Is there any NFC chip that is capable of emulation NFC-V Tags?

[kahlenberg]

Hi,

Is there any NFC chip that is capable of emulation NFC-V Tags (ISO 15693)?

Thanks.

[Ulysses HERNIOSUS]

Hi kahlenberg,

I am not aware of any NFC reader chips being able to emulate NFC-V - neither in ST portfolio nor competition.

ST25DV is maybe something interesting for you - not exactly doing card emulation but at least offering ways to exchange data from an MCU through the ST25DV with another MCU behind an NFC reader chip.

BR, Ulysses

[Ulysses HERNIOSUS]

Hi kahlenberg,

as hinted by @Brian TIDAL1 : Flipper Zero uses ST25R3916 to even emulate T5T. 

But it does that by going really low level on the transparent mode. I don't have the details of the Flipper Zero but typically such an implementation would use the a feedback of the MCU_CLK into the MCU to generate a timing accurate modulation signal on a GPIO pin and sample the reader modulation on another GPIO.

BR, Ulysses

[Brian TIDAL]

Hi kahlenberg,

see https://github.com/flipperdevices for Flipper Devices open source projects. 

Rgds

BT

[kahlenberg]

Yes, exactly I would post this link :) flipperzero has a support for NFC-V Emulation with ST25R3916 (https://github.com/flipperdevices/flipperzero-firmware/commit/6e3f50d7e658e19d5801684fe840b5ef82695dad).

But in specification page of the ST25R3916 it is mentioned "NFC-A / NFC-F card emulation" not NFC-V. How is it possible?

Thanks.

[Ulysses HERNIOSUS · Accepted solution]

Hi kahlenberg,

as said: "Transparent mode": Almost completely bypass the digital logic (framing, CRC, timings, ...) and just use ST25R3916 as low level front-end. Just look for this term in the DS.

Ulysses