AN2801的S-TOUCH™硬件调整的指导方针

AN2801的S-TOUCH™硬件调整的指导方针

AN2801

S-Touch hardware tuning guidelines

Introduction
This application note describes the hardware tuning guidelines for a generic S-Touch
capacitive touch module project.
The hardware tuning allows to:
1. Verify that the S-Touch device is operational on the assembled touch module
(I2C communication, POR status, etc).
2. Adjust no-touch inherent inputs capacitance to be approximately at the centre of the
S-Touch dynamic range.
3. Finalize the tuning capacitors’ value, once the dynamic range is adjusted properly.