M24LR64-RDW6T2 STMICROELECTRONICS [STMicroelectronics], M24LR64-RDW6T2 Datasheet - Page 37
M24LR64-RDW6T2
Manufacturer Part Number
M24LR64-RDW6T2
Description
64 Kbit EEPROM with password protection & dual interface
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.M24LR64-RDW6T2.pdf
(128 pages)
- Current page: 37 of 128
- Download datasheet (2Mb)
M24LR64-R
6
7
User memory initial state
The device is delivered with all bits in the user memory array set to 1 (each byte contains
FFh).
RF device operation
The M24LR64-R is divided into 64 sectors of 32 blocks of 32 bits as shown in
sector can be individually read- and/or write-protected using a specific lock or password
command.
Read and Write operations are possible if the addressed block is not protected. During a
Write, the 32 bits of the block are replaced by the new 32-bit value.
The M24LR64-R also has a 64-bit block that is used to store the 64-bit unique identifier
(UID). The UID is compliant with the ISO 15963 description, and its value is used during the
anticollision sequence (Inventory). This block is not accessible by the user and its value is
written by ST on the production line.
The M24LR64-R also includes an AFI register in which the application family identifier is
stored, and a DSFID register in which the data storage family identifier used in the
anticollision algorithm is stored. The M24LR64-R has three additional 32-bit blocks in which
the password codes are stored.
Doc ID 15170 Rev 10
User memory initial state
Table
5. Each
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