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RA2A2 MCUs: 48MHz Arm Cortex-M23 Ultra-Low Power General-Purpose Microcontrollers with Rich Peripherals

RA2A2 Microcontroller Group
RA2A2 Microcontroller Group

Renesas Electronics Corporation has introduced the new RA2A2 microcontroller (MCU) Group based on the Arm Cortex-M23 processor that offers a 24-bit Sigma-Delta analog-to-digital converter (SDADC). These low-power devices feature an innovative dual-bank code flash and bank swap function that make it easy to implement firmware over-the-air (FOTA) updates for smart energy management, building automation, medical devices, consumer electronics, and other IoT applications that can benefit from firmware updates. The RA2A2 MCUs contribute to the digitalization of conventional systems with key features including high-level analog sensing, FOTA support, 8KHz/4KHz hybrid sampling, and AES hardware accelerator functions.

The RA2A2 devices offer multiple power structures and voltage detection hardware to realize energy-efficient, ultra-low power operation as low as 100 µA/MHz in active mode and 0.40µA in software standby mode. An independent power supply real-time clock extends battery life for applications requiring long lifetime management in extreme conditions. The new MCUs also offer AES hardware acceleration, a high-precision (±1.0%), a high-speed on-chip oscillator, a temperature sensor, and a wide operating voltage range from 1.6V to 5.5V.


  • 48 MHz Arm Cortex-M23 core

  • 512KB flash memory (dual bank) and 48KB SRAM

  • 8KB data flash memory (100,000 program/erase (P/E) cycles)

  • 64-pin, 80-pin, and 100-pin LFQFP package options

  • 24-bit Sigma-Delta A/D converter, 12-bit A/D converter and temperature sensor

  • 16-bit general-purpose timers, 32-bit and 16-bit low-power AGT timers, and independent power supply RTC

  • SCI (UART, Simple SPI, Simple I2C), SPI and I2C bus

  • Segment LCD controller (8com x 38seg)

  • Security functions including AES, Secure MPU, Flash Access Window, TRNG


  • Energy management devices

  • Industrial automation

  • Building automation

  • Home appliances

  • Medical and healthcare

  • Digital home appliances/consumer products

Component Datasheet

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