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
Software & Tools
| Software title
|
Software type
|
Company
|
|---|---|---|
| C Compiler Package for RL78 Family [CC-RL] C Compiler Package for RL78 Family [IDE: CS+, e² studio]
|
Compiler/Assembler | Renesas |
| E2 emulator [RTE0T00020KCE00000R] On-chip debugging emulator. Also available as a flash memory programmer. [Support MCU/MPU: RA, RE, RH850, R-Car D1, RL78, RX, RISC-V MCU]
|
Emulator | Renesas |
| E2 emulator Lite [RTE0T0002LKCE00000R] On-chip debugging emulator. Also available as a flash memory programmer. [Support MCU/MPU: RA, RE, RL78, RX, RISC-V MCU]
|
Emulator | Renesas |
| CS+ Renesas integrated development environment (IDE) [Support MCU/MPU: RH850, V850, RX, RL78, 78K0R, 78K0]
(Note: CS+ is not generally promoted to U.S. and European customers.)
(Note: To use Smart Configurator on CS+ for RL78/G23 and RX family MCUs, install the Smart Configurator for each MCU family separately downloading from ”Design & Support” > ”Development Tools” > ”Smart Configurator”)
|
IDE and Coding Tool | Renesas |
| RI78V4 V2 Real-time OS for RL78 Family μITRON Specification real-time OS for RL78 Family [Required IDE : CS+]
|
ITRON OS | Renesas |
| RI78V4 V1 Real-time OS for RL78 Family and 78K0R μITRON4.0 Specification real-time OS for RL78 Family and 78K0R [Required IDE : CS+]
|
ITRON OS | Renesas |
| CS+ Partner OS Aware Debugging Plug-in Features for task level debugging of real-time OS applications [Plugin for Renesas IDE CS+] [Support MCU/MPU: RX, RL78]
|
Plug-in, OS Aware Debugging, Etc. | Renesas |
| PG-FP6 Flash memory programmer [Programming software: Dedicated GUI-based software, the "FP6 Terminal"] [Support MCU/MPU and devices: RA, RE, RX, RL78, RH850, RISC-V MCU, Renesas Synergy, Power Management, Renesas USB Power Delivery Family, ICs for Motor Driver/Actuator Driver, SuperH RISC engine, V850, 78K, R8C]
|
Programmer (Unit/SW) | Renesas |
| Renesas Flash Programmer (Programming GUI) Flash memory programming software [Support MCU/MPU and devices: RA, RE, RX, RL78, RH850, RISC-V MCU Renesas Synergy, DA1453x, DA1459x, DA1469x, DA1470x, Power Management, Renesas USB Power Delivery Family, ICs for Motor Driver/Actuator Driver, V850, 78K0R, 78K0]
|
Programmer (Unit/SW) | Renesas |
| Code Flash Libraries (Flash Self Programming Libraries) Libraries for the reprogramming of code area flash memory, including EEPROM emulation libraries for the code areas of 78K-family products
|
Self Programming Library (Flash Library) | Renesas |
| Data Flash Libraries Libraries for the reprogramming of data flash memory, including EEPROM emulation libraries for the data areas of RL78-family products
|
Self Programming Library (Flash Library) | Renesas |
| RL78 Web Simulator Right online tools to support initial evaluation of the low power consumption RL78 Family. Lineup: MCU Simulator Online and Current Consumption Calculator. Free of charge.
|
Simulator | Renesas |
| Simulator for e² studio of RL78 Family Simulator for RL78 Family [Support IDE: e² studio] (Note: This product is included in the Renesas IDE "e² studio" and is not available separately.)
|
Simulator | Renesas |
| Simulator for CS+ of RL78 Family, 78K0R and 78K0 Simulator for RL78 Family, 78K0R and 78K0 [Support IDE: CS+] (Note: This product is included in the Compiler Package and is not available separately.)
|
Simulator | Renesas |
| RL78 Smart Configurator RL78 Smart Configurator is a utility for combining software in ways that meet your needs. It simplifies the embedding of Renesas drivers in your systems through supports for importing middleware and drivers and configuring pins.
|
Solution Toolkit | Renesas |
| QE for Current Consumption: A Dedicated Tool for Current Measurement Development assistance tool helps to shorten the times taken in operations for the tuning of currents drawn. [Standard item in the "e² studio" and CS+ (CS+ for CC only) IDEs] [Support MCU/MPU: RX, RL78]
|
Solution Toolkit | Renesas |
| Sound Playback/Compression System [M3S-S2-Tiny] for RL78 Family Sound playback system for RL78 Family
|
Sound / Voice | Renesas |
| FFT Library Fast Fourier Transform (FFT) Library
|
DSP / FFT | Renesas |
| e² studio - information for RL78 Family Eclipse-based Renesas integrated development environment (IDE).
|
IDE and Coding Tool | Renesas |
| Crypto Library Robust encode library to ensure security for all types of system developments
|
Security / Crypto | Renesas |
| SPI/QSPI Serial Flash Memory, QSPI Serial Phase Change Memory Driver Device Driver for SPI and QSPI Serial Flash Memory and QSPI Serial Phase Change Memory
|
Serial Memory | Renesas |
| IAR Embedded Workbench for Renesas RL78 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.
|
IDE and Coding Tool | IAR Systems |
| Renesas IAR Embedded Workbench Device-Support-Packages Renesas IAR Embedded Workbench Device-Support-Packages include all device-specific files to be used with the Embedded Workbench IDE.
|
IDE and Coding Tool | Renesas |
| Reality AI Utilities Round-trip workflow for AI development and performance validation allowing to collect data, optimize models, and deploy directly to Renesas hardware
|
Solution Toolkit | Renesas |
|
24 items
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Sample Code
Boards & Kits
Evaluation
RTK5RLG150C00000BJ
Active
RL78/G15 Fast Prototyping Board (RL78/G15 FPB)
The RL78/G15 Fast Prototyping Board, featuring the RL78/G15 microcontroller, is ideal for various prototype developments. The built-in emulator circuit that is equivalent to E2 emulator Lite allows programming and debugging without extra tools. Additionally, it has Arduino Uno and Pmod™...
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Test This Board Remotely
Available on Lab on the Cloud, use our PC-based GUI to instantly start configuring and testing designs in our virtual lab, no physical board needed.
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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.
Product Options
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Support
Support Communities
Get quick technical support online from Renesas Engineering Community technical staff.
Support Communities
-
RL78/G15 sleep mode
how to implement sleep mode in RL78/G15.
Jan 2, 2025 -
RL78/G15 Fast Prototyping Board
RTK5RLG150; USING WITH USB TO PC NOT WORING SHOWING Download failed. [Direct Error Cause]No response from the emulation CPU. Please confirm the signal of the CLOCK or RESET,WAIT and so on.(E1200416
Sep 5, 2024 -
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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Compatibility of RL78/G15 with existing products
RL78/G15 (10-pin, 16-pin) has pin compatibility with RL78/G10 (10-pin, 16-pin). The same functions are assigned to the same pins. RL78/G15 (20-pin) is essentially pin compatible with RL78/G12 (20-pin), except for three pins, namely, ANI, TOOLTxD, and ...
Jan 12, 2023 -
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 -
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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