Overview
Description
Topics
e² studio supports the new device RL78/F22.
e² studio supports the new device RL78/F22.
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
| Architecture | Ver. | Released |
|---|---|---|
| 64-bit version | 2026-04.2 | May 20, 2026 |
| 32-bit version (Note1) | V7.8.0 | Apr 20, 2020 |
Note
- 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.
- Details of upgrade (See Tool News)
- Operating Environment
- How to install: User's Manual Chapter 2
Information on Usage
| Installation | Building and Debugging | Generating 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) | |
FAQ
Target Devices
Downloads
Please be sure to check software agreement before downloading e² studio installer.
Featured
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| Type | Title | Date |
| Upgrade - IDE | e² studio 2026-04.2 installer for Windows
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| Upgrade - IDE | e² studio 2026-04.2 installer for Linux
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| Upgrade - IDE | e² studio 2026-04.2 installer for macOS
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Documentation
Featured Documentation
Log in required to subscribe
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| Type | Title | Date |
| Release Note |
PDF
2.85 MB
The e² studio 2026-04.2 Release Note describes product information, supported devices and supported features such as toolchains, emulators, code generation (Smart Configurator), and Smart Manual. Refer to "What is new" section for new the features and improvements in this version. Notifications of known issues are found in 'Useful workarounds and information' and 'Open issues' section.
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| Tool News - Release |
PDF
174 KB
日本語
Tool news to announce the upgrade to the e² studio 2026-04.2. This document explains improvements of functionality and how to update. The main enhancements are upgrading eclipse/CDT, Smart Configurator and debugger features.
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| Tool News - Release | PDF 358 KB 日本語 | |
| Tool News - Release | PDF 176 KB 日本語 | |
| Tool News - Release | PDF 182 KB 日本語 | |
| Application Note |
PDF
777 KB
日本語
AI-generated Summary:
This section explains how to set up and build the CUnit testing framework in e² studio for Renesas CC-RX. It instructs downloading CUnit version 2.1-2, creating a new Renesas CC-RX C/C++ Library Project, and configuring the project settings. It details copying necessary source and header files into the project, adjusting compiler settings to use C99, and creating a custom time.h header due to CC-RX limitations. Finally, it guides building the project to generate the static library file CUnit.lib.
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| Application Note |
PDF
908 KB
日本語
AI-generated Summary:
This section explains how to set up and use CUnit version 2.1-2 with e² studio for Renesas RX using GCC. It details building the CUnit static library by downloading the package, creating a new Renesas RX C/C++ library project, configuring toolchain and device settings, and copying necessary source and header files. It also covers project configuration steps such as deleting unnecessary folders and adding include directories. Finally, it describes building the library to generate the static library file libCUnit.a, which can be used for unit testing in C/C++ projects.
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| Tool News - Release | PDF 316 KB 日本語 | |
| Release Note |
PDF
2.92 MB
The e² studio 2025-12 Release Note describes product information, supported devices and supported features such as toolchains, emulators, code generation (Smart Configurator), and Smart Manual. Refer to "What is new" section for new the features and improvements in this version. Notifications of known issues are found in 'Useful workarounds and information' and 'Open issues' section.
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| Tool News - Release |
PDF
174 KB
日本語
Tool news to announce the upgrade to the e² studio 2025-12. This document explains improvements of functionality and how to update. The main enhancements are Renesas 365 support and adding supported devices.
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| Flyer |
PDF
1.04 MB
日本語
, 简体中文
e² studio is an integrated development environment consisting of the Eclipse-standard code editor and various extended functions such as functions for referencing manuals and technical information, Smart Configurator, which facilitates code generation and QE tools aiding application development.
Facilitates all development processes up to building in a seamless manner within a single environment with a Renesas compiler.
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| Tool News - Release |
PDF
155 KB
日本語
This is the Tool News announcing the revision upgrade to QE for Capacitive Touch V4.2.0, Development Assistance Tool for Capacitive Touch Sensors.
QE for Capacitive Touch is a tool for assisting in the development of embedded systems that include the use of capacitive touch keys.
This tool simplifies the initial settings of the touch user interface and the tuning of the sensitivity.
The main revisions are improvements to the sensor drive pulse frequency determined by automatic tuning (CTSU2) and support for the new device "RA0L1 Group, RL78/F22, RL78/F25, and RL78/L23".
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| Tool News - Release |
PDF
150 KB
日本語
This is a Tool News announcing the revision of QE for Motor V1.5.1, Development Assistance Tool for Motor Applications.
QE for Motor is a development support tool that supports the development of embedded systems for motors that can be tuned and analyzed in conjunction with Renesas Motor Workbench, in addition to configuring the motor middleware and related drivers of Renesas microcontrollers.
The main revision upgrades is support for MCK-RA6T2 Version 2.
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| Release Note |
PDF
2.93 MB
The e² studio 2025-10 Release Note describes product information, supported devices and supported features such as toolchains, emulators, code generation (Smart Configurator), and Smart Manual. Refer to "What is new" section for new the features and improvements in this version. Notifications of known issues are found in 'Useful workarounds and information' and 'Open issues' section.
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| Tool News - Release |
PDF
163 KB
日本語
Tool news to announce the upgrade to the e² studio 2025-10. This document explains improvements of functionality and how to update. The main enhancements are updating the Smart Configurator (RX, RL78) and adding supported devices.
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| Tool News - Release | PDF 596 KB 日本語 | |
| Tool News - Release | PDF 442 KB 日本語 | |
| Release Note | PDF 3.25 MB | |
| Tool News - Release | PDF 184 KB 日本語 | |
| Tool News - Release | PDF 284 KB 日本語 | |
| Tool News - Release | PDF 261 KB 日本語 | |
| Release Note | PDF 3.09 MB | |
| Tool News - Release | PDF 194 KB 日本語 | |
| Manual - Development Tools | PDF 4.85 MB 日本語 | |
| Tool News - Release | PDF 144 KB 日本語 | |
| Release Note | PDF 3.22 MB | |
| Tool News - Release | PDF 174 KB 日本語 | |
| Tool News - Release | PDF 170 KB 日本語 | |
| Tool News - Release | PDF 147 KB 日本語 | |
| Release Note | PDF 3.27 MB | |
| Tool News - Release | PDF 191 KB 日本語 | |
| Tool News - Release | PDF 333 KB 日本語 | |
| Quick Start Guide | PDF 1.73 MB 日本語 | |
| Application Note |
PDF
666 KB
日本語
AI-generated Summary:
The document explains how to integrate and use IAR Systems compilers within the e² studio development environment for Renesas microcontrollers. It details the installation of IAR Embedded Workbench and IAR Eclipse plugins, project creation, build configuration, and build execution using IAR compilers. The guide focuses on the RA family with the IAR ARM compiler but applies similarly to other Renesas devices. It also recommends using standalone Flexible Software Package configurators for RA and RZ families to enhance development. The environment setup assumes Windows 10 64-bit, e² studio 2024-07, and IAR tools installed.
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| Release Note | PDF 3.64 MB | |
| Tool News - Release | PDF 181 KB 日本語 | |
| Application Note |
PDF
678 KB
日本語
AI-generated Summary:
This document explains how to use Doxygen within the e* studio integrated development environment. It details the confirmed environment setup, including Windows 10, e* studio 2024-04, Doxygen 1.8.16 bundled with the Eclox plugin, and Graphviz 11.0.0. It guides users through installing the Eclox plugin via Eclipse Marketplace and configuring the Doxygen version in e* studio preferences to generate documentation efficiently. The document notes that Doxygen, Eclox, and Graphviz are third-party open-source tools without Renesas technical support.
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| Tool News - Release | PDF 148 KB 日本語 | |
| Manual - Development Tools | PDF 8.52 MB 日本語 | |
| Tool News - Release | PDF 175 KB 日本語 | |
| Release Note | PDF 2.91 MB | |
| Application Note |
PDF
852 KB
日本語
AI-generated Summary:
Cyclomatic complexity measures the complexity of source code, indicating software quality by quantifying how complex the code is. Higher values suggest increased complexity and a greater chance of bugs. Using e² studio, cyclomatic complexity can be measured via two external tools: SourceMonitor and Lizard. These tools integrate with e² studio through its external tools feature, allowing users to measure and display complexity results directly within the IDE. The document details installation, configuration, and execution steps for both tools on a Windows 10 environment with e² studio 2024-01.
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| Tool News - Release | PDF 147 KB 日本語 | |
| Tool News - Release | PDF 913 KB 日本語 | |
| Release Note | PDF 2.64 MB | |
| Tool News - Release | PDF 170 KB 日本語 | |
| Application Note |
PDF
980 KB
日本語
AI-generated Summary:
e² studio allows users to install, update, and add features or toolchains without rerunning the installer. It supports three installation types: Lite, Standard, and Custom, catering to different user needs from basic editing to advanced debugging. Updates can be performed via the installer or through the built-in update function, though adding device families or features requires separate procedures. The update process involves checking for updates, accepting licenses, and restarting the IDE to complete installation.
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| Tool News - Release | PDF 176 KB 日本語 | |
| Tool News - Release | PDF 217 KB 日本語 | |
| Tool News - Release | PDF 154 KB 日本語 | |
| Guide | PDF 1.43 MB 日本語 | |
| Tool News - Release | PDF 176 KB 日本語 | |
| Tool News - Release | PDF 182 KB 日本語 | |
| Tool News - Note | PDF 183 KB 日本語 | |
| Tool News - Release | PDF 262 KB 日本語 | |
| Tool News - Release | PDF 129 KB 日本語 | |
| Tool News - Release | PDF 154 KB 日本語 | |
| Tool News - Release | PDF 127 KB 日本語 | |
| Application Note |
PDF
1.11 MB
日本語
AI-generated Summary:
This guide explains how to create and build CMake projects using e² studio. It covers installing necessary tools such as e² studio, CMake, and GNU Make, creating a new CMake project, and configuring the builder by disabling the default CDT Core Builder and adding CMake and Make commands. The instructions include setting up environment variables and specifying CMake command parameters to generate native build files from platform-independent CMakeLists.txt configurations.
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| Application Note |
PDF
2.26 MB
日本語
AI-generated Summary:
This document explains how to automate CUnit tests in Renesas e² studio using EGit and Jenkins. It covers creating a Git repository, pushing code changes via EGit, and setting up Jenkins to build and run CUnit tests automatically. The process includes configuring Jenkins to poll the repository, build the project, execute tests, and generate reports. It also details modifying the SampleC Unit project to link the CUnit static library and output test results to a file for automation.
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| Application Note |
PDF
2.00 MB
日本語
AI-generated Summary:
This section explains how to install and set up Jenkins on Windows 10 for standalone use. It covers downloading the Jenkins installer from the official site, running the installer, and starting Jenkins via localhost. The initial admin password is retrieved from a specific file to unlock Jenkins. Users can skip plugin installation initially and start using Jenkins immediately. It also describes how to add more users through the Jenkins UI under Manage Jenkins > Manage Users.
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| Tool News - Release | PDF 267 KB 日本語 | |
| Tool News - Release | PDF 207 KB 日本語 | |
| Tool News - Release | PDF 352 KB 日本語 | |
| Tool News - Release | PDF 190 KB 日本語 | |
| Application Note |
PDF
1.79 MB
日本語
AI-generated Summary:
This section explains how to install and configure EGit within the e² studio environment. It details selecting Git integration during e² studio installation, updating EGit via the Help menu, and adding the EGit update repository. The guide also covers setting user identification for Git commits by configuring user name and email in the preferences. Finally, it describes opening the EGit perspective to start using Git features within e² studio.
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| Tool News - Release | PDF 200 KB 日本語 | |
| Tool News - Notification | PDF 1023 KB 日本語 | |
| Tool News - Release | PDF 511 KB 日本語 | |
| Tool News - Note | PDF 183 KB 日本語 | |
| Tool News - Release | PDF 178 KB 日本語 | |
| Tool News - Release | PDF 160 KB 日本語 | |
| Tool News - Note | PDF 84 KB 日本語 | |
| Tool News - Note | PDF 227 KB 日本語 | |
| Tool News - Note | PDF 202 KB 日本語 | |
| Tool News - Note | PDF 114 KB 日本語 | |
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Design & Development
Explore
Videos & Training
This video demonstrates how to show or hide toolbar buttons for each perspective in e² studio.
Additional Details
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 name | Description |
|---|---|
| Smart Configurator | A GUI-based tool that provides support for downloading and importing middleware for code generation and configuring various settings |
| Smart Manual | A function that allows you to find various information in a hardware manual, such as on registers, without opening the actual hardware manual |
| Smart Browser | A 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 Optimization | A function that assists in optimizing the size of program code |
Note
- Only RL78/G2 and RL78/G24 are supported.
Compilers for the RL78 Family
| Supported Compiler | Information on usage |
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| Renesas C Compiler Package for RL78 Family [CC-RL] |
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| Open Source ・LLVM for Renesas RL78 |
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| IAR IAR C/C++ Compiler for Renesas RL78 |
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Note:
- 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
- Simulator for e² studio of RL78 Family (Note1)
- E2 Emulator (Note2)
- E2 Emulator Lite (Note2)
- E1 Emulator（Discontinued product)
- IECUBE for RL78 Family (Note2)
Note
- Installed in the e² studio as a standard item.
- Compatible with tools from IAR
QE: Tools for Particular Applications for the RL78 Family
Support
Support Communities
- e2 studio 2022-04
Hi Team, I have downloaded e² studio 2022-04 from the e² studio information for RL78 Family | Renesas. After installing it, I encountered an error when trying to add a new project: "No tool chain version selected," as shown in the attached image below. I also downloaded and installed the ...
Apr 10, 2025 - How to use R5F100AG mcu
... not support this mcu. In order to generate code I can use Applilet3 but it is a very old software and seems to be incompatible with the current version of e2studio and cs+.Have you got any suggestion for me?Wich is the way to write code for R5F100AG easily?
Jun 30, 2023 - RA family tool chains installation
... For RL78 and Rx family there's no problem in regards. In Renesas web site there are the specific packages we can get and preserve for future specific tool chain installation.For instance, RL78 Family C Compiler Package V1 (without IDE) V1.10.00 For RA family, however, I'm ...
Jul 16, 2022
Knowledge Base
- Where Can I Find the e² studio Tutorials?
... e2 studio for RA Family: https://www.renesas.com/e2studio-rae2 studio for RZ Family: https://www.renesas.com/e2studio-rze2 studio for RL78 Family: https://www.renesas.com/e2studio-rl78e2 studio for RX Family : https://www.renesas.com ...
Dec 28, 2022 - Can I use CA78K0R compiler for RL78 in e² studio
... CC-RL) for the RL78 family to perform build operation in e² studio. Additionally, load modules output by the CA78K0R compiler cannot be debugged in e² studio, and therefore you need the CC-RL build environment for debugging. Support information for migration from CA78K0R to CC-RL is also posted ...
Jun 28, 2017 - Output Assembler Source File with C Source Information (CC-RL)
... asmopt=-prn_path)] in the [Output assembly source file] property. -When using e2 studio Open the project properties setting dialog box and click [C/C++ Build] -> [Settings]. Then, from the [Tool Settings] tab, select [Compiler] -> [Object], and then select the check box for the [Output assemble source file] property.
Feb 7, 2020
Support Communities
Get quick technical support online from Renesas Engineering Community technical staff.
Knowledge Base
Browse our knowledge base for helpful articles, FAQs, and other useful resources.
