ST25DV64K datasheet(159/220 Pages) STMICROELECTRONICS

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ST25DV04K ST25DV16K ST25DV64K

RF operations

219

7.6.38

Fast Extended Read Single Block

On receiving the Fast Extended Read Single Block command, the ST25DVxxx reads the

requested block and sends back its 32-bit value in the response. 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 2 Bytes so all memory blocks of ST25DV16K-xx and

ST25DV64K-xx can be addressed using this command

Request parameters:

•

Request flags

•

UID (optional)

•

Block number

Response parameters:

•

Block security status if Option_flag is set (see Table 176: Block security status)

•

Four bytes of block data

Table 178. Fast Extended Read Single Block request format

Request

SOF

Request_flags

Fast

Extended

Read Single

Block

IC Mfg

code

UID(1)

1. Gray color means that the field is optional.

Block

number

CRC16

Request

EOF

-8 bits

C4h

02h

64 bits

16 bits

Table 179. Fast Extended Read Single Block response format

when Error_flag is NOT set

Response

SOF

Response_flags

Block security

status(1)

1. Gray color means that the field is optional.

Data

CRC16

Response

EOF

-8 bits

8 bits

32 bits

16 bits

Table 180. Block security status

Reserved for future use

All at 0

0: Current Block not locked

1: Current Block locked

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