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FXOS8700CQ датащи(PDF) 42 Page - Freescale Semiconductor, Inc |
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FXOS8700CQ датащи(HTML) 42 Page - Freescale Semiconductor, Inc |
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42 / 86 page ![]() Sensors 42 Freescale Semiconductor, Inc. Please note that when the part is operated in hybrid mode, the ODR is reduced by a factor of two, which also affects the filter cutoff frequency. For example, an ODR setting of 400 Hz in accelerometer only mode with HP_FILTER_CUTOFF[sel] = 0b10 sets the cutoff frequency at 4 Hz. If the part is operated in Hybrid mode, the effective ODR becomes 200 Hz and the cutoff frequency is now 2 Hz for the same ODR and HP_FILTER_CUTOFF[sel] settings. 9.8 Portrait/Landscape Detection The FXOS8700CQ is capable of detecting six orientations: Landscape Left, Landscape Right, Portrait Up, and Portrait Down with Z-lockout feature as well as Face Up and Face Down orientation as shown in Figures 36, 37 and 38. For more details on the meaning of the different user configurable settings and for example code, please refer to Freescale application note AN4068. Figure 36. Illustration of Z-tilt angle lockout transition . Figure 37. Illustration of landscape to portrait transition 12.5 0.5 0.125 4 0.063 0.25 0.063 2 0.031 6.25 0.5 0.063 4 0.031 0.25 0.031 2 0.016 1.56 0.5 0.016 4 0.008 0.25 0.008 2 0.004 Table 38. HP_FILTER_CUTOFF NORMAL 90 ° Z-LOCK = 32.142° 0° DETECTION LOCKOUT REGION Portrait Landscape to Portrait 90 ° Trip Angle = 60 ° 0° Landscape |
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