SL2S3003 datasheet(31/82 Pages) NXP

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NXP Semiconductors

SL2S3003/SL2S3003TT

ICODE 3 (TagTamper)

8.2.3.3 NFC ASCII mirror feature

The NFC ASCII mirror feature of ICODE 3 enables the label IC to virtually mirror:

• The 8-byte UID (see Section 8.2.1), and

• The 3-byte NFC counter value (see Section 8.2.3.1.2).

ICODE 3 TagTamper (SLS3003TT) virtually mirrors in addition:

• The 4-byte TagTamper message, and

• The 1-byte actual TagTamper status.

The feature depends on NFC mirror settings into the physical memory of the IC in ASCII code. On a READ

or FAST READ command to the assigned user memory blocks, the label IC responds with the virtual memory

content of the UID and/or NFC counter value (SL2S3003) and/or TagTamper message and/or current

TagTamper status (SLS3003TT) in ASCII code depending on the settings in the NFC_MIRROR_CTR byte (see

Table 16).

The required length of the reserved physical memory for the mirror functions and the order for the ASCII mirrors

are specified in Table 47.

Note: The number of bytes (see Table 47) of the enabled ASCII mirrors must not exceed the boundary of the

user memory. Use only valid values for NFC_MIRROR_BLK and NFC_MIRROR_BYTE. If the ASCII mirror

exceeds the user memory area, the ASCII mirroring stops at the end of the user memory.

ASCII mirror and order

Required number of bytes in the physical memory

UID mirror

16 bytes

UID + NFC counter mirror

23 bytes

(16 bytes for UID + 1 byte separation + 6 bytes NFC counter value)

ICODE 3 TagTamper (SL2S3003

TT) only:

UID + NFC counter mirror + Tag

Tamper message mirror

32 bytes

(16 bytes for UID + 1 byte separation + 6 bytes NFC counter value + 1 byte separation +

8 bytes TagTamper message)

ICODE 3 TagTamper (SL2S3003

TT) only:

UID + NFC counter mirror + Tag

Tamper message mirror + Tag

Tamper status

34 bytes

(16 bytes for UID + 1 byte separation + 6 bytes NFC counter value + 1 byte separation +

8 bytes TagTamper message + 1 byte separation + 1 byte current TagTamper Status)

Table 47. Required memory space for ASCII mirror

The fields are mirrored into the defined user memory area in the following order:

• UID: MSB first

• NFC counter: MSB First

• TagTamper message: LSB fist

The NFC_MIRROR_BLK and NFC_MIRROR_BYTE values in the configuration define the position within the

user memory where the mirroring of the ASCII mirror starts.

The NFC_MIRROR_BLK value defines the block where the ASCII mirror starts and the NFC_MIRROR_BYTE

value defines the starting byte within the defined block.

The ASCII mirrors are enabled with the NFC_MIRROR_SEL bits (see Table 17.)

If more than one ASCII mirror is enabled, the ASCII mirrors are separated automatically with an "x" character

(78h ASCII code).

SL2S3003/SL2S3003TT

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 3.0 — 28 March 2024

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