Overview
Description
The RL78/G15 is a general-purpose microcontroller with a 16MHz operating frequency. There is a wide lineup available, including the smallest 8-pin package in the RL78 Family, and support for a wide range of operating ambient temperatures from -40°C to 125°C. The built-in high-speed on-chip oscillator with high accuracy (±1.0%), the data flash, the rich serial interfaces, and the comparator make it ideal for compact applications where space comes at a premium. A full development environment for the RL78/G15 is provided, including an evaluation board (Fast Prototyping Board) enabling writing and debugging programs by simply connecting a USB cable, a Smart Configurator that facilitates software design with GUI, and an Arduino library. Moreover, it is compatible with the existing RL78 Family and can be used in a wide range of applications, from home appliances and consumer electronics to industrial equipment.
Features
- CPU: RL78 core, Max. 16MHz
- Voltage: 2.4V to 5.5V
- Package: 8-pin to 20-pin
- Memory: Program Flash: 4-8KB, SRAM 1KB, Data Flash 1KB
- Operating temperature range: up to 125°C
- Timer: 16-bit Timer x 8ch, Watchdog Timer x 1ch, 12-bit Interval Timer x 1ch
- Analog function: 10-bit A/D Converter x 11ch, Comparator
- On-chip Oscillator Freq. (MHz): High-Speed: 1, 2, 4, 8, 16MHz; Low-Speed: 15kHz
- Connectivity: SCI (CSI, UART, Simple I2C), I2C
- Others: Selectable Power-On Reset, Low Voltage Detection, On-chip Debug 2.4V to 5.5V (Single-wire, double-wire)
Comparison
Applications
Design & Development
Software & Tools
Sample Code
Boards & Kits
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
Support
Support Communities
Support Communities
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STOP MODE in RL78/G15
I was using rl78/G15 controller for project I want to work on power modes like stop mode controller entering into the stop mode but not wake ups for stop mode could you please suggest any way to wake up the device I am using INTP3 for external interrupt.
Feb 16, 2025 -
RL78/G15 e2stdio how to config UART baud to 57600?
I config UART baud in e2stdio, but i can't select baud 57600, I need to use UART baud 57600, Can you help to advise?
Feb 18, 2025 -
RL78/G15 -- Read the status of pins
Hello team,I am trying to read the status of few pins on RL78/G15 . Can you pls confirm if this is the right approach?x = P2_bit.no1y = P2_bit.no2Or do I need to use any other approach?(port 2 and pins 1 & 2)
Dec 27, 2024
FAQs
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How to enable real time refresh of variables during debugging with RL78/G15
Last Updated: 03/28/2025 Question: How to enable real time refresh of variables during debugging with RL78/G15 Answer: To enable real time refresh of variables, it is required to enable the Pseudo-RRM/DMM function setting and to allocate 4 bytes of memory in ...
Mar 28, 2025 -
Background operation support of RL78/G15
The data flash memory of RL78/G15 does not support background operation (BGO). Please use RL78/G12 if background operation (BGO) is required.
Jan 12, 2023 -
Operating frequency of RL78/G15
The maximum operating frequency of RL78/G15 is 16 MHz. Please use RL78/G12 for operating at 24 MHz.
Jan 12, 2023
Videos & Training
This video introduces how to add the RL78 board platform released by Renesas Electronics
on GitHub to Arduino IDE version 1 and run sketches.
Related resources: Quick Start Guide page (GitHub)
00:00 Opening
00:30 Install the Arduino IDE
00:47 Install the tools
01:54 Write the sketch
02:02 COM port setting
02:29 Board setting
02:44 Compile, upload, LED blinking
News & Blog Posts
Blog Post
Apr 1, 2025
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Blog Post
Oct 30, 2023
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Blog Post
Jan 12, 2023
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