XRAG2_08 Datasheet, PDF (23/33 Pages) STMicroelectronics – 432-bit UHF, EPCglobal Class1 Generation2 and ISO 18000-6C, contactless memory chip with user memory

XRAG2
XRAG2 command descriptions
8
XRAG2 command descriptions
The XRAG2 offers Select, Inventory, and Access command sets as described in EPCglobal
Class 1 generation 2 RFID UHF specification, revision 1.0.9.
8.1
8.1.1
Select command set
Select
The XRAG2 supports the Select command as described in the EPCglobal Class 1
generation 2 RFID UHF specification, revision 1.0.9.
This command defines a tag population based on user-defined criteria for the next inventory
and access operations.
Readers can use one or more Select commands to select a particular tag population before
inventory.
8.2
8.2.1
8.2.2
8.2.3
8.2.4
Inventory command set
Query
The XRAG2 supports the Query command as described in the EPCglobal Class 1
generation 2 RFID UHF specification, revision 1.0.9.
This command initiates and specifies an inventory round. The Query command also
specifies the tag-to-reader data rate and coding scheme (FM0 or Miller).
QueryRep
The XRAG2 supports the QueryRep command as described in the EPCglobal Class 1
generation 2 RFID UHF specification, revision 1.0.9.
This command instructs tags participating in the inventory round to decrement their slot
counter. If slot=0 after decrementing, tag backscatters a 16-bit Random Number (RN16).
QueryAdjust
The XRAG2 supports the QueryAdjust command as described in the EPCglobal Class 1
generation 2 RFID UHF specification, revision 1.0.9.
This command increments, decrements or leaves unchanged the number of slots in the
inventory round without changing any other parameter of the round.
ACK
The XRAG2 supports the ACK command as described in the EPCglobal Class 1 generation
2 RFID UHF specification, revision 1.0.9.
This command acknowledges a single tag in the Reply state. The tag enters the
Acknowledged state and replies by backscattering its PC, EPC and CRC16.
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