Overview
Description
The RA6M2 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.
Features
- Evaluating various touch functions (button, slider, wheel, matrix key, proximity sensor)
- Simple prototyping
- Use as a reference when designing boards or software
- Sensitivity can be easily adjusted using QE for Capacitive Touch Sensors
- Graphical User Interface (GUI) makes it easy for starters to develop capacitive touch interfaces
- Simple prototyping
- Use as a reference when designing boards or software
Applications
Documentation
Featured Documentation
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| Type | Title | Date |
| Quick Start Guide | PDF 1.21 MB 日本語 | |
| Manual - Hardware | PDF 858 KB 日本語 | |
| PCB Design Files | RTK0EG0021S01001BJ - Design Package
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| Application Note |
PDF
657 KB
日本語
AI-generated Summary:
The RA6M2 Capacitive Touch Evaluation System sample code enables capacitive touch functionality for multiple electrodes including buttons, slider, wheel, and shield. It integrates LED control responding to touch inputs and CPU board push buttons. The system supports USB serial communication for serial monitoring and tuning via QE tools. The software structure relies on FSP-generated components and includes detailed configuration files, constants, and peripheral usage. Operation is confirmed on RA6M2 MCU with specified hardware and software environments. The package includes source files for touch configuration, LED control, and main application logic.
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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
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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| Tool News - Release |
PDF
155 KB
日本語
This is the Tool News announcing the revision upgrade to QE for Capacitive Touch V4.2.0, Development Assistance Tool for Capacitive Touch Sensors.
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.
The main revisions are improvements to the sensor drive pulse frequency determined by automatic tuning (CTSU2) and support for the new device "RA0L1 Group, RL78/F22, RL78/F25, and RL78/L23".
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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 | |
| Tool News - Release | PDF 144 KB 日本語 | |
| 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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| Tool News - Release | PDF 147 KB 日本語 | |
| 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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| Tool News - Release | PDF 148 KB 日本語 | |
| Flyer | PDF 412 KB | |
| Application Note |
PDF
3.34 MB
日本語
AI-generated Summary:
Capacitive touch sensing integrates with Renesas RA microcontrollers using QE and FSP tools. The process includes creating a project with RA Smart Configurator, adding required modules, building a capacitive touch interface, tuning with QE for Capacitive Touch, and monitoring touch performance. Supported devices include RA6M2 and RA2L1 with CTSU/CTSU2 units. Development requires e2 studio IDE, GCC ARM compiler, QE for Capacitive Touch plug-in, and FSP middleware. The example demonstrates starting measurements with RM_TOUCH_ScanStart() and detecting touch via RM_TOUCH_DataGet().
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| Tool News - Release | PDF 154 KB 日本語 | |
| Tool News - Release | PDF 262 KB 日本語 | |
| Application Note |
PDF
1.29 MB
日本語
AI-generated Summary:
The guide explains how to measure electrostatic capacitance using the Capacitive Touch Sensing Unit (CTSU) with the Asynchronous General-Purpose Timer (AGT) and low power modes, specifically Deep Software Standby mode, on the RA6M2 microcontroller. It details CPU operation modes, CTSU statuses, register configurations, and peripheral functions involved in capacitive touch sensing. The document includes software descriptions, flowcharts, current consumption measurements, and sample code to support low power capacitive touch implementations.
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22 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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| RA Flexible Software Package (FSP) FSP is an enhanced software package designed to provide easy-to-use, scalable, high-quality software for embedded system designs using Renesas RA Family of Arm Microcontrollers.
Note: FSP with e² studio Installer (Platform Installer) will install the e² studio tool, FSP packs, GCC toolchain, and Segger J-Link drivers required to use this software. No additional installations are required.
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Software Package | 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 |
2 items
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Sample Code
Sample Code
Filters
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| Type | Title | Date Date |
| 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 | RA6M2 Group Capacitive Touch Evaluation System Example Project
Application:
Consumer Electronics
Compiler:
GNU ARM Embedded
Function:
Evaluation Kit, HMI
IDE:
e2 studio
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2 items
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Related Boards & Kits
Boards & Kits
Evaluation
EK-RA6M2
Active
Evaluation Kit for RA6M2 MCU Group
The EK-RA6M2 evaluation kit enables users to effortlessly evaluate the features of the RA6M2 MCU Group and develop embedded systems applications using the Flexible Software Package (FSP) and various IDEs.
Getting Started
Running the Quick Start Example Project
- The EK-RA6M2 board comes... Read More
Recommended Documents:
Product Options
| Part Number | Status | Stock | Budgetary Price (USD) | Sampleable |
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| RTK0EG0021S01001BJ | Active | In Stock | 1u | $152.94 | N/A |
News & Blog Posts
Blog Post Jan 28, 2022 |
Blog Post Nov 18, 2021 |
Blog Post Nov 11, 2021 |
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