NTP53X2 datasheet(84/133 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

84 / 133

Table 178. Inventory Read (extended mode) response format: Option_flag 1b

Flags

Optional truncated UID OR

complete UID

Optional data

CRC16

8 bits

0 to 64 bits

Block length

16 bits

Multiple of 8 bits

Repeated as needed

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

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

If the UID is requested in the truncated format the retransmitted UID can be calculated as

follows:

16 slots: 64 - 4 - mask length rounded up to the next byte boundary

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

Example: mask length = 30 Returned: 64 - 4 - 30 = 30 gives 4 bytes

Table 179. Example

Byte 0

Byte 1

Byte 2

Byte 3

Byte 4

Byte 5

Byte 6

Byte 7

UID

mask value incl. padding with zeros

transmitted by

Interrogator

returned value

transmitted by NTAG 5

link

8.2.3.5.1.3 Addressed and SELECTED mode

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

SELECTED mode. In this case, the Inventory_flag is set to 0 and the meaning of flags 7

to 4 is in accordance with ISO/IEC 15693.

In the addressed or selected mode, the INVENTORY READ command behaves similar to

a READ or READ MULTIPLE BLOCK command.

In the addressed mode, it is recommended to address the IC with a mask length of 64

and to transmit the complete UID in the mask value field.

In the selected mode (IC has been selected with a valid SELECT command before), it is

recommended to address the IC with a mask length of 0 (and do not transmit the mask

value field).

Remark: If the INVENTORY READ command is used in the addressed or selected

mode, the AFI shall not be transmitted and the IC will only respond in the first-time slot.

8.2.3.5.2 FAST INVENTORY READ

Command code = A1h

When receiving the FAST INVENTORY READ command, NTAG 5 link behaves the

same as the INVENTORY READ command with the following exceptions:

The data rate in the direction NTAG 5 link to the reader is twice as defined in ISO/IEC

15693 depending on the Datarate_flag 53 kbit (high data rate) or 13 kbit (low data rate).

The data rate from the reader to NTAG 5 link and the time between the rising edge of the

EOF from the reader to NTAG 5 link remains unchanged (stays the same as defined in

ISO/IEC 15693).

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