ST25R3916 reading single byte from register not working after putting the device in "Ready mode"

cle_98 · ‎2025-02-24

Hello,

I am working on a project where I need to read the UID of an NFC tag using the ST25R3916 and communicate via I2C. After powering on, I can successfully read single register, but after setting the device to "Ready mode" by setting bit 7 of the Operation Control Register (0x02), I only read zeros, even when attempting to read the FIFO.

Brian TIDAL · ‎2025-02-24

Hi,

I would suggest to use the X-CUBE-NFC6 that provides a demo that reads the UID of a tag. It can use SPI or I2C for the MCU to ST25R3916 communication.

Rgds

BT

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