In the touch design, the recommend Cmod is 2.2 nf. What will happen, if I use 1.1 nf capacitance as the modulation capacitance?
How to choose a suitable value capacitor? After all, different product have different Cp.
I choose 1K resistor between the MCU touch IO and touch sensor. What is the effect of the size of this resistor?
Please refer following document.
AN85951 - PSoC® 4 and PSoC® 6 MCU CapSense® Design Guide
These are described in the section 3.1 "CapSense CSD Sensing Method"