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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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QST108AM1 Datasheet(PDF) 12 Page - STMicroelectronics |
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QST108AM1 Datasheet(HTML) 12 Page - STMicroelectronics |
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12 / 51 page  QST touch sensing technology QST108 12/51 Figure 4 illustrates an example of the drift compensation algorithm following a temperature change. Figure 4. Drift compensation example 3.11 Adjacent key suppression (AKS™) Adjacent key suppression (AKS™) is a Quantum-patented feature which prevents multiple keys from responding to a single touch. This can happen with closely spaced keys, or a scroll wheel that has buttons very near it. The QST108 supports two AKS modes: ● Locking AKS Once a key is considered as “touched”, all other keys are locked in an untouched state. To unlock these keys, the touched key must return to an untouched state. Then, the key having the lowest key ID number is declared as the “touched” one. ● Unlocking AKS On each acquisition, the signal strengths from each key are compared and the key with the highest signal level is declared as the “touched” one. In I2C mode, up to 8 AKS groups can be specified. Note: All keys belonging to the same AKS group must have the same AKS mode. Reference + DeTh Reference Count Reference Count + PosRelTh Time Drift Compensation Temperature Change |
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