The RH850/F1KH-D8 is one group of single-chip microcontrollers in the RH850/F1x series, which is designed for automotive electrical body applications. While it achieves low power consumption, the internal flash memory ranges from 6MB to 8MB and the package covers a wide range from 176 to 324 pins. Also, CAN FD and Ethernet interfaces, along with a hardware security module have been added to all products, and the CPU operating frequency has been improved to 240MHz and is equipped with a dual CPU. Design resources are available here to help you get 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.

User Manuals

Collateral Materials

Application Notes

Functional Safety


  • F1Kx ICUMD User’s Manual
  • RH850/F1KM/F1KH Debugging Methods and Notes on Products Equipped with the ICU-M + ICUMD Challenge-Response Debugger Access Guidance

Request Security Documents

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 RS-232, LIN, 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-RH850F1KH-D8-V3 The RH850/F1KH-D8 Starter Kit serves as a simple and easy to use platform for evaluating the features and performance of Renesas Electronics’ 32-bit RH850/F1KH-D8
  • Connections for on-chip debugging and flash memory programming
  • Access to all microcontroller I/O pins
  • User interaction through the potentiometer, rotary switch, buttons, LEDs
  • Serial interface connections for
    • 1x RS-232
    • 1x LIN
    • 2x CAN-FD
    • 1x FlexRay
    • 1x Ethernet 100Base-T
  • Power supply by RENESAS E1 on-chip debugger or externally (12V DC input)
pdf_icon_for_table.png User's Manual

archive Software Package

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 F1Kx 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.

In addition, we offer libraries for programming both the code flash and data flash memories of the RH850 F1Kx microcontroller. These libraries provide an interface to the code and data flash for memory operations such as erasing, programming, blank checking, and more.

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, COM and TEST driver software.

We also offer driver generation software called Smart Configurator. It's available for free download, and it provides support in generating device drivers for peripherals such as timers, UART, A/D, and more. The software and user manuals for Smart Configurator are provided for your convenience.

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.

Software Libraries

Software Library Description Featured Documents Download
Code Flash Libraries Libraries for the reprogramming of code area flash memory, for the code areas of F1Kx products. This free-of-charge software library is for use with user programs that have to rewrite the contents of code flash memory. Self Programming Libraries provide the interface for operations on the code areas of flash memories that MCUs have.
  • Erasing
  • Programming
  • Internal verification
  • Blank checking
  • Security settings, etc.
pdf_icon_for_table.png User's Manual archiveLibrary
Data Flash Libraries Libraries for the reprogramming of data area flash memory, for the data areas of F1Kx products. This free-of-charge software library is for use with user programs that have to rewrite the contents of data flash memory. Data Flash Libraries provide the interface for operations on the areas of data flash memories that MCUs have.
  • Erasing
  • Programming
  • Internal verification
  • Blank checking
pdf_icon_for_table.png User's Manual archiveLibrary

MCAL Software

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

Software Tools

Software Description Featured Documents Download
Smart Configurator The Smart Configurator is a utility for combining software to meet your needs. It supports the following three functions related to the embedding of Renesas drivers in your systems: importing middleware, generating driver code, and generating code for making pin settings. pdf_icon_for_table.png User's Manual 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 F1Kx products.


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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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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
Elektrobit Logo

The EB tresos solution for RH850/F1Kx includes EB's basic software for Classic AUTOSAR ECUs, an integrated OS and MCAL as well as an easy-to-use tool set to configure and generate the software components.

Learn More

EB Tresos Solution for RH850/F1Kx
Tata Elxsi

Tata Elxsi supports Renesas customers during their development by providing MCAL service and support, including:

  • Frozen Branch Service
  • AUTOSAR Validation Service
  • Compiler Re-validation Service
Learn More
MCAL Support RH850/F1Kx