ST25DV64K datasheet(89/200 Pages) STMICROELECTRONICS

89 / 200 page

7.6.9

Extended Write Single Block

On receiving the Extended Write Single 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 116. Extended Write Single request format

Request SOF Request_flags Extended Write Single Block UID (1) Block number

Data

CRC16 Request EOF

8 bits

31h

64 bits 16 bits

32 bits 16 bits

1. This field is optional.

Request parameters:

•

Request flags

•

UID (optional)

•

Block number (from LSB byte to MSB byte)

•

Data (from LSB byte to MSB byte)

Table 117. Extended Write Single response format when Error_flag is NOT set

Response SOF

Response_flags

CRC16

Response EOF

8 bits

16 bits

Response parameter:

•

No parameter. The response is sent back after the writing cycle.

Table 118. Extended Write Single 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

–

0Fh: error with no information given

–

10h: the specified block is not available

–

12h: the specified block is locked and its contents cannot be changed

–

13h: the specified block was not successfully programmed

ST25DV04K ST25DV16K ST25DV64K

RF commands

DS10925 - Rev 9

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