NTP53X2 datasheet(82/133 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

82 / 133

Table 173. INVENTORY READ response format: Option flag logic 0b

Flags

Data

CRC16

8 bits

Number of blocks times 32 bits 16 bits

NTAG 5 link reads the requested block(s) and sends back their value in the response.

The mechanism and timing of the INVENTORY READ command performs the same as

the INVENTORY command which is defined in ISO/IEC 15693.

If the Option_flag in the request is set to logic 1b, the response contains:

Table 174. INVENTORY READ response format: Option flag logic 1b

Flags

Rest of UID which is not

part of

the mask and slot number

Data

CRC16

8 bits

0 to 64 bit, always a multiple

of 8 bits

Number of blocks times 32

bits

16 bits

NTAG 5 link reads the requested block(s) and sends back their value in the response.

Additionally the bytes of the UID, which are not parts of the mask and the slot number

in case of 16 slots, are returned. Instead of padding with zeros up to the next byte

boundary, the corresponding bits of the UID are returned. The mechanism and timing

of the INVENTORY READ command perform the same as the INVENTORY command

which is defined in ISO/IEC 15693.

Remark: The number of bits of the retransmitted UID can be calculated as follows:

• 16 slots: 60 bits (bit 64 to bit 4) - mask length rounded up to the next byte boundary

• 1 slot: 64 bits - mask length rounded up to the next byte boundary

Remark: If the sum of first block number and number of blocks exceeds the total

available number of user blocks, the number of transmitted blocks is less than the

requested number of blocks. This means that the last returned block is the highest

available user block, followed by the 16-bit CRC and the EOF.

Example: mask length = 30 bits

Returned: bit 64 to bit 4 (30 bits) = 30 gives 4 bytes

Table 175. Example: mask length = 30

Byte 0

Byte 1

Byte 2

Byte 3

Byte 4

Byte 5

Byte 6

Byte 7

UID

mask value including padding with zeros

transmitted by

interrogator

returned value

transmitted by NTAG 5

link

8.2.3.5.1.2 Extended Mode

If the most significant bit of the Mask Length byte is equal 1b the response format is

defined by the extended option byte.

The request contains:

• Flags

• Inventory Read command code

• IC Manufacturer code

• AFI (if the AFI flag is set to 1b)

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