The Renesas RA4M3 group of 32-bit microcontrollers (MCUs) uses the high-performance Arm® Cortex®-M33 core with TrustZone. In concert with the secure crypto engine, it offers secure element functionality. The RA4M3 is built on a highly efficient 40nm process and is supported by an open and flexible ecosystem concept—the Flexible Software Package (FSP), built on FreeRTOS—and is expandable to use other RTOSes and middleware. The RA4M3 is suitable for IoT applications requiring vast communication options, future proof security, large embedded RAM, and low active power consumption down to 119µA/MHz running the CoreMark® algorithm from Flash.


  • 100MHz Arm Cortex-M33 with TrustZone
  • Secure element functionality
  • 512kB - 1MB Flash memory and 64kB SRAM with parity and 64kB SRAM with ECC
  • 8kB Data Flash to store data as in EEPROM
  • 1kB Stand-by SRAM
  • Scalable from 64-pin to 144-pin packages
  • Capacitive touch sensing unit (CTSU)
  • USB 2.0 Full Speed
  • CAN 2.0B
  • Quad SPI
  • SCI (UART, Simple SPI, Simple I2C)
  • SPI/I2C multi-master interface
  • SDHI and MMC


  • Enhanced security (fire detection, burglar detection, panel control)
  • Metering (electricity, automated meter reading)
  • Industry (robotics, door openers, sewing machines, vending machines, UPS)
  • HVAC (heating, air conditioning, boiler control)
  • General purpose

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
RA4M3 Group Datasheet 日本語 Datasheet PDF 1.08 MB
User Guides & Manuals
EK-RA4M3 Errata 日本語 Manual PDF 627 KB
EK-RA4M3 v1 User's Manual  日本語 Manual PDF 4.05 MB
EK-RA4M3 Quick Start Guide 日本語 Quick Start Guide PDF 2.60 MB
RA4M3 Group User's Manual: Hardware 日本語 Manual PDF 14.83 MB
Technical Updates
RA6M1 Group, RA6M2 Group, RA6M3 Group, RA6M4 Group, RA6T1 Group, VBATT minimum voltage level enhancement 日本語 Technical Update PDF 226 KB
RA family, Addition of register definition for Flash 日本語 Technical Update PDF 139 KB
Application Notes & White Papers
- EK-RA4M3 Example Project Bundle Application Note PDF 73 KB
RA Family IEC 60730/60335 Self Test Library for RA MCU (CM4_CM23) 日本語 Application Note PDF 1.73 MB
- RA Family IEC 60730/60335 Self Test Library for RA MCU (CM4_CM23) 日本語 Application Note PDF 1.73 MB
Bring Fast, Accurate Multitouch User Interfaces to Your Designs 日本語, 简体中文 White Paper PDF 660 KB
Notes on RA4M3 Group High-Temperature Operation Application Note PDF 176 KB
The Benefits of Using Arm® TrustZone® in Your Design 日本語, 简体中文 White Paper PDF 1.38 MB
EK-RA4M3 Example Project Bundle - Sample Code Sample Code ZIP 5.19 MB
e² studio 2021-01 installer (Offline installer) 日本語 Upgrade - IDE EXE 1,637.73 MB
e² studio 2021-01 Linux Host 日本語 Upgrade - IDE XZ 570.99 MB
- RA Family IEC 60730/60335 Self Test Library for RA MCU (CM4_CM23) 日本語 Sample Code ZIP 8.83 MB
RA Family IEC 60730/60335 Self Test Library for RA MCU (CM4_CM23) 日本語 Sample Code ZIP 8.83 MB
EK-RA4M3 v1 Design Package Design File ZIP 22.45 MB
Tool News
[Featured Tool] Introducing Renesas Flash Programmer Supporting TrustZone® in RA Family 日本語 Tool News - Featured Tool PDF 193 KB
[Notification] Renesas on-chip debugging emulators and flash programmers that support the RA4M3 group 日本語 Tool News - Notification PDF 306 KB
Renesas RA4M3 Group of 32-bit MCUs with Arm® Cortex®-M Core 日本語 Flyer PDF 423 KB
An Introduction to Renesas Advanced (RA) MCU Kits Presentations PPSX 24.34 MB
[Flyer] E2Emulator[RTE0T00020KCE00000R] 日本語, 简体中文 Flyer PDF 381 KB
[Flyer] Renesas Software and Tools Flash Memory Programmer PG-FP6 日本語, 简体中文 Flyer PDF 417 KB
Renesas RA Family of 32-bit MCUs with Arm® Cortex®-M Core Flyer 日本語 Flyer PDF 391 KB

Boards & Kits

Part Number Title Type Company
EK-RA4M3 RA4M3 MCU Group Evaluation Kit Evaluation Renesas

News & Additional Resources

Pin Count / Memory Size

1MB Flash
128kB RAM Size
768kB Flash
128kB RAM Size
512kB Flash
128kB RAM Size
Pin Count