KW40Z_Connectivity_Software_1.0.1 (KSDK_1.3.0); IAR 7.50;
On a MKW30Z requiring one pin for capacitive touch TSI sensing circuit PTC3 muxed to TSI0_CH15
The TSI plate is not mounted on PCB, but via a small coax cable less than 10 cm to a brass metal knob on the metal case isolated from the case.
The reference article AN3863: Designing Touch Sensing does not give references for outside pcb sensors.
There are some specifications on how to adapt the button ?
Pull-up resistor is required ?
There is a need for additional parallel capacitance ?