The RH850/F1K 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 768KB to 2MB and the package covers a wide range from 100 to 176 pins. Also, a CAN FD interface has been added and the CPU operating frequency operates at up to 120MHz. Design resources are available here to help you get your design to market as quickly as possible.


  • 32-bit single-chip microcontroller with G3KH CPU core
  • High computational processing power
  • 120MHz operating frequency
  • Internal flash memory from 768KB to 2MB
  • Wide variety of internal peripheral functions
  • CAN FD interface (premium products only)
  • Low power consumption
    • Low Power Sampler (LPS) polls signal inputs without CPU core interaction
    • DeepSTOP mode disables power to select circuits within the chip
  • Package options from 100 to 176 pins




  • Car Body
  • Body control module (BCM)
  • Automotive Gateway
  • Automotive HVAC
  • Automotive lighting modules


Security documentation can be released under NDA. Request Security Documents

  • F1K ICUSE User's Manual
  • Basic Security User's Manual
  • Secure Watchdog Timer User's Manual

Design & Development

Software & Tools

Software & Tools

Software title
Software type
Renesas MCAL
Renesas' MCAL (Microcontroller Abstraction Layer) software drivers can be obtained as a stand-alone software package.
Software Package 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
Code Flash Libraries (Flash Self Programming Libraries)
Libraries for the reprogramming of code area flash memory, including EEPROM emulation libraries for the code areas of 78K-family products
Self Programming Library (Flash Library) Renesas
Data Flash Libraries
Libraries for the reprogramming of data flash memory, including EEPROM emulation libraries for the data areas of RL78-family products
Self Programming Library (Flash Library) Renesas
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
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 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
Renesas Flash Programmer (Programming GUI)
Flash memory programming software [Support MCU/MPU and devices: RA, RE, RX, RL78, RH850, RISC-V MCU Renesas Synergy, DA1453x, DA1459x, DA1469x, DA1470x, Power Management, Renesas USB Power Delivery Family, ICs for Motor Driver/Actuator Driver, V850, 78K0R, 78K0]
Programmer (Unit/SW) Renesas
AP4, Applilet
Peripheral I/O driver generator compatible with third-party compilers and GNU compiler (for RZ, V850, RX, RL78, and 78K)
Code Generator Renesas
9 items

Software Downloads

Sample Code

Boards & Kits

Boards & Kits


Renesas Automotive TechDays 2019

Take a glimpse of the Automotive Tech Days 2019. A great chance for customers to interact with Renesas product experts and discover available Digital and Analog solutions.


Elmar Winter: We have done 14 TechDays for automotive customers. Eleven at our customer premises and three at our offices in Europe.

Carsten Jauch: Today, our teams have prepared lot of live demos, so I would really ask you to go in the deep, technical discussions with our experts to drive your innovation.

Elmar Winter: Renesas is in a transition from a pure semiconductor supplier to a more and more system solution provider. Today we are able to provide wide digital and analog solutions for all our customers.

For brushless DC motors, we control and drive with our MCU solutions the electronic commutation of BLDC motors.

With our inductive sensing solutions, we are able at the same time to sense precisely the position of the rotor and replace resolver solutions.

With our R-Car SoC solutions, our customers serve more and more solutions in the field of infotainment and ADAS.

In parallel, they use timing and PMIC solutions from Renesas and save development time.

A TechDay is a very efficient way to bring the right experts together. It's like a small congress at your location. If you are interested in such a TechDay in your premises, please get in touch with our sales team.