet are public/full and available directly without any registration or NDA.
  • Support Direct Mode 0 "Raw RF Sub-CarrierData Stream" to encode/decode all 13.56MHz subcarrier data stream.
  • PN532 has more specific features.
applications

Applications

*Mobile Devices (Tablets, Handsets)

*Secure Pairing(Paired wireless networks)

---------Bluetooth, WIF

*Public Transport or Event Ticketing

*Passport or payment (POS) Reader System

*Short-Range Wireless Communication Tasks (Firmware Updates)

*Product Identification or Authentication

*Medical Equipment or Consumables

*Access Control, Digital Door Locks

*Sharing of Electronic Business Cards

two official suggestion of trf7970a
Two Official Suggestion of TRF7970A
  • Using Parallel Microcontroller Interface
  • Using SPI With SS Mode
general application consideration
General Application Consideration
  • Due to the low clock frequency on the data_clk (pin 26) line, the parallel interface is the most robust way to connect the TRF7970A with the MCU.
general application consideration1
General Application Consideration
  • Schematic shows matching to a 50 Ωport, which allows connecting to a properly matched 50 Ωantennacircuit or RF measurement equipment

For example: a spectrum analyzer or power meter.

general application consideration2
General Application Consideration
  • Systems using the Serial Port Interface (SPI). Short SPI lines, proper isolation of radio frequency lines, and a proper ground area are essential to avoid interference.
  • The recommended clock frequency on the data_clk line is 2 MHz.
structure
Structure
  • There are two parts in NFC technique.

a)NFC analog front-end (one case is NFC Controller with antenna).

b)Security unit. Depending on the application requirements, it can be SIM, SD, SAM or other chips.