"Applilet EZ PL for RL78" is software that allows users with no programming language knowledge to easily create a microcontroller application program, in a manner similar to that of solving a jigsaw puzzle. Even users who are unfamiliar with programming languages and have no software development experience can create a microcontroller application program easily using the graphical user interface (GUI) of this software on a computer. It is also suitable for studying and evaluating basic microcontroller operation.


  • Logic circuits, timers, general-purpose logic, microcontroller functions, and so on are displayed in a GUI panel. You can combine panels in the GUI like a jigsaw puzzle to easily create a program for a RL78 microcontroller.
  • Program operation can be evaluated by waveform simulation.
  • Supports Renesas compilers
    Version 1.x: Supports CA78K0R (same as that which comes with the CS+ integrated development environment) as standard. Supports IAR/GNU compilers (IAR/GNU compiler requires separate installation.)
    Version 2.x: Supports CC-RL compiler (JRE 1.8.0 or later needs to be installed)
  • Programming to a microcontroller using an Renesas Flash Programmer (Programming GUI) is supported. Applilet EZ PL for RL78 can support all phases, from program development to evaluation on the actual device.
  • The generated C source code can be imported into an integrated development environment (CS+, etc.) to edit and recompile. Since software development is carried out while referring to a program, this helps shorten development time.
  • Learn More

Target Devices


Type Title Date
Software & Tools - Other Log in to Download ZIP 47.82 MB 日本語
Software & Tools - Other Log in to Download ZIP 8.43 MB 日本語
2 items

Additional Details

Evaluation Boards

CPU board

Has connector for connecting to E1, and all pins can be monitored Ideal for confirming microcontroller functions

For details, please see the following.


Pitch conversion board (Hokuto Denshi)

Converts SOP package pins to 2.54 mm pitch; can be used for circuit investigation on a breadboard.

For details, please see Hokuto Denshi's page.

Evaluation Boards

Example of Connecting Pitch Conversion Board to On-Chip Debugging Emulator


Download Software (Applilet EZ PL for RL78)

This is the download page for the Applilet EZ PL for RL78, a simple visual programming software. It is assumed that customers who view or download any of the tools or materials shown on this and subsequent pages have agreed to the terms of the License Agreement.

Be sure to read the License Agreement before viewing or downloading these tools.

License Agreement

  • In no event shall Renesas Electronics be held responsible for any infringement of copyrights, patents, trademarks or other intellectual property rights of third parties arising out of or in connection with the use of this product. Nothing herein shall be construed as conferring any right or license under any copyrights, patents, trademarks or other intellectual property rights of Renesas Electronics or any third party.
  • Circuits, software, and other information related to these tools and/or materials are provided for illustrative purposes in semiconductor product operation and application examples. The incorporation of these circuits, software and information in the design of the customer's equipment shall be done under the full responsibility of the customer. Renesas Electronics assumes no responsibility for any losses incurred by customers or third parties arising from the use of these circuits, software and information.
  • No part of this document may be copied or reproduced in any form or by any means without the prior written consent of Renesas Electronics. Renesas Electronics assumes no responsibility for any errors that may appear in this document.
  • These tools are evaluation versions. No technical support will be provided for these tools. For details on an evaluation board, please contact the company that sells the board directly.

* You must agree to these terms before using any of the tools shown below.

Product nameTarget DevicesUser's manualApplication NotesDownload
Applilet EZ PL for RL78 V1.01ERL78/G10Included with the productIn preparationApplilet EZ PL for RL78 V1.01E (ZIP | English, 日本語)
Applilet EZ PL for RL78 V2.20ERL78/G10
Included with the productIn preparationApplilet EZ PL for RL78 V2.20E (ZIP | English, 日本語)