ST25DVxxKC not reachable via I2C (hal timeout)

[theresa]

Hi everyone,

Has anyone experienced issues with the NFC tag becoming unreachable via I2C? During debugging, I noticed a HAL timeout when waiting for the tag's response after setting the address to the EEPROM, static, or dynamic register. Additionally, the NDEF message can't be read, although it can still be read and written via RF as usual.

This issue occurred after multiple reconfigurations and also while an application was running with the normal startup configuration in my code, which includes reading the NDEF, disabling the FTM, and GPO. After replacing the ST25DCxxKC, the microcontroller could access the tag via I2C as normal. Therefore, I suspect the problem lies with the tag rather than the microcontroller.

I have used the ST25DV64KC and the ST25DV16KC with the STM32G071RB.

Best regards,
Theresa

[Maxime_MARCHETTO]

Hello @theresa,

This post has been escalated to the ST Online Support Team for additional assistance.  We'll contact you directly.

Best regards,

Maxime