M24LR64-RDW6T/2 STMicroelectronics, M24LR64-RDW6T/2 Datasheet - Page 57

• Manufacturer Part Number: M24LR64-RDW6T/2
• Description: 13.56MHZ 64KBIT EEPROM 8 TSSOP
• Manufacturer: STMicroelectronics

Specifications of M24LR64-RDW6T/2

• Featured Product: STM32 Cortex-M3 Companion Products
• Rf Type: Read / Write
• Frequency: 13.56MHz
• Features: 64 Kbit EEPROM
• Package / Case: 8-TSSOP
• Memory Size: 64 KB
• Organization: 2 K x 32
• Interface Type: I2C
• Maximum Clock Frequency: 400 KHz
• Access Time: 900 ns
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.8 V
• Maximum Operating Current: 600 uA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10487-2

M24LR64-R
15
15.1
Data storage format identifier (DSFID)
The data storage format identifier indicates how the data is structured in the M24LR64-R
memory. The logical organization of data can be known instantly using the DSFID. It can be
programmed and locked using the Write DSFID and Lock DSFID commands.
CRC
The CRC used in the M24LR64-R is calculated as per the definition in ISO/IEC 13239. The
initial register contents are all ones: “FFFF”.
The two-byte CRC are appended to each request and response, within each frame, before
the EOF. The CRC is calculated on all the bytes after the SOF up to the CRC field.
Upon reception of a request from the VCD, the M24LR64-R verifies that the CRC value is
valid. If it is invalid, the M24LR64-R discards the frame and does not answer to the VCD.
Upon reception of a Response from the M24LR64-R, it is recommended that the VCD
verifies whether the CRC value is valid. If it is invalid, actions to be performed are left to the
discretion of the VCD designer.
The CRC is transmitted least significant byte first. Each byte is transmitted least significant
bit first.
Table 19.
LSBit
CRC transmission rules
CRC 16 (8 bits)
LSByte
Doc ID 15170 Rev 12
MSBit
LSBit
Data storage format identifier (DSFID)
CRC 16 (8 bits)
MSByte
MSBit
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