MB89R112 datasheet(28/49 Pages) RAMXEED

28 / 49 page

MB89R112

DS411-00004-3v0-E

2-8. Lock AFI command

On receiving the Lock AFI command, the transponder locks (write disable) permanently the data of AFI.

The transponder performs verification after writing and returns an error code if the writing has failed.

If the Option_flag (bit 7) is “0”, the transponder shall return its response when it has completed the lock

operation starting after “t1nom (320.9 s)  a multiple of 4096/fc (302.1 s)” with total tolerance of 32/fc

(2.4 s) and latest within 20 ms. If it is “1”, transponder shall wait for the reception of an EOF from the reader/

writer and upon such reception still return its response (However, if an EOF is not sent within 38 ms, the

time-out occurs and the transponder can receive another command) .

Once the Lock AFI command has been received, the data of AFI cannot be changed by the any command.



Request

[Request from the reader/writer to the transponder]



Response

[Response from the transponder to the reader/writer]

(1) When Error_flag set

(2) When Error_flag not set

SOF

Flag

Command (Lock AFI) UID (Addressed mode)

CRC

EOF

8 bits

8 bits (“28H”)

64 bits

16 bits

SOF

Flag

Error code

CRC

EOF

8 bits (“01H”)

8 bits

16 bits

SOF

Flag

CRC

EOF

8 bits (“00H”)

16 bits

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