Overview
Description
The RL78/G16 capacitive touch evaluation system makes it easy for users to evaluate touch solutions offered by Renesas. You can start evaluating immediately out of the box using the board and software included in each kit.
Configuration
- RL78/G16 CPU board
- Touch application board
- Self-capacitance evaluation board built-in basics for capacitive touch: switches, sliders, and wheels
Features
- Use to evaluate various touch functions (button, slider, wheel)
- Simple prototyping
- Use as a reference when designing boards or software
- Easily adjust the sensitivity by using QE for Capacitive Touch
- Easy operation with an intuitive interface
- Easy to develop touch interfaces even for beginners with the GUI
- Automatically output adjusted source code
- RL78/G16 MCU (R5F121BCAFP) mounted
- Capacitive touch sensor (CTSUb) terminal, 15 channels available
Applications
Documentation
Featured Documentation
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| Type | Title | Date |
| Manual - Development Tools | PDF 904 KB 日本語 | |
| PCB Design Files | ZIP 2.32 MB | |
| Application Note |
PDF
722 KB
日本語
AI-generated Summary:
The RL78/G16 Capacitive Touch Evaluation System sample code enables capacitive touch functionality for three buttons, a slider, and a wheel on the evaluation board. It supports LED control linked either to capacitive touch inputs or CPU board push buttons, selectable via hardware switch and build options. The system uses USB serial communication for monitoring and tuning due to lack of emulator support. The software integrates components generated by the Smart Configurator and includes configuration files, tuning logs, and LED control applications. The code operates at 16MHz with a 5.0V supply and is confirmed on the RL78/G16 evaluation hardware using Renesas e2 studio and QE for Capacitive Touch tools.
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| Application Note |
PDF
6.87 MB
日本語
Functional safety functions are becoming an important on system design as automatic electronic control systems continue to expand to a wide range of applications. This APN describes the software for capacitive touch sensor(CTSU) functional safety self test.
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| Tool News - Release | PDF 176 KB 日本語 | |
| Application Note |
PDF
3.46 MB
日本語
, 简体中文
This application note describes parameter tuning methods using QE for Capacitive Touch for microcontrollers that incorporate a Capacitive Touch Sensing Unit (CTSU).
In addition to the default auto-tuning process, it provides an overview of the Advanced mode and adjustable CTSU parameters for optimizing touch performance.
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| Application Note |
PDF
1.58 MB
日本語
AI-generated Summary:
The CTSU module integrates capacitive touch sensing functions for RL78 microcontrollers, supporting multiple peripheral types with distinct features. It enables various measurement modes such as self-capacitance, mutual capacitance, and current measurement, with advanced functions including sensor correction, initial offset adjustment, multi-frequency measurements, shield functionality, and automatic judgment. Measurements can be triggered by software or external events, with results obtained via APIs. The module also supports diagnosis, moving average filtering, and temperature correction. Multi-clock measurements reduce noise, and calibration functions ensure accurate sensor readings. The document details API usage, hardware/software requirements, and operational modes, providing comprehensive guidance for integrating capacitive touch sensing in embedded systems.
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| Application Note |
PDF
956 KB
日本語
AI-generated Summary:
The TOUCH Module integrates capacitive touch detection using the CTSU hardware, supporting buttons, sliders, and wheels with configurable settings via QE for Capacitive Touch. It processes periodic capacitance measurements to determine touch states, employing baseline calibration, drift correction, hysteresis, and debouncing to ensure accurate touch detection and reduce noise. The module supports both self-capacitance and mutual-capacitance buttons, with majority judgment modes for reliable input. It provides APIs for initialization, scanning, data retrieval, sensitivity adjustment, and drift control, enabling flexible integration into RL78 microcontroller applications.
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| Application Note |
PDF
14.40 MB
日本語
, 简体中文
This application note provides the design principles and layout examples of touch electrodes for microcontrollers embedded with a Capacitive Touch Sensing Unit (CTSU). It outlines recommended design practices and considerations for both self‑capacitance and mutual‑capacitance methods, covering electrode geometry, routing, and shielding structures. In addition, it describes the application examples for each sensing method.
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| Application Note |
PDF
2.42 MB
日本語
, 简体中文
AI-generated Summary:
Capacitive touch sensor microcontrollers utilize Renesas' Capacitive Touch Sensing Unit (CTSU) technology embedded in RX, RA, RL78 families, and Renesas Synergy™. The document explains capacitance detection principles, including self-capacitance and mutual-capacitance methods, and details the evolution from first-generation sensors to advanced CTSU2. It covers MCU lineups, hardware design guidelines, software configuration, tuning procedures, development environments, and evaluation kits to support capacitive touch product development. The CTSU converts capacitance changes into measurable signals, applying filtering and threshold judgment to detect touch inputs accurately.
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| Application Note |
PDF
842 KB
日本語
The Renesas board support package SIS module (r_bsp) forms the foundation of any project that uses Software Integration System (SIS) modules. The r_bsp is easily configurable and provides all the code needed to get the MCU and the board from reset to the main() function. This document describes r_bsp conventions and explains how to use it, configure it, and create a BSP for your own board.
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| Application Note | PDF 4.99 MB 日本語 | |
| Application Note |
PDF
8.65 MB
日本語
The Capacitive Touch Evaluation System for the RL78/G23 supports development with CS+, the standalone version of the Smart Configurator, and the standalone version of QE for Capacitive Touch. The standalone QE for Capacitive Touch enables flexible development independent of the device or integrated development environment (IDE). This application note describes the steps for developing capacitive touch applications using the Capacitive Touch Evaluation System.
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| Application Note |
PDF
1.50 MB
日本語
AI-generated Summary:
Capacitive touch sensors measure capacitance changes caused by finger contact using a sensor drive pulse and current measurement. Ripple noise from the power supply or peripheral circuits distorts these measurements by adding noise currents, causing inaccurate touch detection. To ensure high accuracy and reliability, power supply design must minimize ripple noise. The document explains measurement principles, ripple noise effects, and countermeasures including power supply circuit selection, switching circuits, board layout, and touch parameter tuning. It covers RX, RL78, and RA family MCUs embedding CTSU1 and CTSU2 types of capacitive touch sensing units.
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| Application Note | PDF 959 KB 日本語 | |
| Application Note |
PDF
1.68 MB
日本語
AI-generated Summary:
The guide explains how to achieve low power consumption in capacitive touch measurements using the RL78/G16 microcontroller. It combines intermittent CPU operation via a 12-bit interval timer with suspension of the Capacitive Touch Sensing Unit (CTSUb) to reduce power usage to about 1/65 compared to continuous measurement. The system measures touch inputs at regular intervals during standby, waking the main system upon touch detection. Detailed operation flows, hardware configurations, software settings, and current consumption measurement results are provided to support efficient low-power touch sensing implementations.
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| Application Note |
PDF
14.17 MB
日本語
AI-generated Summary:
The guide explains methods to enhance noise immunity for capacitive touch sensor MCUs by addressing environmental noise issues that affect capacitance measurements. It covers noise types such as radiated RF, conducted noise, electrostatic discharge (ESD), and electrical fast transients (EFT), referencing IEC 61000-4 standards. The document details hardware and software countermeasures, including board design, multi-frequency measurement, filtering techniques, and protection circuits. It targets RX, RA, RL78 MCU families and Renesas Synergy devices embedding the CTSU module, providing practical design guidelines and evaluation results to ensure stable capacitive touch operation under noisy conditions.
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| Application Note |
PDF
2.18 MB
日本語
AI-generated Summary:
The software filters for capacitive touch systems include FIR, IIR, single-pole IIR, and median filters, each with detailed specifications, usage examples, and API descriptions. The document covers embedding these filters into existing projects for RA2L1, RX130, and RL78/G16 microcontroller groups, detailing operation conditions, software configuration, and filter parameter adjustments. It also provides development environment and hardware setup information to support capacitive touch evaluation systems.
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18 items
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Design & Development
Software & Tools
Software & Tools
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Software type
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Company
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| C Compiler Package for RL78 Family [CC-RL] C Compiler Package for RL78 Family [IDE: CS+, e² studio]
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Compiler/Assembler | 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]
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Emulator | 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]
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Emulator | Renesas |
| e² studio - information for RL78 Family Eclipse-based Renesas integrated development environment (IDE).
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IDE and Coding Tool | Renesas |
| QE for Capacitive Touch: Development Assistance Tool for Capacitive Touch Sensors In developing embedded system using the capacitive touch sensor of MCUs, you can easily setup initial configurations of the touch interface as well as process the tuning of sensors, and reduce development time. [Plugin for Renesas IDE "e2 studio"] [Standalone Version] [Support MCU/MPU:RA, RL78, RX, Renesas Synergy™]
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Solution Toolkit | Renesas |
5 items
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Sample Code
Sample Code
Filters
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| Type | Title | Date Date |
| Sample Code | RL78 Family CTSU Module Software Integration System Rev.2.30 - Sample Code
Application:
Human Machine Interface (HMI)
Compiler:
CC-RL, ICCRL78
Function:
HMI, RL78 Software Integration System, Software Package
IDE:
e2 studio, IAR EWRL78
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| Sample Code | RL78 Family TOUCH Module Software Integration System Rev.2.30 - Sample Code
Application:
Human Machine Interface (HMI)
Compiler:
CC-RL, ICCRL78
Function:
HMI, RL78 Software Integration System, Software Package
IDE:
e2 studio, IAR EWRL78
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| Sample Code | RL78 Family Using the standalone version of QE to Develop Capacitive Touch Applications Rev.2.00
[Toolchains=CC-RL|V1.15.01]
ZIP
27.34 MB
日本語
Application:
Human Machine Interface (HMI)
Compiler:
CC-RL
Function:
Application Example, HMI
IDE:
CS+ for CC
This is an example of a touch application developed using CS+ and the standalone version of QE for Capacitive Touch. Two types of projects are provided: a simple implementation example and an applied example, both of which can be immediately tested on the capacitive touch evaluation system. These can be used as reference materials to understand the development procedure in conjunction with the application note.
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| Sample Code | RL78/G16 Capacitive Touch Low Power Guide - Sample Code
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| Sample Code | Capacitive Sensor MCU Capacitive Touch Software Filter Sample Program
[Software=RX Driver Package|V2.20;RA Flexible Software Package|v5.3.0],[Toolchains=CC-RL|V1.13.00;CC-RX|V3.06.00;GNU Arm Embedded|13.2.1.arm-13-7]
ZIP
16.10 MB
日本語
Application:
Consumer Electronics
Compiler:
CC-RL, CC-RX, GNU ARM Embedded
Function:
Application Example, HMI
IDE:
e2 studio
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| Sample Code | RL78/G16 Capacitive Touch Evaluation System Sample Code Rev.1.00
[Toolchains=CC-RL|V1.12]
ZIP
5.62 MB
日本語
Application:
Consumer Electronics
Compiler:
CC-RL
Function:
Evaluation Kit, HMI
IDE:
e2 studio
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6 items
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Product Options
| Part Number | Status | Stock | Budgetary Price (USD) | Description | Sampleable |
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| RTK0EG0047S01001BJ | Active | In Stock | 1u | $152.94 | Capacitive Touch Evaluation System for RL78/G16 | N/A |
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 Capacitive Sensing Unit (CTSU2).
- Capacitive Touch Sensor Solutions
- QE for Capacitive Touch: Development Assistance Tool for Capacitive Touch Sensors
- Getting Started with QE for Capacitive Touch for RL78 (this video)
- QE for Capacitive Touch Tutorial: Settings for RL78
- QE for Capacitive Touch Tutorial: Tuning for RL78
- QE for Capacitive Touch Tutorial: Serial Monitoring for RL78
Additional Videos
News & Blog Posts
Blog Post Jun 28, 2023 |
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