M24LR64E-R datasheet(97/140 Pages) STMICROELECTRONICS

97 / 140 page

M24LR64E-R

Command codes

Doc ID 022712 Rev 3

97/140

Response parameter:

●

No parameter.

Response parameter:

●

Error code as Error_flag is set:

–

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

–

14h: the specified block was not successfully locked

When configured in the RF busy mode, the RF WIP/BUSY pin is tied to 0 from the SOF that

starts the Lock DSFID command to the end of the M24LR64E-R response.

When configured in the RF write in progress mode, the RF WIP/BUSY pin is tied to 0 for the

duration of the internal write cycle (from the end of a valid Lock DSFID command to the

beginning of the M24LR64E-R response).

26.12

Get System Info

When receiving the Get System Info command, the M24LR64E-R sends back its information

data in the response. The Option_flag is not supported. The Get System Info can be issued

in both Addressed and Non Addressed modes.

The Protocol_extension_flag can be set to 0 or 1. Table 70 and Table 72 show M24LR64E-R

response to the Get System Info command depending on the value of the

Protocol_extension_flag.

Table 68.

Lock DSFID response format when Error_flag is set

Response

SOF

Response_flags

Error code

CRC16

Response

EOF

8 bits

16 bits

Figure 64.

Lock DSFID frame exchange between VCD and M24LR64E-R

VCD

SOF

Lock

DSFID

request

EOF

M24LR64E-R

<-t1-> SOF

Lock DSFID

response

EOF

Lock sequence

when error

M24LR64E-R

<---------------- Wt -------------> SOF

Lock

DSFID

response

EOF

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