3.2 Touch Sensor - BUTTONx

BUTTONx is the touch sensor input pins, which must be connected to the sensor electrodes via a series resistor to reduce the EMI (Electromagnetic interference) and EMC (Electromagnetic compatibility). The series resistor can be 1-100 kΩ,, depending on the sensor capacitance and desired level of EMC performance. For further details, refer to Microchip Application Note (AN2934) Capacitive Touch Sensor Design.

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