AN2927用于触摸感应应用的RC感应原理

AN2927用于触摸感应应用的RC感应原理

AN2927
Application note

RC acquisition principle for touch sensing applications

Introduction
In applications requiring user interface, capacitive touch-sensitive controls are becoming the
solution of choice to replace conventional electro-mechanical switches.
STMicroelectronics has developed a complete touch-sensing software library to transform
any 8-bit STM8 microcontroller into a capacitive touchkey controller. For more details,
please go to www.st.com/mcu
This touch sensing software library allows to detect human touch by