RL78/G22 电容式触摸评估系统

AI 生成的摘要: 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.

AI 生成的摘要: 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.

AI 生成的摘要: The document explains how to develop low power capacitive touch applications using the RL78 Family's SNOOZE Mode Sequencer (SMS). It details the procedure for implementing auto judgement measurement with SMS on RL78/G22 and RL78/G23 devices, including module flows, external pin wiring for RL78/G22, and software configuration steps. The guide covers project creation with Smart Configurator, touch interface development, sensor tuning with QE, and middleware integration to optimize capacitive touch functionality while minimizing power consumption.

AI 生成的摘要: Capacitive touch measurement achieves low power consumption by using the SNOOZE Mode Sequencer (SMS) and Multiple Electrode Connection (MEC) functions. SMS executes up to 32 processes independently of the CPU during standby, reducing power usage. MEC connects multiple electrodes as one in self-capacitance mode, enabling efficient measurement. The sample program measures multiple electrodes in normal mode and combines them in low power mode. The guide details peripheral usage, operation conditions, measurement cycles, and current consumption measurement methods.

AI 生成的摘要: The Capacitive Touch Sensing Unit (CTSU2L) measures electrostatic capacitance changes caused by finger proximity using self-capacitance and mutual capacitance methods. It supports up to 32 channels depending on the device, with operating voltages from 1.8 to 5.5 V. The unit counts clock cycles to detect capacitance variations and includes features such as noise prevention, calibration, and low-power SNOOZE mode. It offers flexible measurement modes, power supply switching for transmit pins, and interrupt-driven data handling. The document details CTSU2L’s architecture, pin configurations, measurement principles, and operational settings for RL78 microcontrollers.