MULTI-TOUCH AUTO SCANNING

摘要

A system and method for autonomously scanning a sensor panel device is disclosed. A sensor panel processor can be disabled after a first predetermined amount of time has elapsed without the sensor panel device sensing any events. One or more system clocks can also be disabled to conserve power. While the processor and one or more system clocks are disabled, the sensor panel device can periodically autonomously scan the sensor panel for touch activity. If one or more results from the autonomous scans exceed a threshold, the sensor panel device re-enables the processor and one or more clocks to actively scan the sensor panel. If the threshold is not exceeded, the sensor panel device continues to periodically autonomously scan the sensor panel without intervention from the processor. The sensor panel device can periodically perform calibration functions to account for any drift that may be present in the system.

主权项

1. A system for scanning a sensor panel, comprising:
auto-scan logic configured to place the system in an auto-scan mode after a first predetermined amount of time elapses without any events being detected on the sensor panel; and a calibration timer configured for periodically returning the system to an active scan mode and initiating a calibration scan upon expiration of a calibration time.