X-NUCLEO-EEPRMA2 Memory Expansion Board STMicroelectronics X-NUCLEO-EEPRMA2 Memory Expansion Board is designed for M24xx I²C and M95xx SPI EEPROM for data reading and writing. The expansion board acts as an external storage device that can store data. This data includes manufacturing traceability, calibration, user setting, error flags, data log, and monitoring data to make applications more flexible and accurate. The X-NUCLEO-EEPRMA2 expansion board is compatible with the Arduino UNO R3 connector pin assignment. It can be easily connected to any STM32 Nucleo development board. ST morpho connectors can be mounted if required.