m24lr64-r STMicroelectronics, m24lr64-r Datasheet - Page 96

• Manufacturer Part Number: m24lr64-r
• Description: 64 Kbit Eeprom With Password Protection & Dual Interface 400 Khz I?c Serial Bus & Iso 15693 Rf Protocol At 13.56 Mhz
• Manufacturer: STMicroelectronics

Commands codes
26.14
96/126
Write-sector Password
On receiving the Write-sector Password command, the M24LR64-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, W
10%). Otherwise, the M24LR64-R may not correctly program the data into the memory. The
W
selected password is automatically activated. It is not required to present the new password
value until M24LR64-R power-down.
Table 73.
1. Gray means that the field is optional.
Request parameter:
●
●
●
Table 74.
Response parameter:
●
Table 75.
Response parameter:
●
Request
Response
Response
t
SOF
time is equal to t
SOF
SOF
UID (optional)
Password number (01h = Pswd1, 02h = Pswd2, 03h = Pswd3, other = Error)
Data
32-bit password value. The response is sent back after the write cycle.
Error code as Error_flag is set:
–
–
–
–
–
–
Request
02h: the command is not recognized, for example: a format error occurred
03h: the option is not supported
0Fh: error with no information given
10h: the specified block is not available
12h: the specified block is locked and its contents cannot be changed.
13h: the specified block was not successfully programmed
_flags
8 bits
Write-sector Password request format
Write-sector Password response format when Error_flag is NOT set
Write-sector Password response format when Error_flag is set
Response_
8 bits
flags
Password
Response_flags
sector
Write-
1nom
B1h
8 bits
+ 18 × 302 µs. After a successful write, the new value of the
IC Mfg
code
02h
Error code
Doc ID 15170 Rev 9
8 bits
t
, there must be no modulation at all (neither 100% nor
64 bits
UID
(1)
Password
number
8 bits
CRC16
16 bits
CRC16
16 bits
32 bits
Data
CRC16
16 bits
M24LR64-R
Response
Response
Request
EOF
EOF
EOF