35.6.1 I/O Lines

Using the I/O lines of the PTC requires the I/O pins to be configured.

The I/O lines used for analog X- and Y-lines must be connected to external capacitive touch sensor electrodes. External components are not necessary for normal operation. However, to reduce the effects of electromagnetic interference, a series resistor of up to 100 kΩ can be added to the Y-lines. In Mutual Capacitance mode, a series resistor of up to 10 kΩ can be added to the X-lines to reduce EMC emissions.

Refer to the Pinout and Multiplexing section in the Pinout chapter and the PORT – I/O Pin Controller chapter for details.