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[Upgraded to Version] e² studio 2024-04 (PDF | English, 日本語)
Supports CC-RL V1.13.01 for Linux hosted.

e² studio is an Eclipse-based integrated development environment (IDE) for Renesas MCUs. In addition to Eclipse’s own powerful code editor, e² studio offers a rich range of extended functions. e² studio covers all development processes, from the downloading of sample code to debugging.


Release Information

64-bit version2024-04Apr 22, 2024
32-bit version (Note1)V7.8.0Apr 20, 2020


  1. Henceforth, only the 64-bit version of the e² studio is to have regular updates. Updates to the 32-bit version of the e² studio, on the other hand, will be limited to essential modifications.

Information on Usage

InstallationBuilding and DebuggingGenerating Code
e² studio Integrated Development Environment User's Manual: Getting Started Guide RX, RL78, RH850 Family Rev.1.00 (PDF | English, 日本語)See Chapter 3 and subsequent chapters of the AP4, Applilet3 Common Operations User's Manual (PDF | English, 日本語)



e² studio FAQs
Where can I find e² studio tutorial?
Project Migration from CS+ to e² studio

See all related FAQs

Target Devices


Type Title Date
Upgrade - IDE Log in to Download ZIP 1,587.34 MB 日本語
Upgrade - IDE Log in to Download RUN 1,571.90 MB 日本語
Upgrade - IDE Log in to Download XZ 700.09 MB 日本語
3 items


Design & Development

e² studio Tips - How to change the device in the project

This video shows how to change the device in the e² studio project.
e² studio: https://www.renesas.com/software-tool/e-studio

Video List

Additional Details

e² studio

See the table below for features of the software and tools available for use with the e² studio on RL78-family products.
For an overview of the functions and features of the e² studio, refer to e² studio (the general page).

Code generation support and other useful functions for the RL78 family

Tool nameDescription
Smart ConfiguratorA GUI-based tool that provides support for downloading and importing middleware for code generation and configuring various settings
Smart ManualA function that allows you to find various information in a hardware manual, such as on registers, without opening the actual hardware manual
Smart BrowserA function that allows you to easily search and show the latest version of the hardware manual, technical updates, application notes, and tool news for the Renesas microcontroller you are using
Assistant for OptimizationA function that assists in optimizing the size of program code


  1. Only RL78/G2 and RL78/G24 are supported.


Compilers for the RL78 Family

Supported CompilerInformation on usage
C Compiler Package for RL78 Family [CC-RL]
  • The version numbers which can be used with the e² studio:
    • For Windows: V1.01.00 and later versions
    • For Linux: V1.13.01 and later versions (Note1)
Open Source
・LLVM for Renesas RL78
・GCC for Renesas RL78
  • The GNU compilers can be installed through selection with the installer of the e² studio. This requires an Internet connection.
  • The GNU compilers can be installed free of charge by downloading from the GNU Web site (https://llvm-gcc-renesas.com).
    Registration of these compilers with an e² studio which has already been installed is required.
  • LLVM for Renesas RL78 is available for 2021-04 and later versions of the e² studio.
IAR C/C++ Compiler for Renesas RL78
  • Debugging with the e² studio requires the building of load modules in the ELF/DWARF format.
  • IAR Systems provides plug-ins to handle projects for IAR compilers with Eclipse.
  • Contact IAR Systems K.K. for details:https://www.iar.com 


  1. CC-RL V1.13.01 supports Ubuntu version 20.04. Support for other versions of Ubuntu is under consideration for the next version.

Debugging tools for the RL78 Family


  1. Installed in the e² studio as a standard item.
  2. Compatible with tools from IAR


QE: Tools for Particular Applications for the RL78 Family

Details: QE(Quick and Effective tool solution)