NTP53X2 datasheet(29/133 Pages) NXP

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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

29 / 133

Table below shows the location of the I2C Key Header Configuration in the configuration

memory:

Table 30. I2C Key Header (I2C_KH) location

Block Address

NFC

I2C

Byte 0

Byte 1

Byte 2

Byte 3

30h

1030h

I2C_KH

RFU

Table 31. I2C Key Header Values

Value

Status

Description

81h

Not active

(default)

The related I2C passwords, I2C Protection Pointer and I2C Protection Pointer

Condition can be read and written with the I2C READ and I2C WRITE commands.

The related password is not active and cannot be used.

C3h

Active

The I2C passwords are active. After authentication with write key the I2C_PP,

I2C_PPC and Key header can be written and I2C Keys can be read or written.

E7h

Active and locked The I2C key is active and locked and cannot be modified any longer. The related key

cannot be read or written with the I2C READ or I2C WRITE command. The I2C_PP

and I2C_PPC can be read with the READ command, but writing with the WRITE

command is not possible any longer.

all other

Disabled

Key is disabled and cannot be used

8.1.3.11 I2C Protection Pointer and Condition

The I2C Protection pointer (I2C_PP) defines the address of the user memory where

the user memory below PP_AREA_1 is divided into AREA_0-L and AREA_0-H, two

arbitrarily sized sections with independent access conditions, which are defined by

condition byte (I2C_PPC).

The NFC interface can access this configuration block with READ CONFIG and WRITE

CONFIG commands if not locked by NFC section lock.

Table 32. I2C Protection Pointer and Configuration location

Block Address

NFC

I2C

Byte 0

Byte 1

Byte 2

Byte 3

31h

1031h

I2C_PP

I2C_PPC

RFU

The protection pointer address (I2C_PP) defines the base address where the user

memory below PP_ARA_1 is divided into higher and lower sections.

• The memory address below protection pointer address is called I2C AREA_0-L.

• The memory address above and including protection pointer address is called I2C

AREA_0-H

• I2C AREA_0-H ends, where AREA_1 starts. Note it is the same position (PP_AREA_1)

as from NFC perspective (see Section 8.1.3.24).

Below is an example where the memory is divided into to areas with I2C_PP address

set to 0050h. In this example PP_AREA_1 is pointing outside the user EEPROM, which

means I2C AREA_0-H ends at the end of the user memory.

Default value of I2C_PP is FFh.

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