NTP53X2 datasheet(81/133 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

81 / 133

When receiving the INVENTORY READ request, NTAG 5 link performs the same as the

anti-collision sequence, with the difference that instead of the UID and the DSFID, the

requested response is defined by additional options.

The INVENTORY READ command provides two modes which are defined by the most

significant bit of the mask length byte as follows:

• Standard mode (most significant bit of mask length byte equal 0b)

(see Section 8.2.3.5.1.1)

• Extended mode (most significant bit of mask length byte equal 1b)

The extended mode offers additional features to optimize the inventory procedure for

different requirements (see Section 8.2.3.5.1.2)

The INVENTORY READ command may also be transmitted in addressed or SELECTED

mode. Then the command behaves similar to a READ or READ MULTIPLE BLOCK (see

Section 8.2.3.5.1.3).

8.2.3.5.1.1 Standard mode

If most significant bit of mask length byte is equal 0b the INVENTORY READ command

is used in the standard mode.

If the Inventory_flag is set to 1b and an error is detected, NTAG 5 link remains silent.

If the Option flag is set to 0b, n blocks of data are transmitted. If the Option flag is set to

1b, n blocks of data and the part of the UID which is not part of the mask are transmitted.

The request contains:

• Flags

• INVENTORY READ command code

• IC manufacturer code

• AFI (if AFI_flag is set to 1b)

• Mask length (most significant bit equal 0b)

• Mask value (if mask length > 00h)

• First block number to be read

• Number of blocks to be read

• CRC 16

Table 172. INVENTORY READ request format

Flags

INVENTORY

READ

Manuf.

code

AFI

Mask

length

Mask value First block

number

Number of

blocks

CRC16

8 bits

(optional)

8 bits

0 to 8 bytes 8 bits

8 bits

16 bits

If the Inventory_flag is set to 1b, only NTAG 5 link in the READY or SELECTED

(SECURE) state will respond (same behavior as in the INVENTORY command). The

meaning of Flags bits 7 to 4 is as defined in ISO/IEC 15693.

The INVENTORY READ command can also be transmitted in the addressed or

SELECTED mode (see Section 8.2.3.5.1.3).

The number of blocks in the request is one less than the number of blocks that NTAG 5

link returns in its response.

If the Option_flag in the request is set to logic 0b the response contains:

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