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Does TRF7970A support ISO 15693 card emulation?

Kai-Jung Shih
Intellectual 730 points
Other Parts Discussed in Thread: TRF7970A, RF430FRL152H, DLP-7970ABP, RF430CL330H, MSP430G2553

Dear TI teams,

Does TRF7970A support ISO 15693 card emulation?
I cannot found the ISO 15693 selection on "Host-based card emulation" -> "Mode".

If the NFCLink did not support, how can I do for ISO 15693 card emulation?

THX.

B.R.

KJ

  • 0
    TI__Expert 3550 points

    Hello Kai-Jung,

    The TRF7970A supports Card Emulation for ISO14443A and ISO14443B when using Direct Mode 2.

    If you use Direct Mode 0, you will be able to decode the 15693 reader commands. However, with this mode you will have to decode and encode all the commands / responses with the MCU. The FIFO is not available when you are using this mode.

    Best regards,

    Erick M.

  • 0 in reply to Erick Macias
    Intellectual 730 points

    Dear Erick,

    In slos743 (TRF7970A datasheet) pp. 11, we should set the ASK/OOK(12), MOD(14), and I/O_6(23) pin for Direct Mode 0, right? Or I should setting more?

    Do you have sample codes for ISO15693 Card Emulation?

    Erick Macias said:

    If you use Direct Mode 0, you will be able to decode the 15693 reader commands.

    What the effect of "FIFO is not available", and what I should cared about?

    Erick Macias said:

    However, with this mode you will have to decode and encode all the commands / responses with the MCU. The FIFO is not available when you are using this mode.

    B.R.

    KJ

  • 0 in reply to Kai-Jung Shih
    TI__Expert 3550 points

    Hello Kai-Jung,

    We do not have sample code for emulating a ISO15693 tag on the TRF7970A.

    The decoder of the TRF7970A only decodes incoming commands for ISO14443A, ISO14443B, or ISO18092 reader commands. When Direct Mode 2 is enabled the decoder completes decoding the incoming command, it places the received data inside the FIFO. In the case of ISO15693 we need to use Direct Mode 0, the MCU must decode the data with a software implementation.

    Please read section 6.10.6 of the TRF7970A datasheet for more information on the supported Direct Modes and how to enable them.

    TRF7970A datasheet link: http://www.ti.com/lit/gpn/trf7970a

    Hope this helps!

    Best regards,

    Erick M.

  • 0 in reply to Erick Macias
    TI__Guru* 91206 points

    Kai-Jung - 

    in addition to Erick's advice, one thing more here is that while emulating an ISO15693 tag, you will most likely not be able to respond to requests which are commanding (via the request flags) you to reply with double subcarrier - this may or may not be a big deal to you, as most ISO15693 applications only are requiring the use of the tag response on single subcarrier frequency.

    I am curious, too - what is your application? some other folks have also asked us about this, and they are doing manufacturing test equipment for RFID or NFC readers - is this same thing what you are needing this for or something else? 

  • 0 in reply to Josh Wyatt
    Intellectual 730 points

    Dear Josh,

    Thanks for your help. But I don't know what  and how double subcarrier? Can you tell me more?

    Josh Wyatt said:

    you will most likely not be able to respond to requests which are commanding (via the request flags) you to reply with double subcarrier - this may or may not be a big deal to you, as most ISO15693 applications only are requiring the use of the tag response on single subcarrier frequency.

    We have designed and used a special-purpose RFID tag by using ISO 15693 for a long time. Now we want to design another feature but combine the old function. So we want to use ISO 15693 Card Emulation mode for the TRF7970A.

    B.R.

    KJ

  • 0 in reply to Kai-Jung Shih
    TI__Guru* 91206 points

    if you are not using it and you have closed loop system - then maybe its OK - the ISO15693-2 standard requires the VICC (this is the acronym used for the tag) support responding with either a single subcarrier or dual subcarrier, based on the request flags from the VCD (acronym for the reader)

    single sub-carrier load modulation frequency for ISO15693 VICC is fc/32 (423.75kHz)

    double sub-carrier load modulation frequencies for ISO15693 VICC are fc/32 (423.75kHz) and fc/28 (484.28kHz)

    double sub-carrier is primarily only needed/used in noisy environments - its noise immunity is not as good as BPSK response (like what is used in ISO14443B) but is better than single (like what is used in ISO14443A and single subcarrier ISO15693) 

    maybe you don't need it. 

  • 0 in reply to Josh Wyatt
    TI__Guru* 91206 points

    other thing you might consider (based on your timing) is using a device like the RF430FRL152H. It is a programmable ISO15693 transponder, with sensor interface. 

  • 0 in reply to Erick Macias
    Intellectual 730 points

    Dear Erick,

    Can MSP-EXP430G2 + DLP-7970ABP do direct mode 0?

    Since the DLP-7970ABP User's Guide -> 4.0 MODULE DESCRIPTION (p.2) tell us "and it supports slave select, TRF7970A Direct Mode 2 (default), Direct Mode 1 and Direct Mode 0 operations."

    But in 5.0 MODULE PINOUT (p.3), I can not find the ASK/OOK(12), MOD(14), and I/O_6(23) pins for Direct Mode 0. And the TRF7970A datasheet (p.11) tell us we need this three pins.

    What part I lost. And how can I start it?

    B.R.

    KJ

  • 0 in reply to Kai-Jung Shih
    Intellectual 905 points

    KJ -

    The MOD pin is brought out from the TRF7970A to pin 11 of the RFID2 module (close to pin 10 of the BoosterPack header).  It is connected to the ground plane on the bottom side of the BoosterPack but you should be able cut the connection with an exacto knife.  From there, you can run a jumper wire to an available IO pin on the LaunchPad on the top of the BoosterPack.

    Hope this helps.

  • 0 in reply to Don Powrie
    TI__Guru* 91206 points

    here is graphic representation of Don's explanation

     

  • 0 in reply to Josh Wyatt
    Intellectual 730 points

    Dear Josh,

    Thanks for the suggestion of RF430FRL152H. But I can not find the RF430xxx15xH Family User’s Guide (SLAU419) mentioned in RF430FRL152 datasheet. Can you send me a copy.

    Further, I can not find experiment board of RF430FRL152H. Does RF430CL330H + MSP430G2553 equal to RF430FRL152. If the answer is yes, that means I can use DLP-RF430BP + MSP-EXP430G2 for Card Emulation of ISO 15693?

    THX.

    KJ

  • 0 in reply to Kai-Jung Shih
    TI__Expert 7820 points

    The RF430FRL152H device is currently not available and also its Family User's Guide.

    It is expected to be released around the end of the 2014 year.

  • 0 in reply to Don Powrie
    Intellectual 730 points

    Dear Don,


    Very thanks for your help.

    Did I just need the add of MOD pin and then run MSP-EXP430G (G2553) and DLP-7970ABP in Direct Mode 0?

    Or I need some other pins?

    Thanks,

    B.R.

    KJ