ST25DV64K datasheet(85/197 Pages) STMICROELECTRONICS

85 / 197 page

Table 111. Block security status

Reserved for future use.

All at 0.

0: Current block not locked

1: Current block locked

Table 112. Extended Read Single Block response format when Error_flag is set

Response SOF

Response_flags

Error code

CRC16

Response EOF

8 bits

16 bits

Response parameter:

•

Error code as Error_flag is set

–

03h: command option not supported or no response

–

0Fh: error with no information

–

10h: the specified block is not available

–

15h: the specified block is read-protected

Figure 36. Extended Read Single Block frame exchange between VCD and ST25DVxxx

SOF

Extended Read

Single Block

request

VCD

ST25DVxxx

EOF

SOF

Extended Read

Single Block

response

EOF

7.6.8

Write Single Block

On receiving the Write Single Block command, the ST25DVxxx writes the data contained in the request to the

targeted block and reports whether the write operation was successful in the response. When the Option_flag is

set, wait for EOF to respond. The Inventory_flag must be set to 0.

During the RF write cycle Wt, there should be no modulation (neither 100% nor 10%), otherwise the ST25DVxxx

may not program correctly the data into the memory. The Wt time is equal to t1nom + N × 302 µs (N is an integer).

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 113. Write Single Block request format

Request SOF

Request_flags

Write Single Block

UID (1)

Block number

Data

CRC16

Request EOF

8 bits

21h

64 bits

8 bits

32 bits

16 bits

1. This field is optional.

Request parameters:

•

Request flags

•

UID (optional)

•

Block number

•

Data

ST25DV04K ST25DV16K ST25DV64K

RF commands

DS10925 - Rev 11

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