Renesas Electronics Corporation
Search

QE for Capacitive Touch: Development Assistance Tool for Capacitive Touch Sensors

Solution Toolkit

QE for Capacitive Touch V4.2.0: Development Assistance Tool for Capacitive Touch SensorQE for Capacitive Touch V4.2.0 Release Note

Overview

Topics
- The QE for Capacitive Touch supports the new devices RL78/F22, RL78/F25 and RL78/L23.
- The QE for Capacitive Touch supports the new device RA0L1.
- Improvement of Sensor Drive Pulse Frequency Determined by automatic tuning (CTSU2).
- Added Emulator/Serial selection step to Workflow

The notes in the following tool news have been fixed. 
[Notes] e² studio 2025-07 not compatible with Reality AI Utilities, AI Navigator, QE for Capacitive Touch, QE for AFE and other QE products (PDF | English, 日本語) 

QE for Capacitive Touch is a tool for assisting in the development of embedded systems that include the use of capacitive touch keys.
This tool simplifies the initial settings of the touch user interface and the tuning of the sensitivity.
This product is available free of charge.

  • The GUI makes it easy for even a beginner to develop touch user interfaces.
  • Automatic tuning for touch sensor sensitivity
  • Learn More
Product NameLatest Ver.ReleasedTarget Device (Note1)Details of upgradeDownloadOperating Environment
QE for Capacitive TouchV4.2.0Aug 01, 2025RA Family
RL78 Family
RX Family
Renesas SynergyTM		See Release NoteDownloade² studio plug-in(Note2)(Note3)
Operating Environment

Notes

  1. For details on supported MCUs, refer to the section Target Devices.
  2. We recommend using the e² studio installer provided for the RA Family for customers using RA Family. For details, see the GitHub page on the Flexible Software Package (FSP).
  3. For development of Renesas Synergy™, we recommend to install e² studio by platform installer included SSP(Synergy Software Package). 
    For details

Installing This Product

Downloads

Documentation

Design & Development

Explore

RA Family Software & Tool Course
RL78 Family Software & Tool Course
RX Family Software & Tool Course

Videos & Training

QE for Capacitive Touch from Renesas enables the development of touch sensors by simply following a guide on a GUI, thus contributing to shortening the development period for touch sensor functions that take advantage of the performance of the Capacitive Sensing Unit (CTSU2).

Related Resources

Additional Details

Features

The GUI makes it easy for even a beginner to develop touch user interfaces.

Simple GUI operations allow even a beginner to create the configuration for use with a touch user interface, monitor the state of input through the touch sensors, and adjust parameters.

Furthermore, since this tool can adjust tuning parameters and reflect the results through display in real-time, it is very useful for finding the appropriate parameters in various situations, such as in the presence of much static electricity or in cases of use with wet hands.

QE for Cap Touch_Workflow image
Monitoring and parameter adjustment function

Automatic tuning for touch sensor sensitivity

This tool enables automatic tuning for the sensitivity of the capacitive touch sensors. You can complete basic tuning within a few minutes by following the instructions in the pop-up messages.

Automatic tuning for touch sensor sensitivity

 

3D gesture recognition

You can develop a gesture application that reacts "by anyone's hand" without any specialized skills just by actually performing the gesture that you want AI to remember on the capacitance sensor.

3dgesture-concept-en

Supported Driver and Middleware

DeviceDriverVersion
RA FamilyCSTU (Capacitive Touch Sensing Unit) Driver
Flexible Software Package (FSP) Component for RA Family
Component name: r_ctsu		V6.0.0
Touch Middleware
Flexible Software Package (FSP) Component for RA Family
Component name: rm_touch		V6.0.0
RX FamilyDriver for capacitive touch sensor unit
RX Family QE CTSU Module Using Firmware Integration Technology
Module name: r_ctsu_qe		V3.20
Middleware for touch sensors
RX Family QE Touch Module Using Firmware Integration Technology
Module name: rm_touch_qe		V3.20
RL78 FamilyDriver for capacitive touch sensor unit
RL78 Family QE CTSU Module Software Integration System
Module name: r_ctsu		V2.20
Middleware for touch sensors
RL78 Family QE Touch Module Software Integration System
Module name: rm_touch		V2.20
Renesas SynergyCTSU (Capacitive Touch Sensing Unit) Driver
Synergy Software Package (SSP) Component for Renesas Synergy
Component name: r_ctsuv2		V2.6.0
Capacitive Touch Framework
Synergy Software Package (SSP) Component for Renesas Synergy
Component name: sf_touch_ctsuv2		V2.6.0

See here for details on adding and setting middleware related to QE for Capacitive Touch

The confirmed debugging tools

DeviceE2 emulatorE2 emulator LiteSEGGER J-Link
RA Family✔✔✔
RX Family✔✔✔
RL78 Family✔✔ 
Renesas Synergy  ✔

 

Resources

Support

Support Communities

  1. New Release QE for Capacitive Touch

    ... Synergy device families to enable capacitive touch on those microcontrollers.    Information on the new tool can be found here: QE for Capacitive Touch: Development Assistance Tool for Capacitive Touch Sensors | Renesas Please visit the Renesas weblink above to get all the latest information on the new QE for Capacitive Touch.

    Sep 22, 2021
  2. RL78/G16 Capacitive Touch example code

    Hi,  Is there have any example code for the capacitive touch?  I have try to run the CTSU examples function but it is not working well

    Feb 14, 2024
  3. RA2E1 RA Smart Configurator CTSU HAL Layer

    ... the configuration side. 1 - For CTSU implementation, I basically add a CTSU driver from stacks. But on the configuration side, there's only an option for selecting the CTSU pins, I couldn't see any other configuration options such as touch threshold parameters, calibration parameters,etc. 2-  On the software ...

    Jun 3, 2021

Knowledge Base

  1. RA Family: The serial communication monitor that is provided by QE for Capacitive Touch, Development Assistance Tool for Capacitive Touch sensors, fails to start.

    Last Updated: 02/17/2025 Question: I am trying to perform the serial communication monitor that is provided by QE for Capacitive Touch. I wrote a capacitive touch application for the RA MCU and executed it, but the error message "Failed to connect to the serial port." is ...

    Feb 17, 2025
  2. An error occurs in e2 studio during project build. (E0520005: "qe_common.h" not found)

    ... 11 or earlier   Please use the latest version of QE for Capacitive Touch as a development support tool for capacitive touch sensors.QE for Capacitive Touch can be downloaded from the following URL.QE for Capacitive Touch: Development Assistance Tool for Capacitive Touch Sensors  Suitable Products e² studioQE for Capacitive ...

    Apr 11, 2024
  3. RL78 Family: Touch development with the RL78 microcontroller

    ... When using CS+, please also install Smart Configurator:https://www.renesas.com/software-tool/rl78-smart-configurator Click here to install QE for Capacitive Touch:https://www.renesas.com/software-tool/qe-capacitive-touch-development-assistance-tool-capacitive-touch-sensors#download

    Aug 27, 2025
Support Communities

Support Communities

Get quick technical support online from Renesas Engineering Community technical staff.
Get Support
Browse Articles

Knowledge Base

Browse our knowledge base for helpful articles, FAQs, and other useful resources.
Browse Articles
Submit a Ticket

Submit a Ticket

Need to ask a technical question or share confidential information?
Submit Ticket