【通信应用笔记】S- TOUCH设备：系统考虑.pdf

【通信应用笔记】S- TOUCH设备：系统考虑.pdf
AN2693
Application note

S-Touch devices: system considerations

Introduction
This application note discusses some of the system level factors that can influence the
touch detection of capacitive touch sensors. The various size, shape and materials used in
sensors pose a challenge to the design of a reliable touch device. The environmental effects
(temperature, humidity, EMI) also influence the sensor’s performance.
Using a finite state machine approach, the S-Touch capacitive touch sensors are totally
hard-wired and thus able to pr