The RA2E2 Group is RA Family’s entry line single-chip microcontroller based on the 48-MHz Arm® Cortex®-M23 core with Renesas' innovative on-chip peripheral functions. RA2E2 Group offers ultra-low power operation and high speed serial communication with smallest package options of 20-pin and 24-pin QFN and 16-pin wafer-level CSP package, satisfying the needs of cost-sensitive and space-constrained applications. These RA2E2 Group microcontrollers enable extremely cost-effective designs for IoT sensor nodes, portable devices, industrial control, and any battery-operated application that requires developers to cut power consumption, cost and space.


  • 48MHz Arm® Cortex®-M23
  • Up to 64kB Flash Memory and 8kB SRAM
  • 2kB Data Flash to store data as in EEPROM
  • Scalable from 16-pin to 24-pin packages
  • Wide operating voltage range of 1.6V to 5.5V
  • Best-in-class Active/Standby power consumption in Arm Cortex-M23 microcontroller
  • 12-bit ADC, Temperature Sensor
  • 16-bit General PWM Timer, 32-bit Low power Asynchronous General Purpose Timer
  • I3C bus interface
  • SCI (UART, Simple SPI, Simple I2C)
  • SPI interface
  • Safety
  • Security and Encryption
  • 125 °C operating temperature support
  • Smallest package options (16-pin WLCSP, 20 and 24-pin HWQFN)




  • General purpose
  • IoT devices
  • Industrial automation, industrial sensors
  • Portable consumer devices
  • Home appliances
  • Building automation
  • Medical and healthcare
  • Wearable devices



Design & Development

Software & Tools

Software & Tools

Software title
Software type
Flexible Software Package (FSP)
FSP is an enhanced software package designed to provide easy-to-use, scalable, high-quality software for embedded system designs using Renesas RA Family of Arm Microcontrollers. Note: FSP with e² studio Installer (Platform Installer) will install the e² studio tool, FSP packs, GCC toolchain, and Segger J-Link drivers required to use this software. No additional installations are required.
Software Package Renesas
E2 emulator Lite [RTE0T0002LKCE00000R]
On-chip debugging emulator. Also available as a flash memory programmer. [Support MCU/MPU: RA, RE, RL78, RX, RISC-V MCU]
Emulator Renesas
E2 emulator [RTE0T00020KCE00000R]
On-chip debugging emulator. Also available as a flash memory programmer. [Support MCU/MPU: RA, RE, RH850, R-Car D1, RL78, RX, RISC-V MCU]
Emulator Renesas
RA Smart Configurator
The Renesas RA Smart Configurator (RA SC) is a desktop application that helps you in configuring software systems (including a Board Support Package (BSP), drivers, RTOS, and middleware) for RA-Family MCUs when you are using a third-party IDE and toolchain.
Solution Toolkit Renesas
Flash memory programmer [Programming software: Dedicated GUI-based software, the "FP6 Terminal"] [Support MCU/MPU and devices: RA, RE, RX, RL78, RH850, RISC-V MCU, Renesas Synergy, Power Management, Renesas USB Power Delivery Family, ICs for Motor Driver/Actuator Driver, SuperH RISC engine, V850, 78K, R8C]
Programmer (Unit/SW) Renesas
Renesas Flash Programmer (Programming GUI)
Flash memory programming software [Support MCU/MPU and devices: RA, RE, RX, RL78, RH850, RISC-V MCU Renesas Synergy, DA1459x, DA1469x, DA1470x, Power Management, Renesas USB Power Delivery Family, ICs for Motor Driver/Actuator Driver, V850, 78K0R, 78K0]
Programmer (Unit/SW) Renesas
e² studio - information for RA Family
Eclipse-based Renesas integrated development environment (IDE). [Support MCU/MPU: RA, RE, RX, RL78, RH850, Renesas Synergy, RZ]
IDE and Coding Tool Renesas
SEGGER emWin GUI Library for Renesas RA Products
SEGGER's emWin graphics library is a ready-to-use solution that provides a versatile and professional GUI platform for creating interactive and high-quality graphical user interfaces on any type of display for the Renesas RA family.
Imaging SEGGER
SEGGER J-Link and J-Trace PRO
The J-Link debug probes offer full support for RA Family MCUs. With their outstanding performance, robustness, and ease of use are widely recognized as the market-leading debug probes today.
Emulator SEGGER
IAR Embedded Workbench for Arm
IAR Embedded Workbench for Arm (EWARM) provides a complete development environment for Arm - including RA Family MCUs - generating fast, compact code and enabling you to take full control of your code.
IDE and Coding Tool IAR Systems
Arm® Keil® MDK
Arm® Keil® MDK is a comprehensive software development solution for Arm-based microcontrollers, including RA Family MCUs, containing all the components that you need to create, build, and debug embedded applications.
IDE and Coding Tool Arm® Keil® MDK Arm®
11 items

Sample Code

Boards & Kits

Boards & Kits


RA2E2 48MHz Arm® Cortex®-M23 MCUs with Ultra-Low Power Consumption

Watch an overview of the tiny, ultra-low power RA2E2 MCUs and see the innovative peripheral functions optimized for cost-sensitive and space-constrained IoT endpoint, wearable, medical, industrial automation and other consumer and home appliance applications. Visit renesas.com/RA2E2 for more details including documentation, samples and evaluation kits.

Pin Count / Memory Size

Flash/RAM64kB / 8kB
32kB / 8kB
16kB / 8kB
Pin Count