RA2E2 32-Bit Microcontroller Group Renesas Electronics RA2E2 32-Bit Microcontroller Group offers low-power operation and best-in-class power performance using an ARM Cortex-M23 core based on Armv8-M architecture. The RA2E2 provides innovative peripheral functions such as an I3C interface, EEPROM, HOCO, high current drive ports, 5V tolerant IO, TRNG, and AES.