33.1 Features

  • Low-Power, High-Sensitivity, Environmentally Robust Capacitive Touch Buttons, Sliders, Wheels and 2D Surface
  • Supports Wake-up on Touch from Standby Sleep Mode
  • Supports Mix-and-Match Mutual and Self-Capacitance Sensing
    • 18/22/32 buttons in Self-Capacitance mode, for 28-/32-/48-pins, respectively
    • 81/121/256 buttons in Mutual Capacitance mode, for 28-/32-/48-pins, respectively
  • One Pin per Electrode – No External Components
  • Load Compensating Charge Sensing:
    • Parasitic capacitance compensation
    • Adjustable gain for superior sensitivity
  • Zero Drift Over the Temperature and VDD Range:
    • Auto-calibration and recalibration of sensors
  • Single-Shot and Free-Running Charge Measurement
  • Hardware Noise Filtering and Noise Signal Desynchronization for High Conducted Immunity
  • Supports Analog Accumulation and Digital Accumulation
  • Driven Shield+ for Superior Noise Immunity and Moisture Tolerance
    • Any PTC X/Y line can be used for the driven shield
    • All enabled sensors will be driven at the same potential as the sensor scanned
  • Boost Mode for Doubled Signal-to-Noise Ratio or 4x Faster Response Time in Mutual Capacitance Systems
  • Selectable Channel Change Delay Allows Choosing the Settling Time on a New Channel, as Required
  • Acquisition-Start Triggered by Command or through Auto-Triggering Feature
  • Low CPU Utilization through Interrupt on Acquisition-Complete
  • Supported by the START QTouch® Configurator Development Tools
  • Window Monitor to Compare Value to Predefined Threshold Values