Maximum ON Duration

If an object unintentionally contacts a sensor resulting in a touch detection for a prolonged interval it is usually desirable to recalibrate the sensor in order to restore its function, perhaps after a time delay of some seconds.

The Maximum on Duration timer monitors such detections; if detection exceeds the timer’s settings, the sensor is automatically recalibrated. After a recalibration has taken place, the affected sensor once again functions normally even if it still in contact with the foreign object.

Max on duration can be disabled by setting it to zero (infinite timeout) in which case the channel never recalibrates during a continuous detection (but the host could still command it).

Setting

Variable name

Data Type

Unit

Min

Max

Typical

Maximum ON Duration

qt_max_on_duration

uint8_t

200 ms

0

255

30 (6s)