M24LR64-R-DW6T/2 STMICROELECTRONICS [STMicroelectronics], M24LR64-R-DW6T/2 Datasheet - Page 98

• Manufacturer Part Number: M24LR64-R-DW6T/2
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Commands codes
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Lock-sector Password
On receiving the Lock-sector Password command, the M24LR64-R sets the access rights
and permanently locks the selected sector. The Option_flag is supported.
A sector is selected by giving the address of one of its blocks in the Lock-sector Password
request (Sector number field). For example, addresses 0 to 31 are used to select sector 0
and addresses 32 to 63 are used to select sector 1. Care must be taken when issuing the
Lock-sector Password command as all the blocks belonging to the same sector are
automatically locked by a single command.
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.
During the RF write cycle W
otherwise, the M24LR64-R may not correctly lock the memory block.
The W
Table 76.
1. Gray means that the field is optional.
Request parameters:
●
●
●
Table 77.
Table 78.
Response parameter:
●
Table 79.
Request
Response
Response
SOF
SOF
SOF
b
(optional) UID
Sector number
Sector security status (refer to
No parameter.
0
7
t
time is equal to t
Request
_flags
8 bits
Lock-sector Password request format
Sector security status
Lock-sector Password response format when Error_flag is NOT set
Lock-sector Password response format when Error_flag is set
Response_
b
0
6
flags
8 bits
Response_flags
Password
sector
Lock-
B2h
8 bits
1nom
b
0
t
, there should be no modulation (neither 100% nor 10%)
5
+ 18 × 302 µs.
Doc ID 15170 Rev 8
Error code
code
Mfg
02h
IC
8 bits
Table
password control bits
b
4
77)
64 bits
UID
(1)
b
3
CRC16
number
16 bits
Sector
16 bits
Read / Write protection
CRC16
16 bits
b
2
security
Sector
status
8 bits
bits
b
1
CRC16
16 bits
M24LR64-R
Response
Response
Request
EOF
EOF
b
EOF
1
0