ST25TA64K datasheet(38/45 Pages) STMICROELECTRONICS

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Functional procedures

ST25TA64K

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DocID027764 Rev 1

Functional procedures

This section describes some procedure to access the memory or manage its protection.

7.1

Selection of an NDEF message

The RF host shall use this procedure to detect the NDEF message inside an ST25TA64K.

The NDEF detection procedure is as follows:

Open an RF session

Send the SelectNDEFTagApplication command

Select the CC file

Read the CC file

Select the NDEF file.

7.2

Reading of an NDEF message

The RF host executes the NDEF read procedure to read the NDEF file.

Detect successfully the NDEF file using the NDEF detection procedure

Check that the read access without any security is granted for the NDEF file from the

information provided by the CC file

Select the NDEF file

Read the NDEF file.

7.3

Reading a locked NDEF file

The RF host executes this procedure to read an NDEF file which has been locked

previously.

Select the NDEF Tag Application

Select the NDEF file

Verify the Read password by using the Verify command

Read the data in the NDEF file.

7.4

Locking an NDEF file

The RF host executes this procedure to protect an NDEF file.

Select the NDEF Tag Application

Check the right access provided by the CC file

Select the NDEF file

Transmit the NDEF file Write password by using the Verify command

Lock the NDEF file by sending the Enable verification command.

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