Apparatus and method for reducing average scan rate to detect a conductive object on a sensing device
First Claim
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1. An apparatus comprising:
- a processing device comprising a plurality of capacitance sensors and a plurality of pins; and
a switch circuit coupled to the processing device and to a plurality of capacitive sense elements coupled to the plurality of pins, wherein the processing device is to select a first capacitance sensor of the plurality of capacitance sensors to couple to a first group of two or more of the plurality of capacitive sense elements via the switch circuit in a first mode and to couple the first capacitance sensor to an individual one of the two or more of the plurality of capacitive sense elements in a second mode.
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Abstract
A switch circuit and method is described. In one embodiment, the switch circuit is configured to couple each of a plurality of plurality of capacitive sense elements and a plurality of capacitance sensors in different modes. In a first mode, the switch circuit is configured to couple each of the plurality of capacitance sensors to a group of two or more of the plurality of capacitive sense elements. In a second mode, the switch circuit is configured to couple the plurality of capacitance sensors to individual ones of the two or more of the plurality of capacitive sense elements in one of the groups.
495 Citations
20 Claims
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1. An apparatus comprising:
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a processing device comprising a plurality of capacitance sensors and a plurality of pins; and a switch circuit coupled to the processing device and to a plurality of capacitive sense elements coupled to the plurality of pins, wherein the processing device is to select a first capacitance sensor of the plurality of capacitance sensors to couple to a first group of two or more of the plurality of capacitive sense elements via the switch circuit in a first mode and to couple the first capacitance sensor to an individual one of the two or more of the plurality of capacitive sense elements in a second mode. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus comprising:
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a processing device; and a switch circuit comprising; a plurality of inputs to couple to a plurality of capacitive sense elements, and a plurality of outputs to couple to a plurality of capacitance sensors, wherein the switch circuit is configured to couple two or more of the plurality of inputs together in a first group and to couple the first group to one of the plurality of outputs in a first mode, wherein the switch circuit is configured to couple an individual one of the two or more of the plurality of inputs to the one of the plurality of outputs in a second mode. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A system comprising:
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a sensing panel comprising a plurality of capacitive sense elements; a processing device coupled to the sensing panel via a plurality of pins coupled to the plurality of capacitive sense elements, wherein the processing device comprises a switch circuit, wherein the switch circuit comprises; a plurality of inputs to couple to the plurality of capacitive sense elements; and a plurality of outputs to couple to a plurality of capacitance sensors, wherein the switch circuit is configured to couple two or more of the plurality of inputs together in a first group and to couple the first group to one of the plurality of outputs in a first mode, wherein the switch circuit is configured to couple an individual one of the two or more of the plurality of inputs to the one of the plurality of outputs in a second mode. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification