R-Car S4 enables to launch Car Server/CoGW with high performance, high-speed networking, high security and high functional safety levels that are required as E/E architectures evolve into domains and zones. The R-Car S4 solution allows designers to re-use up to 88 percent of software code developed for 3rd generation R-Car SoCs and RH850 MCU applications. The software package supports the real-time cores with various drivers and basic software such as Linux BSP and hypervisors.


  • Eight 1.2 GHz Cortex A55 cores, one 1.0 GHz Cortex® R52 dual core (lock-step) and two 400 MHz RH850 G4MH dual cores (lock-step) deliver up to 27 kDMIPS application performance plus greater than 5.3 kDMIPS real-time performance
  • Abundant automotive interfaces including 16x CAN FD, 16x LIN, 8x SENT, 1x FlexRay, 4x PCIe V4.0 allow a wide range of connectivity inside the vehicle
  • Integrated 3-port Ethernet TSN switch offers bandwidth of 3 x 2.5 Gbps to deliver fast and low-latency communication in the vehicle backbone and to the outside world
  • Incorporated 8MB SRAM to execute code on the RH850 G4MH core with low latency
  • Multiple hardware security modules (HSMs) and firewall IP provide enhanced security protection against cyber attacks
  • R-Car S4 is compliant to ISO-26262 and supports functional safety according to ASIL B and ASIL D



  • Vehicle computers
  • Communication gateways
  • Domain servers
  • Application servers


Title Type Date
PDF2.19 MB
PDF1.44 MB
PDF14.23 MB
Manual - Hardware
PDF116.32 MB
Manual - Hardware
White Paper

Design & Development

Software & Tools

Important Note
If you are using Security package, please download and use the following Linux SDK from Software Downloads: R-Car S4 SDK Linux PKG for security pkg

Software & Tools

Title Type Company
Debug and Trace Tools for Multi-DevicesThese tools facilitate the analysis and identification of the causes of problems that occur in the software that operates cooperatively on the CPUs of multiple devices. IDE and Coding Tool Renesas
Multi-Core Debug and Trace ToolMultiple heterogeneous processor cores (Arm core/ RH850 core) integrated in R-Car S4 can be debugged and traced simultaneously. This allows for shorter time to identify the cause and analyze problems in systems where multiple cores work together to achieve a function. IDE and Coding Tool Renesas
e² studio for R-CarIntegrated Software Development Environment. Innovative and Open Development Environment in order to ease SW Development for Computer Vision and Deep Learning Algorithms. New developers can download an evaluation licence for e² studio free of charge. For a commercial licence, please contact a Renesas representative. IDE and Coding Tool Renesas
High-Speed Simulator for Software DevelopmentA high-speed simulation environment based on QEMU. Simulator Renesas
R-Car Virtual PlatformThe R-Car Virtual Platform (VPF) accelerates in-vehicle software development for next-generation vehicles. Simulator Renesas
Renesas MCALRenesas' MCAL (Microcontroller Abstraction Layer) software drivers can be obtained as a stand-alone software package. Software Package Renesas
Distributed Processing Software for Multi-DevicesThis software maximizes the performance of hardware by distributing the functions of the application to multiple SoCs or CPUs and HWIPs inside the microcontroller. Solution Toolkit Renesas
Virtual Turnkey PlatformThe virtual turnkey platform is a software development kit (R-Car SDK) with pretested software libraries and sample code on the virtual development environment R-Car Virtual Platform (VPF). Solution Toolkit Renesas
Co-Simulation Environment for Multi-DevicesThis is a multi-device operation simulation environment that integrates a group of simulators such as the R-Car Virtual Platform that are provided for the individual devices to enable coordinated operation. Simulator MathWorks, Australian Semiconductor Technology Company, Synopsys
AosEdge Platform - Distribution Management Platform for Connected CarAosEdge is a V2C (Vehicle to Cloud) platform that can deliver and run software that provides a new UX (user experience) for connected cars. Software Package EPAM Systems, Inc.

Software Downloads

Title Type Date
ZIP4,689.54 MB
Software & Tools - Software
ZIP4,693.39 MB
Software & Tools - Software
ZIP39.90 MB
Software & Tools - Software
ZIP4,699.70 MB
Software & Tools - Software
ZIP52.59 MB
Software & Tools - Software
ZIP5.50 MB
Software & Tools - Software
ZIP73.77 MB
Software & Tools - Software

Boards & Kits

Boards & Kits


Videos & Training

Linux BSP Sample UART Part 1

Renesas provides the R-Car S4 SDK, software that runs on the R-Car S4 SoC.

This video, Part 1 of Linux BSP setup in the 'R-Car S4 Startup Guide', explains 'System Overview and Sample QSPI, GPIO drivers' as the following steps.

  • Introduce software structure of Linux BSP.
  • Build BSP Image using Yocto Recipe.
  • Introduce operation of QSPI driver.
  • Build and run sample application of GPIO.