A complete line of high-quality software, high spec, easy-to-use development tools, and various boards and kits are offered for the RL78 Family development environment.

This fully designed development environment helps you develop your system more effectively and efficiently; it reduces development time and cost, yet improves the quality of the system. Furthermore, Renesas offers products from our partners which also enable a development environment that best fits your needs.

RL78 Family Development Environment

RL78 Development Environment


Our development tools for the automatic generation of code for timers and serial interfaces will help jump-start your development.

We also offer a real-time OS and various middleware. These major items range from general-purpose middleware for flash self-programming, encryption and audio playback, to more specialized middleware such as a protocol stack to support Bluetooth® Low Energy (BLE) on the RL78/G1D microcontroller (MCU) and a communications stack to support sub-GHz communications for the RL78/G1H MCU. The middleware will help you concentrate on developing your application.

Development Environment for RL78 Family Software

Development Tool

Renesas offers two types of integrated development environments, e2 studio and CS+. These development environments provide easy operation of all of the basic functions from coding through building and debugging, contributing to shortening the development time. The features for the IDEs are listed below.

Main Features — IDEs

e2 studio and CS+ e2 studio CS+
  • Easy to use graphical interface
  • Powerful editor function
  • High spec compiler
  • Code generating function by GUI
  • Usable static code analysis
  • QE tool for the particular applications
  • Import and export function of projects
  • IDE based on the open source Eclipse
  • Many extended plug-in functions
  • Renesas smart utilities
    • Smart Manual
    • Smart Browser
    • Assistant for optimization
    • Current consumption measurement
  • Renesas originally designed IDE
  • Smart functions
    • Smart Manual
    • Smart Browser
    • Smart Reports
    • Comparing tool for optimization
    • Current consumption measurement

Smart functions, such as the Smart Manual and Smart Browser are available to assist you with various reference and similar processes, and tools, including Quick and Effective tool solutions (QE tools) to support debugging when developing solutions for motor control, BLE, USB, and other fields, provide strong support in system development.

We provide an RL78 Web Simulator to assist in the early evaluation of development free of charge. This is also suitable for estimating consumption current by battery-powered equipment in which an RL78 MCU is used.

Development Tools

Boards & Kits

We recommend Renesas starter kits as affordable development tool kits for evaluating the RL78 Family of MCUs, CPU boards as a quick and easy way to try out the operation of RL78 MCUs, and evaluation boards for specialized fields.

Boards and Kits

Documentation & Downloads

Title language Type Format File Size Date
Renesas RL78 Family Microcontrollers Brochure 日本語 Flyer PDF 4.88 MB

News & Additional Resources