Overview
Description
Flash memory reprogramming software for RL78/L23 has been released.
The data flash library is free-of-charge software that reprograms the contents of the data flash memory by user programs.
"Renesas Flash Driver for RL78" is free-of-charge software that reprograms the contents of code flash memory and data flash memory by user programs.
Features
- Data Flash Libraries provide the interface for operations on the areas of data flash memories that MCUs have. (Functions are supported varies with the MCU. Please check the available functions in the user's manual for the target flash reprogramming software.) ：
- Erasing
- Programming
- Internal verification
- Blank checking, etc.
- An EEPROM emulation library for data flash memory is also included.
- Learn More
Release Information
Renesas Flash Driver RL78 Type 11 for RL78/L23 Group
- Latest Ver.: Ver.1.00
- Released: Sep 05, 2025
EEPROM Emulation Software RL78 Type 11 for RL78/L23 Group
- Latest Ver.: Ver.1.00
- Released: Sep 05, 2025
Data Flash Library Type04 for RL78 Family
- Latest Ver.: Ver.3.00
- Released: Feb 05, 2024
Note: The LLVM compiler version was added to the package.
Package for the EEPROM Emulation Library Pack02 for the RL78 Family
- Latest Ver.: Ver.3.00
- Released: May 20, 2024
Note: The LLVM compiler version was added to the package.
Package for the EEPROM Emulation Library Pack01 for the RL78 Family, the EEPROM Emulation Library T01 for the RL78 Family
- Latest Ver.: Ver.2.10
- Released: Jan 22, 2018
Note: This package is the revised edition of the following package, and the package name was changed.
- Package for the EEPROM Emulation Library Pack01 for the RL78 Family
Renesas Flash Sample Program Type01 for RL78/G15 Group and RL78/G16 Group
- Latest Ver.: Ver.1.21
- Released: Jan 20, 2026
Renesas Flash Driver RL78 Type 01 for RL78/G2x Group
- Latest Ver.: Ver.1.21
- Released: Dec 05, 2025
EEPROM Emulation Software RL78 Type 01 for RL78/G2x Group
- Latest Ver.: Ver.1.21
- Released: Dec 05, 2025
Renesas Flash Driver RL78 Type 02 for RL78/F23 and RL78/F24
- Latest Ver.: Ver.1.01
- Released: Dec 05, 2025
EEPROM Emulation Software RL78 Type02 for RL78/F23 and RL78/F24 Group
- Latest Ver.: Ver.1.01
- Released: Dec 05, 2025
Renesas Flash Driver RL78 Type 03 for RL78/F22 and RL78/F25
- Latest Ver.: Ver.1.00
- Released: Aug 05, 2024
EEPROM Emulation Software RL78 Type03 for RL78/F22 and RL78/F25 Group
- Latest Ver.: Ver.1.00
- Released: Sep 05, 2024
Details of upgrade (See Tool News)
Target Devices
Design & Development
Videos & Training
This video introduces how to reprogram the RL78/G2x data flash memory using the Renesas Flash Driver RL78 Type 01 Smart Configurator Version on e² studio.
Additional Details
Distribution Method
| Target Device Family | Distribution Method | Software name described in the download list |
|---|---|---|
| RL78/x1x | Download | Flash Self Programming Library Note1, 2 Renesas Flash Sample Program Type01 Note3 |
| RL78/x2x | Design & Development | Renesas Flash Driver RL78 Type01 Renesas Flash Driver RL78 Type02 Renesas Flash Driver RL78 Type11 Renesas Flash Driver RL78 Type03 Note4 |
| 78K (78K0R) | Contact your local Renesas Electronics marketing office or distributor when wishing to use. | - |
| RX | Application notes and sample codes for RX family related to flash programming are available. Please visit the Application Notes & Sample Code of the Documentation tab on the RX family product page. | - |
Notes:
- In the User's Manual (Hardware) for some RL78 MCUs or the User's Manual for some Flash Libraries for the RL78 family, the self RAM areas used in common for all flash libraries may be shown. However, for the latest information, please refer to the "RL78 Family Self RAM list of Flash Self Programming Library Rev.3.05 (PDF | English, 日本語)".
- Because the self RAM areas are used as the work area for the library, using these areas for the user program is prohibited. For the latest information, please refer to the "RL78 Family Self RAM list of Flash Self Programming Library Rev.3.05 (PDF | English, 日本語)".
- Renesas Flash Sample Program Type01 for RL78/G15 group and RL78/G16 group can be downloaded from [Design & Development].
- Refer to Renesas Flash Driver and EEPROM Emulation Software Target MCU List for RL78 (PDF | English, 日本語) for Renesas Flash Driver and EEPROM Emulation Software target MCUs.
Target Devices
- RL78 Family
- 78K Family (78K0R)
Support
Support Communities
- how to download the older version of data flash library v2.00
in the older version IAR files are available but in the current version 3.00 only 3 files are available other than iar.
Nov 11, 2024 - Data Flash Library for RH850F1L
Could anyone please tell me from where I could get data flash library FDL code for RH850F1L controller ? I checked on renesas site but I couldn't get. Is there any procedure to convert Code Flash Library (FCL) code to Data Flash Library(FDL) ?
Jul 25, 2017 - Data Flash Library T01 - FAL_Init() fails
... Flash Library T01 on my application. I have successfully tested it on my Renesas test board which has the R5F10BMG MCU (80 pins, 128kB code flash, 4 kB data flash). But when I test it on the actual target R5F10BGG (48 pins, 128kB code flash, 4 kB data flash) mounted ...
Jul 24, 2019
Knowledge Base
- Error Message E0562351 "Section ".bss" cannot be placed on the "SELFRAM area" appears when Data Flash Library is set to "Used" with the Code Generator for RL78 in e² studio
The following error message is displayed if you run a build with Data Flash Library set to "Used" when using the Code Generator for RL78. E0562351:Section ".bss" cannot be placed on the "SELFRAM area". In this case, set None for [RAM area without section] after selecting [Settings], [Tool Settings ...
Jul 26, 2019 - Is writing/erasing data in RL78 item memory possible without command?
When reprogramming a data flash memory by self-programming, the Data Flash Library Type 04 for RL78 Family is required.When reprogramming a data flash memory by methods other than self-programming, a flash programming tool can be used. For information on the flash programming tools from Renesas, refer to ...
Jun 17, 2025 - Rewriting and erasing data flash memory_RL78
For rewriting and erasing data flash memory of the RL78 family, refer to the user’s manual for Data Flash Library Type04.Use the library functions for Data Flash Library Type04 so that you can read and write the data flash memory.
Sep 20, 2017
Support Communities
