AN4433 Datasheet, PDF (10/34 Pages) STMicroelectronics – Storing data into the NDEF memory of M24SR

M24SR specificities
AN4433
Note:
Figure 3. NDEF file layout
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In Figure 3, the colors have the following meaning:
– Orange: NDEF message length,
– Green: NDEF message content,
– Red: remaining non-readable bytes)
To be able to read beyond NDEF message, M24SRxx-Y products offer a proprietary
command: ExtendedReadBinary command.
This command can read the bytes beyond NDEF message, until the end of the file.
See doc [6]. for more information on this command.
2.3
UpdateFileType command
NFC Forum Type 4 Tag has 2 types of data files: NDEF and Proprietary files.
Natively, M24SRxx-Y products contain 1 mandatory NDEF file.
M24SRxx-Y products offer a proprietary command to turn the type of the file from one type
to the other UpdatedFiletype
For more details on this command, see doc. [6].
Warning:
– Turning NDEF file to Proprietary one, makes the tag no more NFC compliant; only
proprietary application will be able to deal with the tag (see Section 1.1).
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