ST25R3911b vs CLRC663

[mohamed2]

Hi, I am not sure if this is the right place to ask this question.

We are building a new product which requires NFC read/write support, we narrowed our options to one of 2 chips st25r39x and another nxp chip clrc663.

Is there any advantage of using the st25r3911b or 3916 over using clrc663?

We know that clrc663 support natively crypto1, hence we can read and write on widely used mifare classic cards, and of course it will have native support to all other nxp tags such as Ultralight or Desfire, so another question does st25r39x support read/write functionality to desfire and ultralight?

[Ulysses HERNIOSUS]

Hi mohamed2,

All chips of the ST25R39xx family support all frames used by the mentioned three tags (Classic, Desfire, Ulralight). It mainly comes to software support. For the classic ones our software does not implement the crypto1. For the other two our software supports reading/writing them (For Desfire this may require previous formatting as NFC Forum T4T). Other functions can also implemented on those tags - it requires studying the supported commands in their respective data sheets.

Regards, Ulysses

[mohamed2]

Are there any example codes to read and write over Desfire and Ultralight?

[Ulysses HERNIOSUS]

Hi,

all demos which are accessing NDEF on T2T and T4T include support for reading and writing Ultralight and Desfire. Examples are X-CUBE-NFC5, X-CUBE-NFC6, STSW-ST25R-LIB.

Regards, Ulysses