SRTAG2KL datasheet(12/51 Pages) STMICROELECTRONICS

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SRTAG2KL memory management

SRTAG2KL

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DocID026583 Rev 2

3.1.3

NDEF file layout

The NDEF file contains the NDEF message which contains the User data. The RF 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 SRTAG2KL device does not check if its value is relevant vs the data

written by the RF host. The SRTAG2KL device uses the NDEF Message Length, e. g. the

standard read can be processed only inside the NDEF message; otherwise, the SRTAG2KL

device returns an error code. For more details about the read command, refer to

Section 5.6.7: ReadBinary command.

0x0007

NDEF file control TLV

0x04 (2)

T field

0x0008

0x06

L field

0x0009

0x0001

FileID

0x000B

0x0100

Maximum NDEF

file size in Byte

0x000D

0x00 (2)

Read access

0x000E

0x00 (2)

Write access

1. According to the reader command format SRTAG2KL will automatically align to the corresponding NFC

Forum version.

2. Delivery state.

Table 4. CC file layout for 1 NDEF file (continued)

File offset

Meaning

Value

Comments

Table 5. NDEF file layout

File offset

Byte 0

Byte 1

Byte 2

Byte 3

0x0000

NDEF message length

User data

0x0004

User data

...

0x00FC

...

User data

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