MB89R112 datasheet(36/49 Pages) RAMXEED

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MB89R112

DS411-00004-3v0-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

data of the specified successive blocks.

Up to 256 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 “01H” makes a request to read 2 blocks. 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

[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 Read

Multiple Blocks)

IC manufacturer

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

Flag

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

256 bits

16 bits

Repeated as required

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