NTP53X2 datasheet(21/133 Pages) NXP

21 / 133 page

NXP Semiconductors

NTP53x2

NTAG 5 link - NFC Forum-compliant I2C bridge

NTP53x2

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 3.3 — 3 July 2020

COMPANY PUBLIC

544533

21 / 133

Value

Mode

Write Access

All others

Invalid

8.1.3.3 Customer ID (CID)

The Customer ID at delivery is C000h and can be reprogrammed and locked. It might be

used to identify the product.

The two most significant bits (b7 and b6 of CID (MSB)) are always equal to 11b. Only

CID[13-0] may be written by customer. Note, that other values of the two most significant

bits are RFU.

When the CID is written with WRITE CONFIG command, the 2 most significant bits are

always set to 11b. The input CID in WRITE CONFIG command (see Section 8.2.3.2.2) is

bit wise ORed with C000h.

As long as not locked by the I2C section lock, CID maybe updated from I2C perspective

with the same logic as from NFC perspective.

Example: When setting CID to 10AAh, resulting customer-specific CID is D0AAh.

Table 15. Customer ID (CID) location

Block Address

NFC

I2C

Byte 0

Byte 1

Byte 2

Byte 3

09h

1009h

CID (LSB)

CID (MSB)

RFU

The CID can be permanently locked by setting the Configuration Header to Locked state

(see Table 14) using WRITE CONFIG command. Note, that Originality Signature gets

locked, too.

8.1.3.4 NFC Global Crypto Header

The NFC Global Crypto Header (NFC_GCH) defines the status and access of the

• NFC passwords in plain password mode and all other NFC features listed below

• NFC Keys

• NFC Protection Pointer

• NFC Protection Pointer Conditions

• NFC Key Headers

• NFC Key Privileges

• NFC Crypto Configuration Header

• EAS and AFI protection

As long as not locked by the RF section lock, the NFC Global Crypto Header can be

written with WRITE CONFIG command (see Section 8.2.3.2.2). The programming of

NFC Global Crypto Header can be done in only one direction from lower state to higher

independently from the interface and it is irreversible.

Same rules apply from I2C perspective, as long as not locked by the I2C section lock.

Once locked (as per table below), GCH cannot be updated anymore.

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