NTP53X2 datasheet(86/133 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

86 / 133

When receiving WRITE SRAM desired SRAM blocks will be written to the SRAM. It is

recommended to use this command in pass-through mode because of performance

reasons.

If SRAM is write protected a valid authentication needs to be preceded.

The blocks are numbered from 00h to 3Fh. The number of blocks in the request is one

less than the number of blocks that the VICC shall write. E.g., to write one block to SRAM

Number of Blocks is coded as 00h.

Option_flag = 0b and Option_flag = 1b is supported and is in accordance with ISO/IEC

15693 write-alike commands.

Table 183. WRITE SRAM request format

Flags

WRITE

SRAM

IC Mfg

code

UID

Block

Address

Number of

blocks

Data

CRC16

8 bits

64 bits

(optional)

8 bits

(Number of

blocks + 1)

times 32 bits

16 bits

Table 184. WRITE SRAM response format when Error_flag is NOT set

Flags

CRC16

8 bits

16 bits

Table 185. WRITE SRAM response format when Error_flag is set

Flags

Error Code

CRC16

8 bits

16 bits

8.2.3.7 Originality Signature

8.2.3.7.1 READ SIGNATURE

Command code = BDh

The READ SIGNATURE command returns an IC-specific, 32 byte ECC signature. How

to change and / or lock the originality signature is described in Section 8.8.

Only Option_flag = 0b is supported.

Table 186. READ SIGNATURE request format

Flags

READ

SIGNATURE

Manuf. code

UID

CRC16

8 bits

64 bits (optional)

16 bits

Table 187. READ SIGNATURE response format when Error_flag is NOT set

Flags

Originality Signature

CRC16

8 bits

256 bits

16 bits

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