CHANNEL SCAN LOGIC
First Claim
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1. A method for detecting an object touching or hovering near a touch sensor panel, comprising:
- continuously and autonomously scanning the touch sensor panel substantially free of intervention from a processor and storing scan data in a first memory unit until a first event is detected;
moving the stored scan data to a second memory unit when the first event is detected; and
resuming the scanning of the touch sensor panel when a second event is detected.
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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.
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Citations
18 Claims
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1. A method for detecting an object touching or hovering near a touch sensor panel, comprising:
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continuously and autonomously scanning the touch sensor panel substantially free of intervention from a processor and storing scan data in a first memory unit until a first event is detected; moving the stored scan data to a second memory unit when the first event is detected; and resuming the scanning of the touch sensor panel when a second event is detected. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for detecting an object touching or hovering near a touch sensor panel, comprising:
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a touch sensor panel; first and second memory units; and scan logic communicatively coupled to the touch sensor panel and the first memory unit and configured for continuously and autonomously scanning the touch sensor panel substantially free of intervention from a processor and storing scan data in the first memory unit until a first event is detected, moving the stored scan data to the second memory unit when the first event is detected, and resuming the scanning of the touch sensor panel when a second event is detected. - View Dependent Claims (7, 8, 9, 10)
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11. A method for detecting an object touching or hovering near a touch sensor panel, comprising:
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scanning a first portion of the touch sensor panel substantially free of intervention from a processor; processing data obtained from the scan of the first portion while waiting for permission to scan a second portion of the touch sensor panel; and scanning the second portion after receiving permission to scan the second portion. - View Dependent Claims (12, 13, 14)
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15. An apparatus for detecting an object touching or hovering near a touch sensor panel, comprising:
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a touch sensor panel; scan logic communicatively coupled to the touch sensor panel and configured for scanning a first portion of the touch sensor panel substantially free of intervention from a processor, processing data obtained from the scan of the first portion while waiting for permission to scan a second portion of the touch sensor panel, and scanning the second portion after receiving permission to scan the second portion. - View Dependent Claims (16, 17, 18)
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Specification