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FXLS8471Q датащи(PDF) 65 Page - Freescale Semiconductor, Inc |
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FXLS8471Q датащи(HTML) 65 Page - Freescale Semiconductor, Inc |
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65 / 75 page ![]() FXLS8471Q Sensors Freescale Semiconductor, Inc. 65 10.11.8 PULSE_WIND (0x28) register The time step for the pulse-window counter varies with the selected ODR and power modes as defined in Tables 138 and 139. The maximum time value is equal to (time step @ ODR and power mode) x 255. Table 135. Time step for PULSE_LTCY with HP_FILTER_CUTOFF[pls_hpf_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 10.2 0.318 20.4 10 40 1.25 80 1.56 2.56 10.2 0.318 20.4 10 40 1.25 80 Table 136. PULSE_WIND register pls_wind[7:0] 8’b00000000 Table 137. 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 138. Time step for PULSE_WIND with HP_FILTER_CUTOFF[pls_hpf_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 40.8 1.276 81.6 40 160 5 320 1.56 10.2 40.8 1.276 81.6 40 160 5 320 |
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