ST25TA64K datasheet(39/45 Pages) STMICROELECTRONICS

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ST25TA64K

Functional procedures

7.5

Unlocking an 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 NDEF file Write password by using the Verify command

Unlock the NDEF file by sending the Disable verification command.

7.6

Reaching the read-only state for an 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

Transmit the NDEF file Write password by using the Verify command

Select the NDEF file

Send an EnablePermanentState command as the Write access right of the previous

Select NDEF file.

7.7

Changing an NDEF password procedure

The RF host could use this procedure to change one NDEF password. it can be a Read or

Write password.

Select the NDEF Tag Application

Select the NDEF file

Transmit the NDEF file Write password by using the Verify command

Change the password by sending a ChangeReferenceData command.

7.8

Changing a File type Procedure

The RF host executes this procedure to change the File Type of a file for which all access

rights were previously granted.

Select the NDEF Tag Application

Select the File to be modified

Set the File Length to 0x00 using the UpdateBinary command

Send an UpdateFileType command with the New file Type as data.

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