RL78/G23 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 document explains a method to achieve low power consumption in capacitive touch measurement using the RL78/G23 microcontroller's CTSU2L unit combined with the SNOOZE mode and a 32-bit interval timer. It details intermittent CPU operation controlled by the timer to reduce power usage to about 1/238 compared to continuous measurement. The system measures a single touch button at fixed intervals, activating full operation only upon touch detection. The guide covers peripheral module coordination, hardware and software setup, current consumption measurement, and sample code for implementing this low-power touch sensing solution.

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 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.

AI 生成的摘要: The RL78/G23 Capacitive Touch Evaluation System includes factory default firmware for the RL78/G23 MCU, enabling demonstration of capacitive touch functions. The firmware operates on a 5.0V supply and runs on the RL78/G23 CPU and application boards. Programming requires Renesas Flash Programmer and E2 Emulator Lite. The document details specifications, operation conditions, programming instructions, and provides references to user manuals and support resources. It also includes general precautions for handling microcontroller products, emphasizing ESD protection, power-on processing, signal input restrictions, and proper pin handling to ensure device reliability and safety.