ST25TV02K datasheet(36/90 Pages) STMICROELECTRONICS

36 / 90 page

•

Error code as Error_flag is set

–

03h: command option not supported

–

10h: the specified block is not available

–

15h: the specified block is read-protected

Figure 11. Read Single Block frame exchange between VCD and ST25TV02K/512

SOF

Read Single Block

request

VCD

ST25TV02K/512

EOF

SOF

Read Single Block

response

EOF

6.4.7

Write Single Block

On receiving the Write Single Block command, the ST25TV02K/512 write 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.

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

ST25TV02K/512 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 ST25TV02K/512 can be addressed using this

command.

Table 48. 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. The field is optional.

Request parameters:

•

Request flags

•

UID (optional)

•

Block number

•

Data

Table 49. Write Single Block 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.

ST25TV02K ST25TV512

RF commands

DS12074 - Rev 11

page 36/90

ST25TV02K Datasheet(PDF) 36 Page - STMicroelectronics

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