ST25DV64K datasheet(160/220 Pages) STMICROELECTRONICS

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RF operations

ST25DV04K ST25DV16K ST25DV64K

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DocID027603 Rev 4

Response parameter:

•

Error code as Error_flag is set:

–

02h: command not recognized

–

03h: command option not supported

–

0Fh: error with no information given

–

10h: the specified block is not available

–

15h: the specified block is read-protected

7.6.39

Fast Read Multiple Blocks

On receiving the Fast Read Multiple Blocks command, the ST25DVxxx reads the selected

blocks and sends back their value in multiples of 32 bits in the response. The blocks are

numbered from 00h up to the last block of user memory in the request, and the value is

minus one (–1) in the field. For example, if the “Number of blocks” field contains the value

06h, seven blocks are read. The maximum number of blocks is fixed to 256 assuming that

they are all located in the same area. If the number of blocks overlaps area or overlaps the

end of user memory, the ST25DVxxx returns an error code.

When the Option_flag is set, the response includes the Block Security Status. The data rate

of the response is multiplied by 2.

The subcarrier_flag should be set to 0, otherwise the ST25DVxxx answers with an error

code.

The Inventory_flag must be set to 0.

Block number is coded on 1 Byte and only first 256 blocks of ST25DV16K-xx and

ST25DV64K-xx can be addressed using this command.

Table 181. Fast Extended Read Single Block response format

when Error_flag is set

Response

SOF

Response_flags

Error code

CRC16

Response

EOF

8 bits

16 bits

Figure 67. Fast Extended Read Single Block frame exchange

between VCD and ST25DVxxx

VCD

SOF

Fast Extended Read

Single Block request

EOF

ST25DVxxx

<-t1-> SOF

Fast Extended

Read Single Block

response

EOF

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