Renesas RL78

RL78 - True Low Power Microcontroller Platform

The RL78 Family of microcontrollers (MCUs) combines advanced low power technology, outstanding performance, and the broadest line-up in its class for the most demanding 8- and 16-bit embedded applications.

The RL78 MCUs‘ innovative “Snooze“ mode achieves ultra-low power by allowing ADC operation and serial communication, all while the CPU is turned off. This makes the RL78 MCUs best in class for low power applications.

Features (Advantages) of the Family


General Purpose

Products Key Features Maximum Frequency, Pins, Voltage
RL78/G14 3-phase PWM, 2-phase encoder, DTC, ELC, DAC, comparator, data flash 32 MHz, 30-100 pins, 1.6-5.5 V
RL78/G13 Timers, SIO, 8/10-bit ADC, DMAC , POC/LVI, data flash 32 MHz, 20-128 pins, 1.6-5.5 V
RL78/G12 Timers, SIO, 8/10-bit ADC, DMAC , POC/LVI, data flash 24 MHz, 20-32 pins, 1.8-5.5 V

Renesas Promotion Board for RL78/G13


The YRPBRL78G13 is a promotion board for the new Renesas RL78 microcontroller family. It supports on-board debugging, flash programming, and is pre-programmed to work with the GUI provided on the included DVD to demonstrate the low-power capabilities of the Renesas RL78 MCU.

Product Features

  • Easy to use device demonstration capabilities
    The YRPBRL78G13 contains elements to easily demonstrate simple I/O-functions (i.e. LED output, I/O lines, UART serial interface) together with the key functions such as Real Time Clock (RTC), ADC, Timers, safety functions and on-chip data flash.
  • Power supply via USB interface
    The YRPBRL78G13 is powered via USB interface. No separate power supply is needed, although a connector is provided to supply an external power supply if required.
  • On-Board debug function
    The YRPBRL78G13 supports an On-Board debug function by using the IAR CSPY debugger, without the need of additional debug hardware. It allows Flash programming and supports standard debug functions such as code execution, single stepping, software breakpoints, memory manipulation etc.
  • WriteEZ5 Flash programming software (preliminary version)
    Windows based Flash programming software allows the user to select and download application programs to the YRPBRL78G13 board for evaluation purposes.
  • Applilet3 Device driver code generator
    Software tool used to generate device driver code to initialize and use on-chip peripherals (preliminary version)
  • Various input / output signals available, such as
    • All I/O ports prepared to be connected to user hardware
    • Virtual UART interface, via the μPD78F0730 78K0 8-bit microcontroller with on-board USB interface
    • 1 LED connected to a RL78/G13 port for visualization.

Extensive Renesas Development Ecosystem

Renesas Electronics and selected partners offer a comprehensive suite of hardware and software tools for the rapid evaluation and development of embedded systems built with RL78.

Hardware Development Tools

RL78/G13 Renesas Promotion Board (RPB)

  • Demo the high performance of RL78
  • Evaluate and measure the low power modes
  • PC software included (GUI, drivers)
  • IAR KickStart (16KB code limited)
  • Applilet device code generator

RL78/G13 Renesas Starter Kit (RSK)

  • CPU board with target microcontroller
  • LCD panel for user diagnostic interaction
  • E1 on-chip debugger
  • Trial C compiler
  • Applilet device code generator
  • Sample code for peripherals

RL78/G13 Renesas Demo Kit (RDK)

  • RL78 MCU board with integrated debugger (USB-powered)
  • Sample project exercising peripherals using sensors, display and audio speaker
  • IAR Embedded Workbench for RL78 (16KB KickStart edition) including C/C++ compiler and powerful debugger

Buy Now - YRDKRL78G13

Software Development Tools

Micrium RTOS
  • Numerous helpful features for writing multi-task applications
  • Highly efficient
  • Popular choice for safety-critical designs
CMX Systems
  • Small footprint
  • Fast context switching time
  • Truly pre-emptive scheduler
  • Nested interrupts
  • User configurable
  • Free of charge RTOS for download to deploy RL78 designs
  • Fully supported commercial versions available as OpenRTOS, code compatible
Segger embOS
Segger embOS
  • Priority controlled RTOS based on zero interrupt latency, high-performance architecture
  • Optimized for minimum memory consumption in both RAM and ROM

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