Overview
Description
This reference design introduces a home appliance panel UI demo based on the RL78/G22 and its capacitive touch sensing unit (CTSU2La), designed to evaluate low-power capacitive touch interfaces. The demo uses the Multiple Electrode Connection (MEC) function to treat multiple touch electrodes as a single input, enabling efficient standby wake-up detection with fewer scans and reduced power consumption. By adjusting sensitivity, the same approach also supports proximity-style sensing, making it suitable for early-stage UI concept evaluation and design studies.
Features
- Uses the RL78/G22 MCU
- Uses the RL78/G22 CPU board included in the RSSK-RL78G22, and an electrode board that has 7 self-capacitive buttons and 25 LEDs
- The front panel works as a touch button and touchless sensor using the same electrode
- MEC function allows sensing of multiple electrodes by single measurement
- Low power consumption by MEC function
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Videos & Training
We will show an appliance UI demo using Capacitive Touch of RL78/G22.
The Capacitive Touch of RL78/G22, with high sensitivity and high noise immunity, enables well-designed user interface with good functionality and can be achieved with ultra-low current consumption.
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