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FXOS8700CQ 데이터시트(PDF) 62 Page - Freescale Semiconductor, Inc |
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FXOS8700CQ 데이터시트(HTML) 62 Page - Freescale Semiconductor, Inc |
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62 / 86 page ![]() Sensors 62 Freescale Semiconductor, Inc. 9.12.8 PULSE_WIND (0x28) register The time step for the pulse window counter varies with the selected ODR and power modes as defined in Tables 81 and 82. The maximum time value is equal to (time step @ ODR and power mode) x 255. Please note that when the device is operated in hybrid mode, the effective ODR is half of what is selected in CTRL_REG1, which will double the time step value from what is shown in Table 81 and Table 82. Table 80. Time step for PULSE Latency @ ODR and power mode LPE_EN = 0 ODR (Hz) Max time range (s) Time step (ms) Normal LPLN High resolution Low power Normal LPLN High resolution Low power 800 0.318 0.318 0.318 0.318 1.25 1.25 1.25 1.25 400 0.318 0.318 0.318 0.638 1.25 1.25 1.25 2.5 200 0.638 0.638 0.318 1.276 2.5 2.5 1.25 5 100 1.276 1.276 0.318 2.56 5 5 1.25 10 50 2.56 2.56 0.318 5.1 10 10 1.25 20 12.5 2.56 10.2 0.318 20.4 10 40 1.25 80 6.25 2.56 20.4 0.318 40.8 10 80 1.25 160 1.56 2.56 81.6 0.318 163.2 10 320 1.25 640 pls_wind[7:0] 0b00000000 Figure 77. PULSE_WIND register Table 81. PULSE_WIND bit description Field Description pls_wind[7:0] pls_wind[7:0] defines the maximum interval of time that can elapse after the end of the latency interval in which the start of the second pulse event must be detected provided the device has been configured for double pulse detection. The detected second pulse width must be shorter than the time limit constraint specified by the PULSE_TMLT register, but the end of the double pulse need not finish within the time specified by the PULSE_WIND register. Table 82. Time step for PULSE detection window @ ODR and power mode LPF_EN = 1 ODR (Hz) Max time range (s) Time step (ms) Normal LPLN High resolution Low power Normal LPLN High resolution Low power 800 0.638 0.638 0.638 0.638 2.5 2.5 2.5 2.5 400 1.276 1.276 1.276 1.276 5 5 5 5 200 2.56 2.56 1.276 2.56 10 10 5 10 100 5.1 5.1 1.276 5.1 20 20 5 20 50 10.2 10.2 1.276 10.2 40 40 5 40 12.5 10.2 40.8 1.276 40.8 40 160 5 160 6.25 10.2 81.6 1.276 81.6 40 320 5 320 1.56 10.2 326 1.276 326 40 1280 5 1280 |
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