The M24LR64-R is a Dual interface EEPROM with both an 13.56 MHz ISO 15693 RFID and a 400-kHz I2C interface. It is a good solution for RF-enabled sensors, as it allows access to sensor data in read and write mode without consuming any on-board power.
This document presents a practical application for the M24LR64-R datalogger, detailing how to build an autonomous, battery-powered device capable of recording and storing 64 Kbits of temperature data. The system utilizes the M24LR64-R Dual interface EEPROM (combining ISO 15693 RFID and I2C interfaces), an STM8L101K3 microcontroller, and an STTS75 digital temperature sensor.
| Memory capacity | 64 Kbits |
|---|---|
| RFID frequency | 13.56 MHz |
| I2C frequency | 400-kHz |
| Power supply | 3 V |
| Battery type | BR2330 |
The application uses the M24LR64-R Dual interface EEPROM, an STM8L101K3 microcontroller, and an STTS75 digital temperature sensor.
The datalogger is an autonomous battery-powered device supplied from a 3 V BR2330 battery fixed on the back side of the PCB.