M24LR64-R_1004 datasheet(102/126 Pages) STMICROELECTRONICS

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Commands codes

M24LR64-R

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Doc ID 15170 Rev 9

26.17

Fast Read Single Block

On receiving the Fast Read Single Block command, the M24LR64-R reads the requested

block and sends back its 32-bit value in the response. The Option_flag is supported. The

data rate of the response is multiplied by 2.

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.

Request parameters:

●

Option_flag

●

UID (optional)

●

Block number

Response parameters:

●

Sector security status if Option_flag is set (see Table 85)

●

4 bytes of block data

Table 83.

Fast Read Single Block request format

Request

SOF

Request_

flags

Fast Read

Single

Block

IC Mfg

code

UID(1)

Gray means that the field is optional.

Block

number

CRC16

Request

EOF

8 bits

C0h

02h

64 bits

16 bits

Table 84.

Fast Read Single Block response format when Error_flag is NOT set

Response

SOF

Response

_flags

Sector

security

status(1)

Gray means that the field is optional.

Data

CRC16

Response

EOF

8 bits

32 bits

16 bits

Table 85.

Sector security status

Reserved for future used. All

at 0

password control

bits

Read / Write

protection bits

0: Current sector not locked

1: Current sector locked

Table 86.

Fast Read Single Block response format when Error_flag is set

Response

SOF

Response_

flags

Error code

CRC16

Response

EOF

8 bits

16 bits

M24LR64-R_1004 Datasheet(PDF) 102 Page - STMicroelectronics

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