XRAG2_08 datasheet(27/33 Pages) STMICROELECTRONICS

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XRAG2

XRAG2 command descriptions

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8.3.5

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 tBLOCKWRITE. The XRAG2 backscatters the non-specific

error code 0Fh within tBLOCKWRITE if an error is encountered during the transmission of the

BlockWrite command.

The duration of the BlockWrite cycle tBLOCKWRITE is specified in Table 11.

8.3.6

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 tBLOCKERASE. XRAG2 backscatters the non specific error

code 0Fh within tBLOCKERASE if an error is encountered during the sending of the

BlockErase command.

The duration of the BlockErase cycle tBLOCKERASE is specified in Table 11.

8.3.7

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.

8.3.8

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)

Characterized only.

Parameter

Description

Min

Max

Unit

tWRITE

Write cycle time

tBLOCKWRITE

BlockWrite cycle time

tBLOCKERASE

BlockErase cycle time

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