M24SR16-Y Datasheet, PDF (22/89 Pages) STMicroelectronics – Support of NDEF data structure

M24SR16-Y memory management
M24SR16-Y
3.1.3
File offset
Table 4. CC file layout for 1 NDEF file
Meaning
Value
0x0000
0x0002
0x0003
0x0005
0x0007
0x0008
0x0009
0x000B
Number of bytes of CC file
Mapping version⁽¹⁾
0x000F
0x20 or 0x10
Maximum number of bytes that can be read 0x00F6
Maximum number of bytes that can be written 0x00F6
0x04 ⁽²⁾
0x06
NDEF file control TLV
0x0001
0x0800
0x000D
0x000E
1. According to the reader.
2. Delivery state.
0x00 ⁽²⁾
0x00 ⁽²⁾
Comments
15 bytes
V 2.0 or V 1.0
246 bytes
246 bytes
T field
L field
FileID
Maximum NDEF
file size
Read access
Write access
NDEF file layout
The NDEF file contains the NDEF message which contains the User data. The RF host or
the I²C host can read and write data inside the file. The first two bytes named NDEF
Message Length define the size of the NDEF message. The NDEF Message Length shall
be managed by the application and the M24SR16-Y device does not check if its value is
relevant vs the data written by the RF or I²C host. The M24SR16-Y device uses the NDEF
Message Length, e. g. the standard read can be processed only inside the NDEF message;
otherwise, the M24SR16-Y device returns an error code. For more details about the read
command, refer to Section 5.6.7: ReadBinary command.
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