M24LR64E-RDW6T/2 STMicroelectronics, M24LR64E-RDW6T/2 Datasheet - Page 30

• Manufacturer Part Number: M24LR64E-RDW6T/2
• Description: EEPROM 64Kbit EEProm 400kHz 13.56Mhz 1.8 to 5.5V
• Manufacturer: STMicroelectronics

Specifications of M24LR64E-RDW6T/2

• Rohs: yes
• Memory Size: 64 Kbit
• Organization: 8192 x 8
• Data Retention: 40 yr
• Maximum Clock Frequency: 400 kHz
• Maximum Operating Current: 20 uA
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 90 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-8
• Access Time: 900 ns
• Interface Type: I2C
• Minimum Operating Temperature: 0 C
• Operating Current: 20 uA
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 1.8 V

System memory area
4.3.3
Note:
4.3.4
4.3.5
4.4
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FIELD_ON indicator bit
The FIELD_ON indicator bit located as bit 1 of the Control register is a read-only bit used to
indicate when the RF power level delivered to the M24LR64E-R is sufficient to execute RF
commands.
During read access to the Control register in RF mode, the FIELD_ON bit is always read
at 1.
Configuration byte access in I²C and RF modes
In I²C mode, read and write accesses to the non-volatile Configuration byte are always
allowed. To access the Configuration byte, the device select code used for any I²C
command must have the E2 Chip enable address at 1.
The dedicated commands to access the Configuration byte in RF mode are:
After any write access to the Configuration byte, the new configuration is automatically
applied.
Control register access in I²C or RF mode
In I²C mode, read and write accesses to the volatile Control register are always allowed. To
access the Control register, the device select code used for any I²C command must have the
E2 Chip enable address at 1.
The dedicated commands to access the Control register in RF mode are:
ISO 15693 system parameters
The M24LR64E-R provides the system area required by the ISO 15693 RF protocol, as
shown in
The first 32-bit block starting from I
is used to activate/deactivate the write protection of the protected sector in I
When FIELD_ON = 0, the M24LR64E-R is not able to execute any RF commands.
When FIELD_ON =1, the M24LR64E-R is able to execute any RF commands.
Read configuration byte command (ReadCfg):
–
Write energy harvesting configuration command (WriteEHCfg):
–
Write RF WIP/BUSY pin configuration command (WriteDOCfg):
–
Check energy harvesting enable bit command (CheckEHEn):
–
Set/reset energy harvesting enable bit command (SetRstEHEn):
–
Table
The ReadCfg command is used to read the eight bits of the Configuration byte.
The WriteEHCfg command is used to write the EH_mode, EH_cfg1 and EH_cfg0
bits into the Configuration byte.
The WriteDOCfg command is used to write the RF WIP/BUSY bit into the
Configuration byte.
The CheckEHEn command is used to read the eight bits of the Control register.
When it is run, the FIELD_ON bit is always read at 1.
The SetRstEHEn command is used to set or reset the value of the EH_enable bit
into the Control register.
17.
Doc ID 022712 Rev 3
2
C address 2304 stores the I
2
C password. This password
2
C mode. At
M24LR64E-R