RA4E1 32-Bit Microcontroller Group Renesas Electronics RA4E1 32-Bit Microcontroller Group combines a high-performance 100MHz Arm® Cortex®-M33 core with ultra-low active power consumption. These MCUs feature up to 512KB Code Flash memory with background operation, 8KB Data Flash memory and 128KB SRAM with Parity. These highly integrated devices include a wide range of connectivity options, including USB 2.0 Full-Speed, SPI and Quad SPI, I2C and CAN2.0B. The RA4E1 MCUs also incorporate ARM TrustZone® security and safety features along with a 12-bit A/D Converter (ADC12) and a 12-bit D/A Converter (DAC12).