3.3.8 Adjacent Key Suppression™ (AKS™)

AKS can be used when touching multiple buttons is NOT allowed or not desired in a system. When buttons are physically close to each other, there is a possibility that touching one button will cause a rise in the touch delta value on the adjacent, button which may also be caused by pressing between buttons with no or only a minor gap between them. Sometimes, the delta raised in other buttons may cross the threshold and lead to a false report of touch.

To control such behavior, buttons that are physically closer to each other can be configured in the same AKS group. Only the first button (which goes in to detect) will be reported as touched in a given AKS group. All other button states will be suppressed, even if their delta crosses the threshold value.

This device supports up to seven AKS groups.

Steps to Configure AKS

The AKS value for Button N can be updated by writing in the Channel AKS Group (AKSGRP [n]) register. Refer to the Configuration Summary for more details.