Overview
Description
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 | 2025-12 | Dec 12, 2025 |
| 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
| Title |
|---|
| e² studio FAQs |
| Where can I find e² studio tutorial? |
| Project Migration from CS+ to e² studio |
Target Devices
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 |
|---|---|
| Renesas C Compiler Package for RL78 Family [CC-RL] |
|
| Open Source ・LLVM for Renesas RL78 |
|
| IAR IAR C/C++ Compiler for Renesas RL78 |
|
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
