m24lr64-r STMicroelectronics, m24lr64-r Datasheet - Page 18

• 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

User memory organization
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Figure 7.
Sector details
The M24LR64-R user memory is divided into 64 sectors. Each sector contains 1024 bits.
The protection scheme is described in
In RF mode, a sector provides 32 blocks of 32 bits. Each read and write access are done by
block. Read and write block accesses are controlled by a Sector Security Status byte that
defines the access rights to all the 32 blocks contained in the sector. If the sector is not
protected, a Write command updates the complete 32 bits of the selected block.
In I
modes. When protected by the corresponding I2C_Write_Lock bit, the entire sector is write-
protected. To access the user memory, the device select code used for any I
must have the E2 Chip Enable address at 0.
2
C mode, a sector provides 128 bytes that can be individually accessed in read and write
Memory sector organization
Sector
0
1
2
3
60
61
62
63
Doc ID 15170 Rev 9
1 Kbit EEPROM sector
1 Kbit EEPROM sector
1 Kbit EEPROM sector
1 Kbit EEPROM sector
1 Kbit EEPROM sector
1 Kbit EEPROM sector
1 Kbit EEPROM sector
1 Kbit EEPROM sector
I2C Password
RF Password 1
RF Password 2
RF Password 3
8 bit DSFID
64 bit UID
8 bit AFI
Section 4: System memory
Area
Sector security
status
5 bits
5 bits
5 bits
5 bits
5 bits
5 bits
5 bits
5 bits
System
System
System
System
System
System
System
area.
ai15124
2
C command
M24LR64-R