XRAG2_08 Datasheet, PDF (27/33 Pages) STMicroelectronics – 432-bit UHF, EPCglobal Class1 Generation2 and ISO 18000-6C, contactless memory chip with user memory

XRAG2
XRAG2 command descriptions
8.3.5
8.3.6
8.3.7
8.3.8
BlockWrite
The XRAG2 supports the BlockWrite command as described in the EPCglobal Class 1
generation 2 RFID UHF specification, revision 1.0.9.
The BlockWrite command allows the reader to program blocks of multiple 16-bit words (up
to 4 words) into the Reserved, EPC, and User memory banks in a single operation. Prior to
a BlockWrite operation, the block must be erased using a BlockErase command. If not, the
current data is ORed with new data sent during the BlockWrite command.
After completion of the BlockWrite operation, the XRAG2 backscatters a single bit header
(0b), its handle and a CRC16 within t_BLOCKWRITE. The XRAG2 backscatters the non-specific
error code 0Fh within t_BLOCKWRITE if an error is encountered during the transmission of the
BlockWrite command.
The duration of the BlockWrite cycle t_BLOCKWRITE is specified in Table 11.
BlockErase
The XRAG2 supports the Block Erase command as described in the EPCglobal Class 1
generation 2 RFID UHF specification, revision 1.0.9.
The BlockErase command allows the reader to erase blocks of multiple 16-bit words (up to
the complete memory bank) into the Reserved, EPC, or User memory banks in a single
operation.
After completion of the BlockErase operation, XRAG2 backscatters a single bit header (0b),
its Handle and a CRC16 within t_BLOCKERASE. XRAG2 backscatters the non specific error
code 0Fh within t_BLOCKERASE if an error is encountered during the sending of the
BlockErase command.
The duration of the BlockErase cycle t_BLOCKERASE is specified in Table 11.
Kill
The XRAG2 supports the KILL command as described in the EPCglobal Class 1 generation
2 RFID UHF specification, revision 1.0.9.
The Kill command allows readers to permanently disable a tag.
Lock
The XRAG2 supports the Lock command as described in the EPCglobal Class 1 generation
2 RFID UHF specification, revision 1.0.9.
The Lock command allows the reader to lock individual passwords and memory banks
thereby preventing or allowing subsequent writes and/or reads of these passwords and
memory banks. The status of the passwords and memory banks can be permanently locked
(permalocked).
Table 11. XRAG2 Write, BlockWrite and BlockErase parameters⁽¹⁾
Parameter
Description
Min
Max
Unit
t_WRITE
Write cycle time
t_BLOCKWRITE BlockWrite cycle time
t_BLOCKERASE BlockErase cycle time
1. Characterized only.
20
ms
20
ms
20
ms
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