MB89R112 datasheet(34/49 Pages) RAMXEED

34 / 49 page

MB89R112

DS411-00004-3v0-E

3-2. Refresh System Blocks Command

The Refresh System Blocks command write “00H” into the requested area of FeRAM.

When the requested area is in the system area, “00H” shall be written into excepting UID area.

If the requested area is user area , there is no limitation to execute the Refresh System Blocks command.

However if the requested area is system area, the Refresh System Blocks command can be executed only

once.

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”, the 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

[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

Bank Number

The Block for Refresh

00H

User area 00H to 3FH

01H

User area 40H to 7FH

02H

User area 80H to BFH

03H

User area C0H to FFH

FFH

System area (The UID area is excluded.)

Except the above

Prohibition of a setup (A 10H error reply is returned. )

SOF Flag

Command

(Refresh System Blocks)

IC manufacturer

code

UID

(Addressed mode)

Bank

Number CRC EOF

8 bits

8 bits (“BCH”)

8 bits (“08H”)

64 bits

8 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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