NTP53X2 datasheet(14/133 Pages) NXP

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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

14 / 133

• read

• increased by one, optionally protected with the read password or by mutual

authentication with a key with the Read privilege

The counter can be read with an (EXTENDED) READ SINGLE BLOCK to the last block

or (EXTENDED) READ MULTIPLE BLOCK command including the last block. The 4 byte

data of the counter block provide the following information in Table 8.

Table 8. COUNTER BLOCK data structure

Byte

Name

Value

Description

C0 (LSB)

00h - FFh

C1 (MSB)

00h - FFh

Counter value

00h

RFU

00h

Incrementing of the counter value is not protected

PROT

01h

Incrementing of the counter value is protected with the read password or by

mutual authentication depending on the used security level

The counter can be preset to a start value with an (EXTENDED) WRITE SINGLE BLOCK

command to counter block. The counter can only be preset to a start value after a SET

PASSWORD command with the write password or a valid mutual authentication with a

key with the Write privilege, depending on the used security level.

The PROT byte (data byte 3) value defines if the protection to increment the counter is

enabled or disabled. If the protection is enabled, the read password or a valid mutual

authentication with a key with the Read privilege is required to increment the counter

value, again depending on the used security level.

The data for the (EXTENDED) WRITE SINGLE BLOCK command to preset the counter

is defined in Table 9.

Remark: A Preset counter value of 0x0001 is not possible, a (EXTENDED) WRITE

SINGLE BLOCK command with that value will only increment the counter.

Table 9. Preset counter data structure

Byte

Name

Value

Description

00h, 02h -

FFh (LSB)

00h - FFh

(MSB)

Counter value

00h

RFU

00h

Disable the protection to increment the counter

PROT

01h

Enable the protection to increment the counter with read password or mutual

authentication

To increment the counter by one with a (EXTENDED) WRITE SINGLE BLOCK

command to counter block. If the protection to increment the counter is enabled, a SET

PASSWORD command with the read password or a valid mutual authentication with a

key with the Read privilege is required before.

The data for the (EXTENDED) WRITE SINGLE BLOCK command to increment the

counter is defined in Table 10.

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