ST25TA02K-P datasheet(24/64 Pages) STMICROELECTRONICS

Part #	ST25TA02K-P

Description	NFC Forum Type 4 Tag IC with 2-Kbit EEPROM and General Purpose Digital Output

PDF	64 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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24 / 64 page

ST25TA02K-P memory management

ST25TA02K-P

24/64

DocID027794 Rev 2

The state 0xFF and 0xFE cannot be changed by using the Read or Write passwords.

3.2.2

Changing the read access right to NDEF files

The state diagram on Figure 12 shows how to change the access right to read an NDEF file.

Figure 12. Changing the read access right to an NDEF file

1. See the procedure to lock the read access (Section 7.4: Locking an NDEF file).

2. See the procedure to unlock the read access (Section 7.5: Unlocking an NDEF file).

3. See the procedure to permanently lock the read access (Section 7.6: Reaching the read-only state for an

NDEF file).

4. Proprietary state, not defined by NFC Forum Type 4 Tag.

Table 10. Write access right

Value

Meaning

0x00

Write access without any security

0x80

Locked (1)

1. The write password shall be sent before writing in the NDEF file.

0xFF

Write not authorized

ST25TA02K-P Datasheet(PDF) 24 Page - STMicroelectronics