NTP53X2 datasheet(69/133 Pages) NXP

69 / 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

69 / 133

Table 127. SET PASSWORD response format when Error_flag is set

Flags

Error Code

CRC16

8 bits

16 bits

Remark: If the IC receives an invalid password, it will not execute any following

command until a Power-On Reset (POR) (NFC reset) is executed.

8.2.3.3.3 WRITE PASSWORD

Command code = B4h

The WRITE PASSWORD command enables a new password to be written into

the related memory if the related old password has already been transmitted with

a SET PASSWORD command and the addressed password is not locked (see

Section 8.2.3.3.4).

Remark: The WRITE PASSWORD command can only be executed in addressed or

SELECTED mode. The new password takes effect immediately which means that the

new password has to be transmitted with the SET PASSWORD command to access

protected blocks/pages.

The different passwords are addressed with the password identifier as defined in

Table 125.

The timing of the command is write-alike.

Option_flag = 0b and Option_flag = 1b is supported and is in accordance with ISO/IEC

15693 write-alike commands.

Table 128. WRITE PASSWORD request format

Flags

WRITE

PASSWORD

Manuf. code

UID

Password

identifier

Password

CRC16

8 bits

64 bits

(optional)

8 bits

32 bits

16 bits

Table 129. WRITE PASSWORD response format when Error_flag is NOT set

Flags

CRC16

8 bits

16 bits

Table 130. WRITE PASSWORD response format when Error_flag is set

Flags

Error Code

CRC16

8 bits

16 bits

8.2.3.3.4 LOCK PASSWORD

Command code = B5h

The LOCK PASSWORD command enables the addressed password to be locked if the

related password has already been transmitted with a SET PASSWORD command. A

locked password cannot be changed.

The different passwords are addressed with the password identifier (see Table 125).

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