Introduction

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. 

• RL78 Low Power 8 & 16-Bit MCUs

Getting Started with RL78

Here are the resources for RL78 MCUs on Renesas Website.

• RL78 Family Development Environment — Software
• Code Generator Plug-in
• RL78 Smart Configurator (for newer MCUs)

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.  

• User Manuals
• Boards & Kits
• Tools
• IBIS Models

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.  

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

FAQs

RL78 FAQs 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

Feedback

You can use below link to provide feedback.  Here is the process:

Microcontroller Customer Portal

1. Login your OJF account
2. Create a TASK ticket (same as before)
3. Fillin Summary and Description fields (same as before)
   1. Provide  a detailed description
   2. Copy heading links from the Table of Contents in each page and paste it in your Description (this is important so we can locate your feedback on Renesas Wiki)
4. Select "Documentation" from the Components pulldown
5. Select "RENESAS WIKI" from the Product pulldown
6. Select your region from the Region supporting downtown (same as before) 
7. Submit your OFJ ticket

If you do not have access to Microcontrollers Customer Portal, please contact your local FAE to discuss the issue.  FAE may be able to help you and resolve it.  If not, your local FAE can file a ticket for you.   

==================== END OF COMMON MCU SECTION ======================

==================== BEGINNING OF RL78 SPECIFIC  SECTION ======================

RL78 Specific Topics

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

RL78 Topic 1

RL78 Topic 2