ST25DV64K datasheet(112/200 Pages) STMICROELECTRONICS

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Figure 53. Get Multiple Block Security Status frame exchange between VCD and ST25DVxxx

SOF

Get Multiple Block

Security request

status

VCD

ST25DVxxx

EOF

SOF

Get Multiple Block

Security response

status

EOF

7.6.25

Extended Get Multiple Block Security Status

When receiving the Extended Get Multiple Block Security Status command, the ST25DVxxx sends back the

security status for each address block: 0 when the block is writable else 1 when block is locked for writing. The

block security statuses are defined by the area security status. The blocks are numbered from 00h up to the

maximum memory block number in the request, and the value is minus one (–1) in the field. For example, a value

of '06' in the “Number of blocks” field requests to return the security status of seven blocks.

This command does not respond an error if number of blocks overlap areas or overlap the end of the user

memory.

The number of blocks is coded on 2 Bytes so all memory blocks of ST25DV16K-xx and ST25DV64K-xx can be

addressed using this command.

The Option_flag is not supported. The Inventory_flag must be set to 0.

Table 177. Extended Get Multiple Block Security Status request format

Request

SOF

Request_flags

Extended

Get Multiple

Block

Security

Status

UID (1)

First block

number

Number of

blocks

CRC16

Request

EOF

8 bits

3Ch

64 bits

16 bits

1. This field is optional.

Request parameter:

•

Request flags

•

UID (optional)

•

First block number (from LSB byte to MSB byte)

•

Number of blocks (from LSB byte to MSB byte)

Table 178. Extended Get Multiple Block Security Status response format when Error_flags NOT set

Response SOF

Response_flags

Block security status

CRC16

Response EOF

8 bits

8 bits (1)

16 bits

1. Repeated as needed.

Response parameters:

•

Block security status

ST25DV04K ST25DV16K ST25DV64K

RF commands

DS10925 - Rev 9

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