ST25DV64K datasheet(140/220 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:

–

03h: Option not supported

–

0Fh: error with no information given

7.6.24

Get Multiple Block Security Status

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

back its security status for each address block: 0 when block is writable else 1 when block is

locked for writing. The blocks security status are defined by the area security status (and by

LCK_CCFILE register for blocks 0 and 1). 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 will 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.

Table 134. Response other field: ST25DVxxx VICC command list Byte 4

Bit

Meaning if bit is set

Comment

Read Buffer is supported

Means Response Buffer is supported

Select Secure State is supported

Means VCD or Mutual authentication

are supported

Final Response always includes crypto result

Means that flag b3 will be set in the

Final response

AuthComm crypto format is supported

SecureComm crypto format is supported

KeyUpdate is supported

Challenge is supported

If set to 1 a further Byte is transmitted

0 shall be returned

Table 135. Extended Get System Info response format when Error_flag is set

Response

SOF

Response_flags

Error code

CRC16

Response

EOF

01h

8 bits

16 bits

Figure 52. Extended Get System Info frame exchange

between VCD and ST25DVxxx

VCD

SOF

Extended Get

System Info

request

EOF

ST25DVxxx

<-t1-> SOF

Extended Get System

Info response

EOF

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