Channel scan logic
AssigneeApple Inc.
InventorsMinh-Dieu Thi VU, Thomas James WILSON, Christoph H. KRAH
Life of this patent
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Abstract
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.
Claims20
An electronic device, comprising:
- channel scan logic configurable for being coupled to an event-sensitive panel that provides one or more output signals indicative of an event condition on the panel;
- wherein the channel scan logic is further configurable to adjust a range of rows on the panel to be automatically scanned in a single low-power scan to detect an event condition substantially free of processor control.
A method of scanning an event sensitive panel, comprising:
- adjusting a range of rows on the panel to be automatically scanned in a single low-power scan to detect an event condition substantially free of processor control;
- autonomously scanning the range of rows on the panel for the event condition;
- detecting the event condition on the panel;
- and
- waking up a processor upon the detection of the event condition.
A non-transitory computer-readable storage medium having stored thereon instructions which, when executed by a programmable electronic device, causes the electronic device to perform a method comprising:
- adjusting a range of rows on an event-sensitive panel to be automatically scanned in a single low-power scan to detect an event condition substantially free of processor control;
- autonomously scanning the range of rows on the panel for the event condition;
- detecting the event condition on the panel;
- and
- waking up a processor upon the detection of the event condition.
Dependencies are inferred from the claim text.