M24LR64-R_1006 datasheet(91/128 Pages) STMICROELECTRONICS

91 / 128 page

M24LR64-R

Commands codes

Doc ID 15170 Rev 10

91/128

26.11

Lock DSFID

On receiving the Lock DSFID request, the M24LR64-R locks the DSFID value permanently.

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 lock correctly the DSFID value in memory. The Wt time

is equal to t1nom + 18 × 302 µs.

Request parameter:

●

UID (optional)

Response parameter:

●

No parameter.

Response parameter:

●

Error code as Error_flag is set:

–

03h: the option is not supported

–

0Fh: error with no information given

–

11h: the specified block is already locked and thus cannot be locked again

–

14h: the specified block was not successfully locked

Table 63.

Lock DSFID request format

Request

SOF

Request_

flags

Lock

DSFID

UID(1)

Gray means that the field is optional.

CRC16

Request

EOF

8 bits

2Ah

64 bits

16 bits

Table 64.

Lock DSFID response format when Error_flag is NOT set

Response

SOF

Response_flags

CRC16

Response

EOF

8 bits

16 bits

Table 65.

Lock DSFID response format when Error_flag is set

Response

SOF

Response_flags

Error code

CRC16

Response

EOF

8 bits

16 bits

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