CHANNEL SCAN LOGIC

摘要

A device that can autonomously scan a sensor panel is disclosed. Autonomous scanning can be performed by implementing channel scan logic. In one embodiment, channel scan logic carries out many of the functions that a processor would normally undertake, including generating timing sequences and obtaining result data; comparing scan result data against a threshold value (e.g., in an auto-scan mode); generating row count; selecting one or more scanning frequency bands; power management control; and performing an auto-scan routine in a low power mode.

主权项

1. A touch subsystem, comprising:
one or more sense channels configurable for receiving one or more sense signals from an event-sensitive panel and providing an output signal indicative of an event or no-event condition on the panel; and channel scan logic coupled to the one or more sense channels and configured to control the one or more sense channels to autonomously scan the event-sensitive panel substantially free of intervention from a processor.