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.


  • CPU Core:
    • C1M-A1: 240MHz core (Inc. Lockstep dual core x1)
    • C1M-A2: 320MHz core x2 (Inc. Lockstep dual core x1)
    • FPU
  • Clock:
    • Main Oscillator: 20 MHz
    • PLL with selectable SSCG mode:  240 or 320 MHz
    • PLL without SSCG mode: 80 MHz
    • On-chip low-speed oscillator: 240 kHz
    • Data transfer: DMAC / DTS
  • Timer:
    • Timer array unit D (TAUD)  2 or 4 units
    • Timer array unit J (TAUJ)  1 or 2 units
    • Motor control timer (TSG3) 2 or 3 units
    • Encoder timer (ENCA) 2 units
  • Analog: SAR A/D Converter 30 or 48ch, 3 units
  • Communication Interfaces:
    • Clocked Serial Interface H (CSIH) 3 channels
    • CAN interface(RS-CANFD) 4 channels
    • LIN interface(RLIN3) 3 channels
    • Serial Communication Interface (SCI3) 3 channels
    • RSENT 4 channel
  • Motor Control:
    • Motor control timer (TSG3) 2 or 3 units
    • R/D converter (RDC3A) 1 or 2 units
    • Enhanced motor control unit (EMU3) 1 unit
  • Safety:
    • Multi-Input Signature Generator (MISG)
    • Clock Monitor
    • Watchdog Timer
    • Secure Watchdog Timer
    • Memory protection function
  • Power Supply Voltage:
    • 1.15 - 1.35 V (CPU core)
    • 4.5 - 5.5 V (I/O, System, AD converter, RD converter)
  • Temperature: Tj= -40 - +150°




Functional Safety and Security documentation can be released under NDA. Request Documents

  • Functional Safety Documentation
  • C1M-A1/2 SWDT User's Manual HW
  • C1M-A1/2 ICUS Driver User's Manual
  • C1M-A1/2 ICUS User's Manual HW

Design & Development

Software & Tools

Software & Tools

Software title
Software type
ETAS ASCET-DEVELOPER (ASCET 7) is a tool for developing application software for embedded systems using graphical models and textual programming notations.
Other Hardware ETAS Group
ETK / FETK / XETK – ECU Interfaces
The Ethernet-based ETK / FETK / XETK interfaces by ETAS provide direct access to the measurement variables and control parameters of an ECU.
Other Hardware ETAS Group
INCA tools are used for ECU development and test as well as for validation and calibration of electronically controlled systems in the vehicle, on the test bench, or in a virtual environment on the PC.
IDE and Coding Tool ETAS Group
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
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
RH850 Multicore Model-Based Environment [Embedded Target for RH850 Multicore]
The Embedded Target for RH850 Multicore is a RH850 model-based multicore environment that simplifies complex driving control for the autonomous-driving era. In addition to the multicore support of the PILS tool for automatic configuration of environments, Embedded Target for Renesas CS+, it can also be interlinked with a model-based parallelization tool from eSOL Co., Ltd.
Model-Based Development Renesas
Renesas MCAL
Renesas' MCAL (Microcontroller Abstraction Layer) software drivers can be obtained as a stand-alone software package.
Software Package Renesas
xEV Inverter Application Model & Software
An xEV (Electric Vehicle) runs on a motor or combination of motor and internal combustion engine, and the motor is controlled by the xEV Inverter. The “xEV Inverter Application Model and Software” provides a sample application model and software to control the motor, reducing software development effort and time during product development using the xEV inverter kit.
Software Package Renesas
IAR Embedded Workbench for Renesas RH850
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.
IDE and Coding Tool IAR Systems
Green Hills Multi
Multi development environments allow to quickly develop, debug, test, and optimize embedded and real-time applications. The Green Hills optimizing compilers generate the smallest and fastest code from C, C++, and Ada.
IDE and Coding Tool Green Hills Software LLC
RH850 Smart Configurator
RH850 Smart Configurator is an automatic driver generation tool for internal peripheral I/O modules through GUI settings.
Solution Toolkit Renesas
MBD Solution for RH850/C1M-Ax
The MBD solution for RH850/C1M-Ax connects the MCU peripheral IP model with the user model through an intuitive physical value interface and realizes seamless Model-Based Design (MBD) from simulation to embedding generated code into the actual hardware.
Model-Based Development Renesas
Green Hills MULTI Device-Support-Packages
Green Hills MULTI Device-Support-Packages include all device specific files to be used with the MULTI IDE.
IDE and Coding Tool Renesas
13 items

Software Downloads

Sample Code

Boards & Kits

Boards & Kits


xEV Inverter Reference Solution

Discover the reference solution to build world’s smallest 100KW class inverter for electric vehicles.

Recommended Peripheral Devices

Analog/Power DeviceRecommended ProductFeaturesFeatured DocumentOrdering
Power Management ICRAA270000KFTIdeal power solution for RH850/E1x/C1x. Integrated fault diagnosis and monitor functions.RAA270000KFT Data sheet (PDF)Contact Sales
Gate DriverR2A25110KSPIGBT Gate Driver with insulating function (micro-isolator), isolation voltage: 2.5KVrms, excessive current protection function, mirror clamp function, soft turnoff function, etc.R2A25110KSP Datasheet Rev.5.2 (PDF)Contact Sales