MB89R118C datasheet(37/47 Pages) RAMXEED

37 / 47 page

MB89R118C

DS411-00001-6v0-E

3-8. Fast Write Multiple Blocks Command

The Fast Write Multiple Blocks command is the same as the Write Multiple Blocks command that writes the

successive multiple-block data included in the request.

Up to 2 blocks of data can be written for one request. The data rate in the response is twice as defined in

ISO/IEC 15693.

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

number of blocks specified in the Fast Write Multiple Blocks command is similar to the number of blocks

specified in the Read Multiple Blocks command. The value of the number of blocks field specified in the Fast

Write Multiple Blocks command is obtained by subtracting 1 from the number of the expected blocks to be

written.

Setting the number of blocks to “01H” makes a request to write 2 blocks. Setting the number of blocks to

“00H” makes a request to write 1 block (the request having the same effect as the Fast Write Single Block

command).

If at least one of the blocks specified by the request is locked, the transponder does not write any data and,

instead, returns an error code.

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 returns 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

SOF Flag

Command

(Fast Write

Multiple Blocks)

ICmanufacturer

code

UID

(Addressed

mode)

First

block

number

Number

of blocks

Data

CRC EOF

8 bits

8 bits (“C4H”)

8 bits (“08H”)

64 bits

8 bits

64 bits

128 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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