SL3ICS3001 datasheet(32/54 Pages) NXP

32 / 54 page

SL3ICS3001_072831

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

Product data sheet

COMPANY PUBLIC

Rev. 3.1 — 9 July 2012

072831

32 of 54

NXP Semiconductors

SL3ICS3001

UCODE HSL

11.2.9 GROUP_UNSELECT_LT

When receiving a GROUP_UNSELECT_LT command, a tag which is in the ID state reads

the 8-byte memory content beginning at the specified ADDRESS and compares it with the

WORD_DATA sent by the interrogator. In case the memory content is lower than

WORD_DATA the tag goes into the READY state and will not send any reply. In case the

comparison fails, the tag sets its internal counter COUNT to logic 0, reads its UID, sends

back the UID and stays in the ID state.

11.2.10 MULTIPLE_UNSELECT

When receiving a MULTIPLE_UNSELECT command, a tag which is in the ID state reads

the 1-byte memory content beginning at the specified ADDRESS and compares it with the

BYTE_DATA sent by the interrogator. In case the memory content is equal to

BYTE_DATA and the flag WRITE_OK is set, then the tag goes into the state READY and

will not send any reply. In case the comparison fails, the tag sets its internal counter

COUNT to logic 0, reads its UID and sends back the UID.

This command may be used to unselect all tags that had a successful write, while tags

that had a weak write or write problems stay selected.

Command sequence

Preamble Start Delimiter Command ADDRESS BYTE_MASK WORD_DATA CRC

Response sequence in case of non meeting unselection criteria

Return Preamble ID

CRC

Command sequence

Preamble Start Delimiter

Command ADDRESS BYTE_MASK

WORD_DATA

CRC

Response sequence in case of non meeting unselection criteria

Return Preamble ID

CRC

SL3ICS3001 Datasheet(PDF) 32 Page - NXP Semiconductors