NTP53X2 datasheet(110/133 Pages) NXP

110 / 133 page

NXP Semiconductors

NTP53x2

NTAG 5 link - NFC Forum-compliant I2C bridge

NTP53x2

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Product data sheet

Rev. 3.3 — 3 July 2020

COMPANY PUBLIC

544533

110 / 133

aaa-035479

NFC

AREA_0-L

I2C

AREA_0-L

I2C

AREA_0-L

8 - bit

NFC_PP_AREA_0-H

8 - bit I2C_PP

16 - bit

PP_AREA_1

NFC

AREA_0-H

AREA_1

COUNTER

Figure 14. Concept of memory areas

8.6.3 Plain password authentication

NTAG 5 link implements plain password authentication scheme from NFC perspective.

In summary, seven 32-bit passwords are available from NFC perspective.

• Read

• Write

• Restricted AREA_1 Read

• Restricted AREA_1 Write

• Destroy

• NFC Privacy password (is used to come out of NFC PRIVACY mode)

• EAS/AFI protection

64-bit password protection can be enabled for read and write operations.

A 32-bit password is used to authenticate, before doing memory operations. The

mechanism is easy to use. After setting and locking the password, and setting right

access conditions in initialization phase, the NFC Device needs to fetch a random

number from the ICs. XORing the plain password and this random number results in

used password to authenticate.

From I2C perspective, plain password authentication can be enabled with two 32-bit

passwords for the restricted AREA_1 and two for the rest of user EEPROM.

To resist brute force attacks, a negative authentication counter can be enabled.

How to use plain password authentication in applications is described in AN12366.

8.6.4 AES authentication

NTP5332 version of NTAG 5 link implements AES authentication from NFC perspective.

Highest security level of NTAG 5 link is AES mutual authentication based on the Crypto

Suite AES128 as defined in ISO/IEC 29167-10. A 128-bit password is used to (mutual)

authenticate, before doing memory operations.

From I2C perspective, only plain password authentication can be enabled.

How to use AES authentication in applications is described in AN12366.

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