MB89R119B datasheet(36/46 Pages) RAMXEED

36 / 46 page

MB89R119B

DS411-00002-4v0-E

3-5. Fast Read Multiple Blocks Command

The Fast Read Multiple Blocks command is the same as the Read Multiple Blocks Command that reads the

requested block(s). Up to 64 blocks of data can be read for one request. The data rate in the response is

twice as defined in ISO/IEC 15693.

If the Option_flag (bit 7) is “1”, the transponder adds block security status information in the response.

If the Option_flag (bit 7) is “0”, the transponder returns only the data in the specified blocks to the reader/writer.

The value of the “number of blocks” field specified in the request is the expected number of blocks minus 1.

Setting the number of blocks to “06H” makes a request to read 7 blocks.

The maximum number of blocks to be set is “3FH”.

Setting the number of blocks to “00H” makes a request to read 1 block (the request having the same effect

as the Fast Read Single Block 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

3-6. Fast Write Multiple Blocks Command

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

the requested block(s). 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.

If at least one of the blocks specified for data writing 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 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 returns its response (However, if an EOF is not sent within

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

SOF Flags

Command

(Fast Read

Multiple Blocks)

IC manufacturing

code (necessary)

UID

(Addressed

mode)

First

block

number

Number

blocks

CRC

EOF

8 bits

8 bits (“C3H”)

8 bits (“08H”)

64 bits

8 bits

16 bits

SOF

Flags

Error code

CRC

EOF

8 bits (“01H”)

8 bits

16 bits

SOF

Flag

Block security status(option)

Data

CRC

EOF

8 bits (“00H”)

8 bits

64 bits

16 bits

Repeated as required

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