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 using the NuMicro® M258 microcontroller. Functions include 12 capacitive touch sensors, real-time LCD COM/SEG status display through the LCDView tool, and the display of water level detection results. The resolution can detect changes in water level height of 1 cm.

• Features
  

  -	12 capacitive Touch Key sensors
  -	Uses 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: 48 MHz
  -	Touch key controller with high touch sensitivity and high-noise immunity
  -	LCD controller with remaining display in power down mode

• System Block Diagram