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M24LR64-R 数据表(PDF) 94 Page - STMicroelectronics

部件名 M24LR64-R
功能描述  64 Kbit EEPROM with password protection & dual interface: 400kHz I²C serial bus & ISO 18000-3 mode 1 RF protocol at 13.56MHz
PDF  126 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M24LR64-R 数据表(HTML) 94 Page - STMicroelectronics

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Commands codes
M24LR64-R
94/126
Doc ID 15170 Rev 9
26.13
Get Multiple Block Security Status
When receiving the Get Multiple Block Security Status command, the M24LR64-R sends
back the sector security status. The blocks are numbered from '00h to '07FFh' in the request
and the value is minus one (–1) in the field. For example, a value of '06' in the “Number of
blocks” field requests to return the security status of 7 blocks.
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 M24LR64-R response, if the internal block address counter reaches 07FFh, it
rolls over to 0000h and the Sector Security Status bytes for that location are sent back to the
reader.
Request parameter:
●
UID (optional)
●
First block number
●
Number of blocks
Response parameters:
●
Sector security status (see Table 71: Sector security status)
Table 69.
Get Multiple Block Security Status request format
Request
SOF
Request
_flags
Get
Multiple
Block
Security
Status
UID(1)
1.
Gray means that the field is optional.
First
block
number
Number
of blocks
CRC16
Request
EOF
8 bits
2Ch
64 bits
16 bits
16 bits
16 bits
Table 70.
Get Multiple Block Security Status response format when Error_flag is
NOT set
Response
SOF
Response_
flags
Sector security
status
CRC16
Response
EOF
8 bits
8 bits(1)
1.
Repeated as needed.
16 bits
Table 71.
Sector security status
b7
b6
b5
b4
b3
b2
b1
b0
Reserved for future use. All
at 0
password control
bits
Read / Write
protection bits
0: Current sector not locked
1: Current sector locked



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