About the Web Simulator

This web simulator offers two tools to support initial evaluation of RL78 Family & RA Family.

MCU Simulator Online

Evaluate in the cloud without an evaluation board or development tools.

Current Consumption Calculator

Calculate the current consumption value simply by setting the conditions of the peripheral functions — no programming required.

Testimonials

Current Consumption Calculator

You can immediately calculate power supply current that includes MCU peripheral functions simply by setting the peripheral functions of a low power RL78 product in this tool. You can investigate whether current is successfully suppressed to the target value, and whether it can be further reduced by changing the conditions.

Inquiries

1. Select the product that you want to evaluate

Select a product from the list of supported products.

RL78/L23: 32MHz Ultra-Low Power LCD Microcontroller with Capacitive Touch Function

RL78/L23 44-100pin/ROM:64-512KB

RL78/G23: New Generation RL78 General-Purpose Microcontrollers with Further Refined Low-Power Performance and Expanded Peripheral Functions

RL78/G23 30-64pin/ROM:96-128KB
RL78/G23 30-64pin/ROM:192-256KB, 80pin/ROM:128-256KB
RL78/G23 44-80pin/ROM:384-768KB, 100-128pin

RL78/G24：New Generation RL78 General-Purpose Microcontrollers with Highest RL78 Processing Performance and Enhanced Analog and Timers

RL78/G24 20-64pin/64-128KB

RL78/G10: General-purpose microcontrollers with low pin count, compact size, and low power consumption

RL78/G10 10-pin/ROM:1-2KB
RL78/G10 10-pin/ROM:4KB, and 16-pin/ROM:1-4KB

RL78/G11: Low pin and internal configurable analog MCU

RL78/G11 10-25pin/ROM:16KB

RL78/G12: Compact, low power, high function general-purpose microcontrollers ideal for sub-microcontrollers

RL78/G12 20-24pin/ROM:2-16KB
RL78/G12 30-pin/ROM:4-16KB

RL78/G13: Rich lineup of standard general-purpose microcontrollers

RL78/G13 20-64pin/ROM:16-64KB
RL78/G13 30-100pin/ROM:96-256KB
RL78/G13 44-100pin/ROM:384-512KB, and 128-pin

RL78/G13A: Low Power, Lower Operating Current Microcontrollers for General Purpose Applications

RL78/G13A 44-100pin/ROM:384-512KBHelp

RL78/G14: Highly functional general-purpose microcontrollers suitable for motor control

RL78/G14 30-64pin/ROM:16-64KB
RL78/G14 30-100pin/ROM:96-256KB
RL78/G14 48-100pin/ROM:384-512KB

RL78/G1D: Bluetooth^® low energy microcontrollers for smart connectivity with current consumption among the lowest in the industry

RL78/G1D 42-48pin/ROM:128-256KB

RL78/L12: Low power, compact LCD microcontrollers

RL78/L12 32-64pin/ROM:8-32KB

RL78/L13: Low power, standard LCD microcontrollers

RL78/L13 64-80pin/ROM:16-128KB

Recommended Environment

It is recommended that this service be used under the following environment. Part or all of the service may not work correctly if not used under an environment that is shown below. Depending on your browser settings, part or all of the service may also not work correctly.

• 【Supported OS】
  【Windows 11】
  【Windows 10】
• 【Supported browsers】
  【Microsoft Edge (latest version)】
  【Google Chrome (latest version)】
  【Firefox (latest version)】

Current Consumption Calculator

Q: Can decimal values be used for the time and period settings of peripheral functions?

A: No, decimal values are not supported. Please use integer values.

Q: The current consumption calculator is not displaying correctly.

A: If you are using Internet Explorer 11, please disable Enterprise Mode. The current consumption calculator does not work in Enterprise Mode. If you are not in Enterprise Mode and the tool still doesn't work, please use Firefox or Google Chrome instead.

Q: Are the current values that are displayed guaranteed values?

A: No, the current values that are displayed are reference values only, and they are not guaranteed. They are reference current values for standard samples at 25°C.

Q: Can current values be calculated at temperatures other than 25°C?

A: No. Current values can only be calculated at 25°C.

Q: Can the combinations that can be set in the current consumption calculator be selected by microcontroller?

A: Some combinations cannot be selected. Please refer to the user's manual for details.

Q: What length of period can be measured?

A: If milliseconds is selected in the time settings, a period from 0 to 60 seconds can be measured. If microseconds is selected in the time settings, a period from 0 to 60 milliseconds can be selected.

Q: Where is the battery-life calculation result displayed?

A: Hover the mouse cursor over graph to show the battery life.

Q: How do I use snapshots?

A: Up to four sets of set conditions can be saved as snapshots, and be used to compare graphs.
Save - Display calculated results and select a data number (1 to 4) to save. Set conditions and the graph will be saved.
Restore - Select a data number (1 to 4) to restore the set conditions and graph.
Compare - Compare the currently displayed graph with a saved graph.

Q: Can graph data be saved?

A: Select save to save graph data as a CSV file.

Q: The names of peripheral functions are displayed in blue and black? What do the colors mean?

A: Functions that are in use are displayed in blue. Functions that are not in use are displayed in black.

Q: What about current values for other RL78 Groups?

A: We plan to expand the lineup of supported products going forward.

Q: How do I check peak current?

A: The display of peak current depends on the timescale. To check the peak current, set the timescale to 1/1. You can select milliseconds or microseconds as the unit of time.

Q: RL78 has multiple operating modes. Which mode is selected?

A: The operating mode settings are as follows.
  8 < f ≤ 20 MHz: HS mode
  1 ≤ f ≤ 8 MHz: LS Mode
    * LP mode is selected for MCUs supporting LP mode at 1 MHz.

March 2026

March 31, 2026

MCU Simulator Online updates
・Renewal the app design
・Integrated the sample project selection feature
・Expanded pin functions (support for loopback input and output check features)
・Added virtual components
  ・8x8 RGB LED Matrix (SPI)
  ・NeoPixel
  ・Infrared Remote Control Receiver
・Supported for new sample projects
  ・RL78/G16 MIDI Linked Illumination Control Sample Software Using SIS
  ・RL78/G23 Remote-Control Signal Transmission Using ELCL Function (NEC format)
  ・RL78/G23 WS2812B LED Control Using ELCL
  ・RL78/G24 Over-Current Protection Using the Timer KB3 Forced Output Stop Function
  ・RL78/G24 FAA Oversampling A/D Conversion
・Updated sample projects
  ・RL78/G16 MIDI Performance Control Sample Software Using SIS

October 2025

October 31, 2025

MCU Simulator Online updates
・Supports for RL78/G23 ELCL Edge Detection Thinning Function
・Updates RL78/G23 Overcurrent protection function for converter using ELCL
・Updates RL78/G24 Sensorless vector control for permanent magnetic synchronous motor
・Updates RL78/G24 Sensorless vector control for BLDC motor FAA Library

August 2025

August 27, 2025

MCU Simulator Online updates
・Supports for RL78/L23
・Supports for RL78/G13 Serial Array Unit (SAU) (EEPROM Control Using Simplified IIC)
・Supports for RL78/G15 Temperature Control of a Heater Using PWM
・Supports for RL78/G16 MIDI Performance Control Sample Software Using SIS
・Supports for RL78/G23 Serial Array Unit (SAU) (EEPROM Control Using Simplified IIC)
・Supports for RL78/G24 Flexible Application Accelerator (FAA) Sample code
・Supports for RL78/L23 24-Hour Clock Displayed on an LCD
・Added virtual components such as MIDI Device (UART) and EEPROM (I2C)
・Improved the code generation function for RL78, and supported new components/peripherals and device

Current Consumption Calculator Updates.
- Supports for RL78/L23

April 2025

April 25, 2025

MCU Simulator Online updates
・Supports for RL78/G13 UART Communication Using Hardware Flow Control
・Supports for RL78/G23 UART Communication Using Hardware Flow Control
・Supports for RL78/G23 Overcurrent protection function for converter using ELCL
・Supports for RL78/G23 Serial Array Unit (UART)
・Supports for RL78/G23 UART Reception in STOP Mode Using the UARTA Function
・Supports for RL78/G23 ELCL Multiple Parameter Monitoring Functione
・Supports for RL78/G23 Operation State Switching
・Added virtual components such as 14-segment & 8-digit LCD for internal driver
・Improved the code generation function for RL78, and supported new peripherals

January 2025

January 31, 2025

MCU Simulator Online updates
・Supports for RL78/G11 LED Control by Using 16-Bit Timer KB0
・Supports for RL78/G22 Realtime Clock
・Supports for RL78/G22 32-Bit Interval Timer (8-bit counter mode)
・Supports for RL78/G24 A/D Converter (Advanced Mode Enabled) Operation Triggered by Hardware and Software
・Supports for RL78/G24 A/D Converter (Advanced Mode Enabled) Simultaneous Sampling
・Supports for RL78/G24 A/D Converter (Advanced Mode Disabled) Hardware Trigger No-Wait Mode
・Supports for RL78/G24 A/D Converter (Advanced Mode Disabled) Software Trigger No-Wait Mode
・Added virtual components such as Power LED
・Improved the code generation function for RL78, and supported new components/peripherals

November 2024

November 5, 2024

MCU Simulator Online updates
・Supports for RL78/G16 Measuring Distance to an Object with Ultrasonic Sensor
・Supports for RL78/G22 Serial Array Unit (UART)
・Supports for RL78/G23 Remote Control Signal Reception (AEHA Format, STOP Mode)
・Supports for RL78/G23 Remote Control Signal Reception (NEC Format, STOP Mode)
・Supports for RL78/G23 Remote Control Signal Reception (RC-6 Format)
・Supports for RL78/G23 SMS Button Long Press/Short Press Judgment
・Supports for RL78/G23 ELCL Chattering Prevention Function
・Supports for RL78/G24 Sensorless vector control for BLDC motor FAA Library
・Supports for RL78/G24 Sensorless 120-degree conducting control for BLDC motor (Voltage mode)
・Supports for RL78/G24 Hall sensor 120-degree conducting control for BLDC motor (Voltage mode)
・Added virtual components such as Remote Control and Ultrasonic sensor
・Added chattering settings to a Switch virtual component
・Added graph display tab to board screen

July 2024

July 31, 2024

MCU Simulator Online updates
・Supports for RL78/G24 Sensorless vector control for permanent magnetic synchronous motor
・Supports for RL78/G23 SMS Moving Average Calculation
・Supports for RL78/G22 Wi-Fi Communication (Soft AP mode) with DA16200/DA16600
・Supports for RL78/G13 Key Interrupt Function
・Supports for RL78/L12 Key Interrupt Function
・Added virtual components such as DA16200(UART) and Key Matrix
・Improved the code generation function for RL78, and supported new components/peripherals
・Improved the editor functions and the file tree

April 2024

April 25, 2024

MCU Simulator Online updates
・Supports for RA6T2 Vector control for permanent magnetic synchronous motor with inductive sensor
・Supports for RL78/G22 Timer Array Unit (Interval timer)
・Supports for RL78/G22 Timer Array Unit (PWM output)
・Supports for RL78/G22 A/D Converter (Software Trigger and Scan Conversion Modes)
・Supports for RL78/G23 A/D Converter (Scan mode)
・Added code generation function for RL78
・Improved simulation speed of RA6T2 simulator
・Improved the editor functions and added an editor setting

January 2024

January 31, 2024

MCU Simulator Online updates
・Supports for RL78/G22 LTE MQTT Communication
・Supports for RA6T2 Sensorless 120-degree conducting control of permanent magnetic synchronous motor
・Supports for RA6T2 Sensorless vector control for permanent magnetic synchronous motor
・Supports for RA6T2 Sensorless vector control for dual permanent magnetic synchronous motor For Renesas Flexible Motor Control Series
・Supports for RA6T2 120-degree conducting control of permanent magnetic synchronous motor using hall sensors
・Supports for RA6T2 Vector control for permanent magnetic synchronous motor with hall sensors For Renesas Flexible Motor Control Series
・Adds virtual parts (RYZ024A(UART))
・Improved user interface

November 2023

November 30, 2023

MCU Simulator Online updates
・Supports for RL78/G22 Modbus ASCII/RTU
・Supports for RL78/G14 Modbus ASCII/RTU
・Supports for RL78/G16 Modbus ASCII/RTU
・Supports for RL78/G14 HS300x Sample Software
・Supports for RL78/G14 HS400x Sample Software
・Supports for RL78/G14 FS1015 Sample Software
・Supports for RL78/G14 FS3000 Sample Software
・Supports for RL78/G14 FS2012 Sample Software
・Supports for RL78/G15 Timer Array Unit (Interval timer)
・Supports for RL78/G16 Realtime Clock 2
・Supports for RL78/G16 Timer Array Unit (PWM output)
・Supports for RL78/G16 Timer Array Unit (Interval timer)
・Supports for RL78/G24 Timer RD2 in Timer Mode (PWM Function)
・Adds virtual parts (Modbus communication equipment (UART))
・Improved user interface

October 2023

October 30, 2023

Current Consumption Calculator updates
- Extended RL78/G24 lineup
  RL78/G24 20-64pin/ROM:64-128KB,

September 2023

September 28, 2023

MCU Simulator Online Updates.
・Supports for RL78/G24
・Supports for RL78/G24 Window Comparator
・Supports for RL78/G24 Timer RG2 PWM
・Supports for RL78/G24 Timer RG2 Phase Counting Mode
・Supports for RL78/G15 Temperature Alarm Device Utilizing Comparator Function
・Supports for RA6T2 to trial version

June 2023

June 30, 2023

MCU Simulator Online Updates.
- Supports for RL78/G16
- Supports for RL78/G16 Serial Array Unit (UART communication)
- Supports for RL78/G15 HS300x data acquisition via UART communication
- Supports for RL78/G15 Timer Array Unit (PWM output)
- Supports for RL78/G23 SMS Power Supply Monitoring
- Supports for RL78/G23 Timer Array Unit (PWM output)
- Supports for RL78/G23 Timer Array Unit (Interval timer)
- Supports for RL78/G23 Realtime Clock

February 2023

February 21, 2023

MCU Simulator Online Updates.
- Supports for RL78/G22
- Supports for RL78/G22 A/D Converter (Software Trigger and Sequential Conversion Modes)
- Supports for RL78/G23 SMS Smoke Fire Detection Operation

January 2023

January 12, 2023

MCU Simulator Online Updates.
- MCU Simulator Online Updates.
- Supports for RL78/G15
- Supports for RL78/G15 A/D conversion
- Supports for RL78/G15 Serial Array Unit (UART communication)
- Supports for RL78/G23 FS2012 Flow Sensor

November 2022

November 1, 2022

MCU Simulator Online Updates.
- Supports for RL78/G23 FS1015 Sample application
- Supports for RL78/G23 FS3000 Sample application
- Supports for RA6T2 Sensorless 120-degree conducting control of permanent magnetic synchronous motor (Implementation)
- Supports for RA6T2 Vector control for permanent magnetic synchronous motor with hall sensors
- Supports for RA6T2 Sensorless vector control for dual permanent magnetic synchronous motor
- Improved user interface

September 2022

September 30, 2022

MCU Simulator Online Updates.
- Supports for RL78/G23 HS300x Sample application
- Supports for RL78/G23 HS400x Sample application
- Supports for RL78/G23 I2C Supporting Multiple Slave Address (Master)
- Supports for RL78/G23 Dynamically Controlling the Display of a 7-Segment LED Indicator by Using the SMS
- Supports for RL78/G14 Controlling an I2C-bus (Arduino API)
- Supports for RL78/G14 Analog Input/Output (Arduino API)
- Supports for RL78/G14 7-Segment LED Lighting Control (Arduino API)
- Improved user interface

June 2022

June 2, 2022

MCU Simulator Online Updates.
- Supports for RA6T2
- Supports for RL78/G10 Wi-Fi module (ESP-WROOM-02) control sample software for TCP/IP Slave Transmission/Reception
- Supports for RL78/G12 Remotely Controllable Button Pusher
- Improved virtual board display functionality

March 2022

March 2, 2022

MCU Simulator Online Updates.
- Display of breakpoint list
- Add terminal list display (fixed values can be set in terminal list)
- Switching between binary/decimal/hexadecimal display of watch/local variables

December 2021

December 1, 2021

MCurrent Consumption Calculator Updates
- Extended RL78/G23 lineup
  RL78/G23 30-64pin/ROM:192-256KB, 80pin/ROM:128-256KB
  RL78/G23 44-80pin/ROM:384-768KB, 100-128pin

October 2021

October 1, 2021

MCU Simulator Online Updates.
- Support for RL78/G1F Sensorless vector control for permanent magnetic synchronous motor
- Improved UART component function

July 2021

July 1, 2021

MCU Simulator Online Updates.
- Support for RL78/G23 Serial Interface UARTA
- Support for RL78/G23 LED On/Off Switch
- Support for RL78/G23 SMS LED Blinking Dimming Control
- Update for RL78/L12 LCD for Thermometer display sample program
- Improved user interface

Apr 2021

Apr 13, 2021

MCU Simulator Online Updates.
- Supports for RL78/G23
- Added the function to search files in the project at once.
- Virtual parts: Addition of RSK LCD panel that can be used with RL78/G13, G13A, G14
- Improved the operation of the blinking display on the RL78 / L12 LCD.

Current Consumption Calculator
- Supports for RL78/G23

Feb 2021

Feb 3, 2021

MCU Simulator Online Updates.
- Supports for easy project generation function of virtual parts
- Supports for RL78/L12 Multi-Cycle Computer for Bicycles
- RL78/G14 Onboard LED Flashing Control (Arduino API)
- Improved user interface

Oct 2020

Oct 21, 2020

MCU Simulator Online Updates.
- Support for RL78/G1F Hall 120-degree conducting control for BLDC motor sample application
- Improved user interface

Sep 2020

Sep 30, 2020

MCU Simulator Online Updates.
- Support for RL78/G1F
- Support for RL78/G1F Sensorless 120-degree conducting control for BLDC motor sample application
- Improved user interface

Apr 2020

Apr 1, 2020

MCU Simulator Online Updates.
- Support for RL78/G11 Ceramic Fan Heater with Human Sensor
- Improved user interface

Dec 2019

Dec 5, 2019

MCU Simulator Online Updates.
- Support for RL78/G14 Fast Prototyping Board.
- Support for RL78/G10 Automatic Hand Soap Dispenser sample application

Oct 2019

Oct 31, 2019

MCU Simulator Online Updates.
- Support for RL78/G13A and RL78/L12
- Support for new RL78 Quick Solution, PM2.5 Monitor with Portable Battery
- Added virtual parts such as LCD for built-in driver

Current Consumption Calculator Updates
- Support for RL78/G13A

July 2019

July 31, 2019

MCU Simulator Online updates.
- Support for new RL78 Quick Solution, Infrared Human Sensor functions.
- Added infrared receiver.
- Display related information when exporting.

June 2019

June 4, 2019

MCU Simulator Online Updates.
- Support for new RL78 Quick Solution, Wireless Charger functions.
- Added virtual parts such as current Potentiometer and wireless charging transmitter.

May 2019

May 24, 2019

MCU Simulator Online Trail Version is released.

May 09, 2019

Current Consumption Calculator Updates
- Added LP(low power main) mode settings by RL78/G11.
- Added cycle settings of COMP and PGA by RL78/G10,G11,G14,L13.

Mar 2019

Mar 28, 2019

MCU Simulator Online Updates
- Support new RL78 Quick Solution "Automatic Liquid Dispenser" function.
- Add Migration Guide for Integrated Development Environment CS+, e2 studio.
- Buy and Reference for board information.
- Add variable name edit function for Watch function in "Develop" tab.
- Support CC-RL C-Compiler Version 1.08.

Jan 2019

Jan 22, 2019

MCU Simulator Online Updates
- Supported RL78/G11.
- Battery life display function in Report tab.
- Change holizontal scale initial value for consumption current graph indicated in Report tab

Dec 2018

Dec 25, 2018

Improved calculation accuracy of Current Consumption Calculator for RL78/G1D.

Nov 2018

Nov 20, 2018

MCU Simulator Online Updates
- Added switching function for color scheme theme.
- Added indication of used ROM sizr in Report tab.
- Added sample for "Air conditioning clothes with automatic adjustment of air volume".
- Added virtual parts such as temperature sensor, DC fan motor and 7-segment LCD(Valuable indication).
- Added request form that can directly communicate the request.
- Enable direct startup from RL78 Quick Solution page.
- Added compiler version indication.

Aug 2018

Aug 31, 2018

MCU Simulator Online released

Jun 2018

Jun 29, 2018

Addition of RL78/G11 to the lineup of Current Consumption Calculator.

Apr 2018

Apr 4, 2018

Improved current value of RL78/G12 serial array unit of current consumption calculator.