M24LR64-R_1006 datasheet(79/128 Pages) STMICROELECTRONICS

79 / 128 page

M24LR64-R

Commands codes

Doc ID 15170 Rev 10

79/128

26.4

Write Single Block

On receiving the Write Single Block command, the M24LR64-R writes the data contained in

the request to the requested block and reports whether the write operation was successful

in the response. The Protocol_extention_flag should be set to 1 for the M24LR64-R to

operate correctly. If the Protocol_extention_flag is at 0, the M24LR64-R answers with an

error code. The Option_flag is supported.

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

Otherwise, the M24LR64-R may not program correctly the data into the memory. The Wt

time is equal to t1nom + 18 × 302 µs.

Request parameters:

●

UID (optional)

●

Block number

●

Data

Response parameter:

●

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

Response parameter:

●

Error code as Error_flag is set:

–

03h: the option is 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

Table 41.

Write Single Block request format

Request

SOF

Request_

flags

Write

Single

Block

UID(1)

Gray means that the field is optional.

Block

number

Data

CRC16

Request

EOF

8 bits

21h

64 bits

16 bits

32 bits

16 bits

Table 42.

Write Single Block response format when Error_flag is NOT set

Response SOF

Response_flags

CRC16

Response EOF

8 bits

16 bits

Table 43.

Write Single Block response format when Error_flag is set

Response

SOF

Response_

flags

Error code

CRC16

Response

EOF

8 bits

16 bits

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