MB89R119B datasheet(30/46 Pages) RAMXEED

30 / 46 page

MB89R119B

DS411-00002-4v0-E

2-8. Write AFI command

On receiving the Write AFI command, the transponder writes AFI value into FeRAM.

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 write

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.)



Request (from the reader/writer to the transponder)



Response (from the transponder to the reader/writer)

(1) When Error_flag set

(2) When Error_flag not set

2-9. Lock AFI command

On receiving the Lock AFI command, the transponder locks (write disable) the AFI value permanently into

FeRAM.

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 to

+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 AFI data cannot be changed by the Write AFI command.



Request (from the reader/writer to the transponder)



Response (from the transponder to the reader/writer)

(1) When Error_flag set

(2) When Error_flag not set

SOF

Flags

Command (Write AFI) UID (Addressed mode)

AFI

CRC

EOF

8 bits

8 bits (“27H”)

64 bits

8 bits

16 bits

SOF

Flags

Error code

CRC

EOF

8 bits (“01H”)

8 bits

16 bits

SOF

Flags

CRC

EOF

8 bits (“00H”)

16 bits

SOF

Flags

Command (Lock AFI) UID (Addressed mode)

CRC

EOF

8 bits

8 bits (“28H”)

64 bits

16 bits

SOF

Flags

Error code

CRC

EOF

8 bits (“01H”)

8 bits

16 bits

SOF

Flags

CRC

EOF

8 bits (“00H”)

16 bits

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