SL900A datasheet(29/103 Pages) AMSCO

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ams Datasheet

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[v1-12] 2018-Oct-29

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SL900A − Commands

Write - #09

The WRITE command allows the interrogator to write a word (16

bits) in the tags Reserved, EPC, TID or User memory. Prior to

sending the Write command, the interrogator has to send the

REQ_RN command in order to receive a new RN16 that will be

used for cover-coding the data by EXOR-ing it with the RN16.

In case the data writing has been successful, the tag will

backscatter the response within 20ms after receiving the

command.

Kill - #10

The KILL command is used to permanently disable a tag. When

the tag receives the correct multi-step Kill procedure, it will

transition to the Killed state and will not send any response

thereafter.

Lock - #11

The LOCK command instructs the tag to lock the specified block

of the EEPROM memory. The Kill and Access passwords can be

Read/Write locked, while the EPC, TID and User block can only

be Write locked. The command will only be executed in the

Secured state.

Access - #12

The ACCESS command with a correct password and correct

multi-step procedure instructs the tag to transition from the

Open to the Secured state. When the tag has successfully

received the multi-step access procedure, it will backscatter its

handle.

BlockWrite - #13

The BLOCK_WRITE command writes a single word of data (16

bits) to the specified memory address. It provides faster data

writing than the WRITE command as it does not need a new

RN16 for every word of data that has to be written. In case the

data writing has been successful, the tag will backscatter the

response within 20ms after receiving the command.

BlockErase - #14

The BLOCK_ERASE command erases a single word in the

specified memory bank. In case the erase has been successful,

the tag will backscatter the response within 20ms after

receiving the command.

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