Overview
Description
The Smart Wake Up reference design enables low-power consumption standby with a capacitive touch evaluation system.
Features
- Low‑power standby consumption of approximately 90% less current than conventional operation (with 12 channels); automatic judgment, multiple‑electrode connection, and snooze functions significantly reduce current consumption.
- Evaluation tool is ready to use; both hardware and sample software are ready to use.
- Proposal of applications assuming use cases; preparing a demonstration of use cases for proximity operation, which is in high demand.
Applications
Documentation
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| Type | Title | Date |
| PCB Design Files | ZIP 860 KB | |
| Manual - Development Tools | PDF 944 KB 日本語 | |
| 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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| PCB Design Files | ZIP 2.54 MB | |
| Application Note |
PDF
712 KB
日本語
AI-generated Summary:
The RX140 Group Smart Wakeup Solution enables low power standby by utilizing the CTSU2SL module's automatic judgment and multi-electrode connection functions. It measures multiple self-capacitance electrodes simultaneously to reduce measurement time and power consumption. The system wakes from standby when a finger approaches a button (approx. 20 mm) or a palm covers multiple buttons (approx. 60 mm), triggering LED lighting based on touch input. The software integrates modules like LPC, DTC, LPT, and ELC to manage low power transitions and touch detection, ensuring efficient operation in touchless applications.
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| Application Note |
PDF
1.52 MB
日本語
AI-generated Summary:
The Smart Wakeup Solution software enables low power standby on the RX140 capacitive touch evaluation system by utilizing the CTSU2SL module's automatic judgment and multi-electrode connection functions. It measures multiple electrodes simultaneously to reduce power consumption and shortens measurement time. The system wakes up from standby mode upon detecting touch input on any of the 12 connected electrodes, triggering normal operation with LED feedback. The software integrates modules such as LPC, DTC, LPT, and ELC to manage low power transitions and touch measurements at 100 ms intervals without CPU activation unless a touch is detected. The document details software structure, operation environment, capacitive touch settings, and power consumption measurement methods.
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6 items
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Design & Development
Sample Code
Sample Code
Filters
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| Type | Title | Date Date |
| Sample Code | RX140 Group Smart Wakeup Solution Rev.1.00
[Software=QE CTSU module(FIT)|v2.10],[Software=QE TOUCH moduleo(FIT)|v2.10],[Toolchains=CC-RX|v3.04.00]
ZIP
16.93 MB
日本語
Application:
Renewable Energy & Grid
Compiler:
CC-RX
Function:
HMI
IDE:
e2 studio
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1 item
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Related Boards & Kits
Boards & Kits
Capacitive Touch Evaluation System for RX140
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Configuration
- RX140 CPU board
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Capacitive Touch Proximity Touch Reference Design
The Touchless Button Reference Design can detect the approach of fingers and hands without physical contact using Renesas’ capacitive touch solution. The electrode detects the proximity of the finger via self-capacitance and turns on the LED. The demo solution is compatible with all types of... Read More
Videos & Training
This video introduces a smart wake-up solution that can reduce standby current consumption by more than 90% compared to conventional products. The hardware uses the RX140 capacitive touch evaluation system and touchless button demo.
Related resources:
Additional Videos
Support
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