RL78/F13 microcontrollers are successors to the 78K0R and R8C, are available in a 20 to 80-pin, 16KB to 128KB flash memory lineup and realize the industry's lowest level of consumption current. They have a built-in CAN module and LIN module for automotive interfaces, and in addition to the functional safety features, a RAM ECC function, PLL lock function, port output state monitoring, stack overflow detection, dedicated WDT oscillator and more have also been added. Since a more highly reliable system can be built, these microcontrollers can be used for industrial applications and of course automotive applications. Design resources are available here to help you get your design to market as quickly as possible.


We have placed related primary documentation on this page such as user's guides, application notes and collateral.

User Manuals

Electrical Characteristics

Collateral Materials

High Temperature: Ta = 150°C Support

  • To order an RL78/F13 MCU with Ta = -40 °C to 150 °C specification, please provide the order code and the application temperature mission profile for verification to Renesas Support.

Application Notes










H/W Design



Motor Control

Option Byte



Porting Guide











Hardware Tools

In the Hardware Tools section, we provide links to the MCU starter kits. The starter kit is a fully self-contained hardware and software tool for evaluating microcontroller features and performance and can be used to start development. It includes the Renesas E1 on-chip debugger, access to all I/O pins and serial interfaces such as RS-232, LIN, and CAN. The starter kit is the fastest way to get the hardware and software needed to begin development right away. We provide links to the user's manual and quick start guide as well as a link to purchase.

Starter Kits

Starter Kit Description Featured Documents Ordering
  • Target board QB-R5F10BMG-TB which contains an RL78/F13 device with 80 pins and 128KB Flash memory
  • E1 OCD emulator (HW – OCD and flash programmer)
  • IAR EWRL78 KickStart Edition (SW – compiler from IAR with limited feature set)
  • Quick-Start Guide (documentation with SW examples)
pdf_icon_for_table.png User's Manual

pdf_icon_for_table.png Quick Start Guide

Programming Tools

We also offer a newer and faster emulator for separate purchase. While there is a debugger included in the starter kit, we offer the option here to purchase the newer and faster E2 emulator/debugger for programming and debugging RL78/F1x devices.

In addition to a hardware emulator/debugger, we also offer the Renesas Flash Programmer for free download. The Flash programmer contains a simple-to-use graphical user interface which is ideal for first-time developers.

Programming Tools Description Featured Documents Ordering
E2 Emulator On-chip debugging emulator for RH850 family and RL78 family. Also available as a flash memory programmer. pdf_icon_for_table.png User's Manual Contact Us
Renesas Flash Programmer
(Programming GUI)
The Renesas Flash Programmer provides usable and functional support for programming the on-chip flash memory of Renesas microcontrollers in each phase of development and mass production.
  • A simple GUI makes operations easy, even for first-time developers
  • PC-controlled programming via the E1 emulator or E2 emulator, a serial or USB connection
pdf_icon_for_table.png User's Manual Free Download

Software Tools

In the Software Tools section, we have many resources to assist with your MCU project.

For your compiler toolchain needs, we recommend IAR Systems. We provide a link to the partner site which allows you to start your design without delay.

In addition, we offer software libraries, and driver generation software called Applilet3. It's available for free download, and it provides support in generating device drivers for peripheral modules. The software and user manuals for Applilet3 are provided for your convenience.

Compiler Toolchain

Company Company Logo Description
IAR Systems
IAR Embedded Workbench provides extensive support for RL78 devices. IAR Embedded Workbench is a complete set of development tools with leading optimization technology for creating powerful automotive applications.

Software Libraries

The Flash Libraries are provided to easily rewrite the RL78 code and the data flash memory. The Flash Self-programming Library (FSL) can be used to rewrite the code flash. The Data Flash Access Library (FDL) allows simple access to the data flash. By the use of the EEPROM Emulation Library (EEL) the data flash performs in an EEPROM-like manner. The EEL also contains the FDL.

Software Library Featured Documents Download
Flash Self-programming Library Type T01, European Release pdf_icon_for_table.png User's Manual archive Software
Data Flash Access Library Type T04 (Pico), European Release pdf_icon_for_table.png User's Manual archive Software
EEPROM Emulation Library Type T02 (Tiny), European Release pdf_icon_for_table.png User's Manual archive Software
Flash Self Programming Library Type01 Japanese Release pdf_icon_for_table.png User's Manual archive Software
Data Flash Library Type04 Japanese Release pdf_icon_for_table.png User's Manual archive Software
EEPROM Emulation Library Pack02 Japanese Release pdf_icon_for_table.png User's Manual archive Software

Software Tools

Software Featured Documents Download
Applilet3 Code Generator pdf_icon_for_table.png User's Manual archive Software

Crypto Library

A library for Renesas microcontroller that perform software processing is available.

*The driver for high-speed encryption processing by the hardware accelerator installed in RL78/F2x will be provided after concluding an NDA.

Type Function Target Devices Support compiler
SHA hash function library SHA-256/384/512
Processing of initial value setting and addition of padding data in the library for easy use
RL78/Fx series CC-RL, IAR
RSA library Maximum key length 3072bits.
Signature generation/ verification method RSASSA-PKCS1-V1_5
Modulo exponentiation
RL78/Fx series CC-RL, IAR

Obtaining the product

We will provide the product to customers who will be adopting or plan to adopt a Renesas microcontroller. Please contact your local Renesas Electronics sales office or distributor.


In this section, we provide links to instructional videos, workshops, and other introductory materials.


In case you still can't find what you're looking for, we provide links to Frequently Asked Questions and Forums as well as support links to send an inquiry to a Renesas expert about our RL78/F1x products.


FAQ Icon

RL78 Family FAQs

Find answers to common questions, support articles and development hints.

Contact Support Icon

Contact Support

Contact sales or technical support.

Forum Icon


Browse material, post questions and join moderated discussions related to Renesas products.

Third-Party Support

The Renesas partner ecosystem provides additional software solutions and support. These are the experts who can help you get your design to market as fast and as reliably as possible.

Company Description  
SimuQuest Logo
SimuQuest's QuantiPhi enables driver configuration and production code generation, seamlessly integrated with Simulink. QuantiPhi detects and resolves inconsistencies in real-time and automatically optimizes chip settings.
Learn More
QuantiPhi chip configuration and driver integration tool