SL2S2602 datasheet(26/55 Pages) NXP

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NXP Semiconductors

SL2S2602

ICODE SLIX2

SL2S2602

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

Product data sheet

Rev. 4.1 — 25 July 2017

COMPANY PUBLIC

276341

26 / 55

The INVENTORY READ command provides two modes which are defined by the most

significant bit of the mask length byte as follows:

• Standard mode (MSB mask length byte equal 0)

The standard mode of the INVENTORY READ command is fully backward compatible

to the ICODE SLI and ICODE SLIX (refer to Section "8.4.3.10.1. Standard mode")

• Extended mode (MSB mask length byte equal 1)

The extended mode offers additional features to optimize the inventory procedure for

different requirements (refer to Section "8.4.3.10.2 Extended Mode")

8.4.3.10.1 Standard mode

If MSB mask length byte equal 0 the INVENTORY READ command is used in the

standard mode.

If the Inventory_flag is set to 1 and an error is detected, the ICODE SLIX2 IC remains

silent.

If the Option flag is set to logic 0, n blocks of data are re-transmitted. If the Option flag

is set to 1, n blocks of data and the part of the UID which is not part of the mask are re-

transmitted.

The request contains:

• Flags

• INVENTORY READ command code

• IC manufacturer code

• AFI (if AFI flag set)

• Mask length (most significant bit equal 0)

• Mask value (if mask length > 0)

• First block number to be read

• Number of blocks to be read

• CRC 16

Table 42. INVENTORY READ request format

SOF Flags INVENTORY

READ

IC Mfg

code

AFI

Mask

length

Mask

value

First

block

number

Number

of blocks

CRC16

EOF

8 bits

optional

8 bits

0 to 64

bits

8 bits

16 bits

If the Inventory_flag is set to logic 1, only tags in the READY or SELECTED state will

respond (same behavior as in the INVENTORY command). The meaning of flags 5 to 8

is in accordance with table 5 in ISO/IEC 15693-3.

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

mode (refer to "Section 8.4.3.10.3 Addressed and selected mode).

The number of blocks in the request is one less than the number of blocks that the

ICODE SLIX2 IC returns in its response.

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

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