ST25TA02K datasheet(11/50 Pages) STMICROELECTRONICS

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ST25TA02K

ST25TA02K memory management

3.1

Memory structure

The ST25TA02K supports the NDEF Tag Application as defined in the NFC Forum Type 4

Tag. The ST25TA02K is composed of three files:

•

One Capability Container file

•

One NDEF file

•

One System file: this file is an ST-proprietary file

The System file contains some information on the configuration of the ST25TA02K device.

The CC file gives some information about the ST25TA02K itself and the NDEF file. The

NDEF file contains the User data.

3.1.1

File identifier

The file identifier is the value used in the Select command to select a file.

3.1.2

CC file layout

The CC file gives some information about the ST25TA02K and the NDEF file. This file is a

read-only file for the RF host and cannot be modified by issuing a write command.

The T field, Read Access and Write Access fields can be changed by the RF host by issuing

a specific process (refer to Section 7: Functional procedures).

Table 3. File identifier

File identifier

Meaning

0xE101

System file

0xE103

CC file

0x0001

NDEF file

Table 4. CC file layout for 1 NDEF file

File offset

Meaning

Value

Comments

0x0000

Length CC file

0x000F

15 bytes

0x0002

Mapping version(1)

0x20 or 0x10

V 2.0 or V 1.0

0x0003

Maximum number of bytes that can be read

0x00FF

255 bytes

0x0005

Maximum number of bytes that can be written

0x0036

54 bytes

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