M24LR16E-R datasheet(102/143 Pages) STMICROELECTRONICS

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Command codes

M24LR16E-R

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Doc ID 018932 Rev 8

Response parameter:

●

Error code as Error_flag is set:

–

03h: the option is not supported

–

10h: the specified block is not available

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

starts the Get Multiple Block Security Status command to the end of the M24LR16E-R

response.

When configured in the RF write in progress mode, the RF WIP/BUSY pin remains in high-Z

state.

26.14

Write-sector Password

On receiving the Write-sector Password command, the M24LR16E-R uses the data

contained in the request to write the password and reports whether the operation was

successful in the response. The Option_flag is supported.

During the RF write cycle time, Wt, there must be no modulation at all (neither 100% nor

10%), otherwise, the M24LR16E-R may not correctly program the data into the memory.

The Wt time is equal to t1nom + 18 × 302 µs. After a successful write, the new value of the

selected password is automatically activated. It is not required to present the new password

value until M24LR16E-R power-down.

Table 76.

Get Multiple Block Security Status response format when Error_flag is

set

Response

SOF

Response_

flags

Error code

CRC16

Response

EOF

8 bits

16 bits

Figure 66.

Get Multiple Block Security Status frame exchange between VCD and

M24LR16E-R

VCD

SOF

Get Multiple Block

Security Status

EOF

M24LR16E-R

<-t1-> SOF

Get Multiple Block

Security Status

EOF

Table 77.

Write-sector Password request format

Request

SOF

Request

_flags

Write-

sector

password

IC Mfg

code

UID(1)

Gray means that the field is optional.

Password

number

Data

CRC16

Request

EOF

8 bits

B1h

02h

64 bits

8 bits

32 bits

16 bits

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