SL2S3003 datasheet(49/82 Pages) NXP

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NXP Semiconductors

SL2S3003/SL2S3003TT

ICODE 3 (TagTamper)

The INVENTORY READ command can be transmitted also in the addressed or selected mode ( Addressed and

selected mode ).

The number of blocks in the request is one less than the number of blocks that the ICODE 3 IC returns in the

response.

If the Option flag in the request is set to logic 0 the response contains:

SOF

Flags

Data

CRC16

EOF

8 bits

Block length

16 bits

Repeated as needed

Table 82. INVENTORY READ response format: Option flag logic 0

The ICODE 3 IC reads the requested block(s) and sends back their value in the response. The mechanism and

timing of the INVENTORY READ command are similar to the INVENTORY command described in clause 8 of

ISO/IEC 15693-3.

If the Option flag in the request is set to logic 1, the response contains:

SOF

Flags

Rest of UID which is not part of the

mask and slot number

Data

CRC16

EOF

8 bits

0 to 64 bit

Block length

16 bits

Multiple of 8 bits

Repeated as needed

Table 83. INVENTORY READ response format: Option flag logic 1

The ICODE 3 IC reads the requested block(s) and sends back their value in the response. 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 are similar to the INVENTORY command described in clause 8 of ISO/IEC

15693-3.

Note: The number of bits of the re-transmitted UID are calculated as:

• 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

If the sum of the first block number and number of blocks exceeds the total number available user blocks, the

number of transmitted blocks is less than the requested number of blocks. 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

Byte 0

Byte 1

Byte 2

Byte 3

Byte 4

Byte 5

Byte 6

Byte 7

UID

transmitted by interrogator

mask value including padding with zeros

returned value

transmitted by

ICODE 3 IC

Table 84. Example: mask length = 30

SL2S3003/SL2S3003TT

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Product data sheet

Rev. 3.0 — 28 March 2024

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