Capacitive touch microcontroller
STMicroelectronics

STMicroelectronics STM8-TOUCH-LIB is a touch sensing library that provides a complete robust free source-code solution to transform any 8-bit STM8 microcontroller into a capacitive touch sensing controller. This solution allows designers familiar with the use of standard microcontrollers to create higher-end human interfaces by replacing conventional electromechanical switches by touch sensing keys.

The STM8 touch sensing library is part of the application firmware. It allows combining various capacitive sensing touchkey, wheels or sliders with traditional MCU features (communications, control of LEDs, beeper or LCD) in the same application.

Two acquisition principles, RC and CT, are available and can be configured at compiling level. Both acquisition principles offer the same advanced processing algorithms to filter out noise and to compensate environmental parameters such as temperature, humidity, and power supply variation.