Is there errata document available for ST25DV64KC? pb with watchdog

[Berenice BENVEGUDA]

Hi,

Thanks a lot for you interest in ST25DV64KC product.

There is currently no errata sheet for this product.

Can I ask you if you encounter any issue on which we could help you, please ?

Can you detail your support needs please ?

Best Regards,

BB

[Lex]

Hi,

Thanks for asking.

I found a case related to ST25DV64K WDG, where the watchdog is started only after the next I2C stop condition. Is it a specific HW version or all versions are affected? Also wanted to check if any known issues for KC variant.

I'm investigating sudden communication (via MB) interruption between STM32L0x0+ST25DV64KC and a reader based on X-NUCLEO-NFC06A1. Based on observation the problem exists on MCU/NFC tag side.

A side track we checking related to discovery sample code which we used as a base, where a few bytes (5 or 7 bytes) in MB are reserved for some protocol/check sum and possible resend of data. We want to send raw data without any overhead.

Could you point me to the part which add it in the discovery board source code?

cheers

[Rene Lenerve · Accepted solution]

Hi Lex,

This Watchdog is specific to ST25DVxxK and ST25DVxxKC and it is used in combination of the Mailbox feature (and not related to I²C, see DataSheet for more details).

The source code in the ST25DV discovery is a complete demo example, uses a protocol for exchanges and may be not easy for just send some bytes.

May I suggest to have a look to the ST25 embedded NFC library package, you will find an example for exchanging data using FTM. It is based on ST25DVxxK, NFC04 (but ST25DVxxKC is very similar). in this package you will find also the identical code used on the Reader side (NFC06 example, using FTM).

Hope this can help you.

kind Regards.