The RH850/C1M-Ax ASIL-C microcontroller is equipped with an RH850 Family G3MH CPU core, which operates at a frequency of 1x 240MHz for C1M-A1 and 2x 320MHz for C1M-A2, providing high processing power. Along with the ROM, RAM and DMA, it includes various timers such as a motor control timer, various serial interfaces including CAN (CAN FD compatible), a 12-bit A/D converter (ADC), an R/D converter (RDC3A) that converts position-sensor output signals into digital angle data and a parallel embedded motor control unit (EMU3), providing a peripheral function set that is ideal for motor control in HEV/EV traction-inverter applications. In addition, C1M-A2 can simultaneously control two motors, e.g. for a starter/generator system. Design resources are available here to help you bring your design to market as quickly as possible.


We have placed all related primary documentation on this page such as user's guides, application notes and collateral. In addition, there are links to Functional Safety and Security documentation requests which can be released under NDA.

Hardware Tools

In the Hardware Tools section, we provide links to the MCU starter kits. The starter kit is a fully self-contained hardware and software tool for evaluating microcontroller features and performance and can be used to start development. It includes the Renesas E1 on-chip debugger, access to all I/O pins and serial interfaces such as USB/UART, LIN/SENT, and CAN-FD. The starter kit is the fastest way to get the hardware and software needed to begin development right away. We provide links to the user's manual and software as well as a link to purchase.

Starter Kits

Starter Kit Description Featured Documents Ordering
Y-ASK-RH850C1M-A2 The RH850/C1M-A Starter Kit serves as a simple and easy to use platform for evaluating the features and performance of Renesas 32-bit RH850/C1M-A2 microcontrollers.
  • Connections for on-chip debugging and flash memory programming (Renesas E1 OCD Emulator included)
  • Access to all microcontroller I/O pins
  • User interaction through the potentiometers, buttons, LEDs
  • Serial interface connections for
    • 1x USB/UART
    • 1x LIN/SENT
    • 2x CAN-FD
  • Power supply by external power supply unit (included, 12V DC input)
  • Motor control features
    • Access to R/D (resolver-to-digital) converter
    • Output for motor control signals
    • Inputs for resolver signals for motor control
pdf_icon_for_table.png User's Manual

archive Software Package

pdf_icon_for_table.png Readme

Programming Tools

We also offer a newer and faster emulator for separate purchase. While there is a debugger included in the starter kit, we offer the option here to purchase the newer and faster E2 emulator/debugger for programming and debugging RH850 devices.

In addition to a hardware emulator/debugger, we also offer the Renesas Flash Programmer for free download. The Flash programmer contains a simple-to-use graphical user interface which is ideal for first-time developers.

Programming Tools Description Featured Documents Ordering
E2 Emulator On-chip debugging emulator for RH850 family and RL78 family. Also available as a flash memory programmer. pdf_icon_for_table.png User's Manual Contact Us
Renesas Flash Programmer
(Programming GUI)
The Renesas Flash Programmer provides usable and functional support for programming the on-chip flash memory of Renesas microcontrollers in each phase of development and mass production.
  • A simple GUI makes operations easy, even for first-time developers
  • PC-controlled programming via the E1 emulator or E2 emulator, a serial or USB connection
pdf_icon_for_table.png User's Manual Free Download

Software Tools

In the Software Tools section, we have many resources to assist with your MCU project.

For your compiler toolchain needs, we recommend Green Hills and IAR Systems. We provide links to these partner sites which allow you to start your design without delay.

And for designs that require AUTOSAR compliance, we offer AUTOSAR 4.2.2 MCAL (Microcontroller Abstraction Layer) software. It's absolutely free of charge and offered as-is. This package contains SPAL and COM.

We also offer a Model-based Development (MBD) solution. It's available for free download, and it provides support for simulation of a motor control unit.

Compiler Toolchain

Company Company Logo Description
Green Hills Multi
Green Hills Software Logo
RH850 Embedded Software Solutions
  • Multi development environments
    Quickly develop, debug, test, and optimize embedded and real-time applications
  • Green Hills Optimizing Compilers
    Generating the smallest and fastest code from C, C++, and Ada
  • simrh850
    Full-feature multi-core instruction-accurate simulation tool that allows faster development and deployment of V850 and RH850 multi-core projects. Support for various shared-memory and isolated architectures, as well as complete support for RH850 hyper-threading capabilities
IAR Systems
IAR Embedded Workbench provides extensive support for RH850 devices. IAR Embedded Workbench is a complete set of development tools with leading optimization technology for creating powerful automotive applications.

MCAL Software

Software Description Download
Renesas MCAL Renesas' MCAL (Microcontroller Abstraction Layer) software drivers can be obtained as a stand-alone software package. This package includes SPAL and COM based on AR4.2.2.
  • SPAL (including ADC, DIO, FLS, GPT, ICU, MCU, PORT, PWM, SPI, WDG)
  • COM (including CAN, LIN)
The software package is available free of charge and as is. In case you want to buy a different software package please contact us.
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MBD Solution

Software Description Featured Documents Download
Renesas IP Model for MILS

Renesas IP model for MILS is a model which realizes detailed functions of peripherals on MBD. It can be executed using the license key and the tools listed in the documentation.

  • Renesas IP BlockSet RH850/EMU3
  • Renesas IP BlockSet RH850/TSG3

The limited trial version software package is available free of charge and as is. In case you want to buy a different fully functional version software package please contact us.
Community: Renesas Rulz

pdf_icon_for_table.png Model Overview
pdf_icon_for_table.png Necessary Tools for IP Model
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Motor SW Driver Model Renesas' Motor SW Driver Model is a model which establishes compatibility of peripheral operations of MBD and C code. It can be executed using the license key and the tools listed in the documentation. The limited trial version software package is available free of charge and as is. In case you want to buy a different fully functional version software package please contact us.
Community: Renesas Rulz
pdf_icon_for_table.png Model Overview
pdf_icon_for_table.png Necessary Tools for SW Driver Model
archive Software

Smart Configurator

Software Description Featured Documents Download
Smart Configurator Smart Configurators are utilities for combining software in ways that meet your needs. They simplify the embedding of Renesas drivers in your systems through support for importing middleware and drivers and configuring pins. pdf_icon_for_table.png User's Manual
pdf_icon_for_table.png Guide on Sample Projects
pdf_icon_for_table.png Release Note
archive Software


In this section, we provide links to instructional videos, workshops, and other introductory materials.


In case you still can't find what you're looking for, we provide links to Frequently Asked Questions and Forums as well as support links to send an inquiry to a Renesas expert about our RH850 products.


FAQ Icon

RH850 Family FAQs

Find answers to common questions, support articles and development hints.

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Contact Support

Contact sales or technical support.

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RenesasRulz Forum

Browse material, post questions and join moderated discussion related to Renesas products.

Third-Party Support

We have an extensive list of software ecosystem partners, and we provide links to these partners. These are the experts who can help you get your design to market as fast and as reliably as possible.

Company Description  
Vector Informatik logo

The MICROSAR evaluation package includes the Vector basic software according to AUTOSAR Classic as well as all necessary software tools.

Learn More

MICROSAR Evaluation Package - Renesas RH850/C1M-A Starter Kits for AUTOSAR Classic