M24SR データシートの表示（PDF） - STMicroelectronics

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M24SR

Dynamic NFC/RFID tag IC with 2-Kbit EEPROM, NFC Forum Type 4 Tag and I²C interface

STMicroelectronics 

M24SR02-Y memory management

M24SR02-Y

3.5

I2C password

The I²C password can be sent only by the I²C host. It activates the SuperUser rights. The I²C

host with the SuperUser rights can:

• Access the NDEF file regardless of the right access and without sending the NDEF file

passwords.

• Change the access rights regardless of the current state.

The length of the I²C password is 128 bits (16 bytes).

3.5.1

I²C password and I²C protect field of the System file

The I²C protect field in the system file can be set to:

• 0x00: the I²C host has the SuperUser right access without sending the I²C password

• 0x01: the I²C host has the SuperUser right access after sending the I²C password

For more details about the system file layout, refer to Section 3.1.4: System file layout.

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DocID025386 Rev 10

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