RA2 Family Arm® Cortex® Microcontrollers Renesas Electronics RA2 Family Arm® Cortex® Microcontrollers are entry-level 32-bit MCUs offering excellent cost, performance, and ultra-low power consumption as part of the Renesas RA Family. The RA2 MCUs support up to 48MHz of CPU performance using an Arm Cortex-M23 core with up to 256KB of embedded flash memory. The RA2 has a wide single voltage supply range from 1.6V to 5.5V.