Touch Surface Sensor Configuration

The QT2 Xplained Pro 2D surface is configured with the Atmel START for one-finger gesture detection. The various configuration parameters for sensors are shown in the table below:

Table 1. Touch Surface Sensor Configuration Parameters
Parameter Value
Sensor type Mutual capacitance
Touch measurement period 20 ms
Analog gain 1
Digital gain 2
Charge share delay 2
Filter level 16
Sensor threshold level 25
Surface resolution (Bits) 7 bits