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RL78 Series 8 and 16-bit MCUs

This page is for the Renesas RL78 family of MCUs. The main goal is to make the information about RL78 MCUs friendly, easy to access for embedded developers.

The links below can be used to get familiar with Renesas RL78 MCUs. 

Getting Started with RL78

Here are the resources for RL78 MCUs on Renesas Website.

Sample code for RL78 can be found here.  

Other resources on Renesas Website.  Links below are pre-configured searches.  You can modify them as needed.  

e2studio and CS+ are the Renesas supported IDEs.  Note that in Americas region, only e2studio is supported. You can also use Embedded Workbench for RL78. 

Supported toolchains are Renesas CC-RL, IAR C/C++ Compiler for RL78, and LLVM for Renesas RL78.  3rd party IDEs and toolchains are supported by respective partner companies. 

Boards

RL78 series boards are available here. There are several types of boards are available:

  • Renesas Starter Kits (RSK)
  • Fast Prototyping Boards (FPB)
  • Target Boards (CPU Boards)
  • Evaluation Boards for Specific Field 

Your First RL78 Project

Your first RL78 blinky project.

The following describes the procedure for creating a C project using the Smart Configurator in e2studio IDE. â€‹

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(1) Select [File] → [New] → [Renesas C/C++ Project] → [Renesas RL78] to activate the project creation wizard.

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(2) In the project creation wizard, select [Renesas RL78] → [Renesas CC-RL C Executable Project] or [LLVM for Renesas RL78 C/C++ Executable Project], and click on the [Next] button. ​

 

(3) Enter project information (Give the project a name – no spaces or special characters.). Click on the [Next] button to continue.

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(4) Select the toolchain, device, and debug configuration. Click on the [Next] button. (e.g. Target Device: RL78G23 – 64 pins (Part number: R7F100GLGxFB)) ​

 

Tips and Tricks

RL78 Tips and Tricks page contains many useful information and how to notes on everything RL78.  We update the page regularly so come and check it often.   

Known Issues and Workarounds

RL78 Issues page lists known bugs and possible workarounds for HW, SW, and tools.  


RL78 Specific Topics

Note that detailed topics are discussed in their own pages for easy navigation.  

RL78 Topic 1

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RL78 Topic 2

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