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M24LR64E-R Datasheet(PDF) 24 Page - STMicroelectronics

Part # M24LR64E-R
Description  64-Kbit EEPROM with password protection, dual interface & energy harvesting: 400 kHz I²C bus & ISO 15693 RF protocol at 13.56 MHz
PDF  140 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M24LR64E-R Datasheet(HTML) 24 Page - STMicroelectronics

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System memory area
M24LR64E-R
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Doc ID 022712 Rev 3
4
System memory area
4.1
M24LR64E-R block security in RF mode
The M24LR64E-R provides a special protection mechanism based on passwords. In RF
mode, each memory sector of the M24LR64E-R can be individually protected by one out of
three available passwords, and each sector can also have Read/Write access conditions
set.
Each memory sector of the M24LR64E-R is assigned with a Sector security status byte
including a Sector Lock bit, two Password Control bits and two Read/Write protection bits,
as shown in Table 7.
Table 6 describes the organization of the Sector security status byte, which can be read
using the Read Single Block and Read Multiple Block commands with the Option_flag set
to 1.
On delivery, the default value of the SSS bytes is set to 00h.
Table 6.
Sector security status byte area
I2C byte address
Bits [31:24]
Bits [23:16]
Bits [15:8]
Bits [7:0]
E2 = 1
0
SSS 3
SSS 2
SSS 1
SSS 0
E2 = 1
4
SSS 7
SSS 6
SSS 5
SSS 4
E2 = 1
8
SSS 11
SSS 10
SSS 9
SSS 8
E2 = 1
12
SSS 15
SSS 14
SSS 13
SSS 12
E2 = 1
16
SSS 19
SSS 18
SSS 17
SSS 16
E2 = 1
20
SSS 23
SSS 22
SSS 21
SSS 20
E2 = 1
24
SSS 27
SSS 26
SSS 25
SSS 24
E2 = 1
28
SSS 31
SSS 30
SSS 29
SSS 28
E2 = 1
32
SSS 35
SSS 34
SSS 33
SSS 32
E2 = 1
36
SSS 39
SSS 38
SSS 37
SSS 36
E2 = 1
40
SSS 43
SSS 42
SSS 41
SSS 40
E2 = 1
44
SSS 47
SSS 46
SSS 45
SSS 44
E2 = 1
48
SSS 51
SSS 50
SSS 49
SSS 48
E2 = 1
52
SSS 55
SSS 54
SSS 53
SSS 52
E2 = 1
56
SSS 59
SSS 58
SSS 57
SSS 56
E2 = 1
60
SSS 63
SSS 62
SSS 61
SSS 60
Table 7.
Sector security status byte organization
b7
b6
b5
b4
b3
b2
b1
b0
0
0
0
Password control bits
Read / Write
protection bits
Sector
Lock



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