Nuvoton’s touch solutions provide not only touch functionality but also the ability to detect water levels. Capacitive water level detection is a system product developed by NuMicro® M258SG6AE microcontroller. Functions include 3 capacitive touch sensors, real-time LCD COM/SEG status through LCDView tool, and display of water level detection results. The resolution can detect changes in water level height of 1 cm.

• Feature
  

  -	3 capacitive Touch Key sensor
  -	Use LCDView tool to emulates real-time LCD COM/SEG status and display water level detection results
  -	The resolution can detect changes in water level height of 1 cm

• Specifications
  

  M258 (32-bit Arm® Cortex®-M23)
  -	Operating frequency up to 48 MHz
  -	Touch key controller with high touch sensitivity and high-noise immunity
  -	LCD controller with remain display in power down mode

• System Block Diagram