ST25R3911B and Compliance with ISO15693

[GDeto]

Hello all,

I am trying to understand how to configure the  ST25R3911B to comply with the ISO15693.

In particular I do not understand how to set the Low/High Bitrate.

Looking at the datasheet of the ST25R3911B the Bit Rate Definition Register lowest achievable value is fc/128 while the ISO 15693 goes fc/2048!

I cannot find much of information how to setup the ISO15693 on the datasheet. Is there some other reference, or instructions on how to do so?

Thank you!

Update:

Checked the other questions...

https://community.st.com/s/question/0D50X00009XkWIeSAN/iso-15693-sof-eof-for-st25r3911b

https://community.st.com/s/question/0D50X00009XkWIfSAN/register-settings-for-st25r3911b-for-iso-15693

But it seems that ISO15693 is not inherently supported... So I wonder if it should be mentioned in the specs as it is more like a custom protocol implementation with coding/decoding performed in the external logic and not within the ST25 device among all.

[Ulysses HERNIOSUS · Accepted solution]

Hi,

yes the ST25R3911B does internally implement all of ISO15693-2. Bit coding/decoding and framing needs to be done in SW. ST provides software showing 1of4 high data rate using one subcarrier - e.g. inside X-CUBE-NFC5.

Low data rate is also possible but not supported by this software. More RAM will be required and decoder logic needs to be changed.

Regards, Ulrich