M24LR04E-R datasheet(107/142 Pages) STMICROELECTRONICS

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M24LR04E-R

Command codes

Doc ID 022208 Rev 5

107/142

26.17

Fast Read Single Block

On receiving the Fast Read Single Block command, the M24LR04E-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_extension_flag should be set to 0 for the M24LR04E-R to operate correctly.

The subcarrier_flag should be set to 0, otherwise the M24LR04E-R answers with an error

code.

Request parameters:

●

Request flags

●

UID (optional)

●

Block number

Response parameters:

●

Sector security status if Option_flag is set (see Table 88)

●

Four bytes of block data

Table 86.

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

8 bits

16 bits

Table 87.

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 88.

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 89.

Fast Read 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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