How to configure ST25DV registers via I2C

[Central SUPPORT]

I have a question for the configuration of the static registers via the I2C bus.

The easiest way to configure the Area RF protection and Area ending point registers, (address 0x0004 until 0x000A), is to send a I2C write message to program all 7 data bytes in one I2

See the table 11 snapshot from the datasheet:

However, data is not programmed. Any suggestion why it does not work?

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[Central SUPPORT · Accepted solution]

In fact, configuration registers must be programmed byte-by-byte in separate I2C Write Byte command messages.

We recommend to                                       

·       first set the area limit registers (ENDA1, ENDA2, ENDA3) and

·       then set RF security status registers (RFAnSS).