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AN3308 датащи(PDF) 38 Page - STMicroelectronics |
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AN3308 датащи(HTML) 38 Page - STMicroelectronics |
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38 / 52 page ![]() Click and double click recognition AN3308 38/52 Doc ID 18198 Rev 1 8.4.3 Playing with TAP_Window In cases of double click recognition, the TAP_Latency + TAP_Window defines the maximum distance between two consecutive clicks to be recognized as a double click event. By fixing the latency to avoid spurious bouncing of the signal, it is possible to play with the TAP_Window as with the “double click speed” settings of the mouse properties on the PC. Figure 21 shows an acquisition done with TAP_Window = 42h (1065 ms). With this setting the two consecutive peaks of acceleration are too far apart and the second one occurs outside of the window. In Figure 22 an acquisition carried out with TAP_Window = FFh (637 ms) is shown. With this setting the device correctly generates the double click interrupt after the second acceleration peak. Figure 21. Short window Figure 22. Long window |
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