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MMA8652FCR1 データシート(PDF) 58 Page - Freescale Semiconductor, Inc |
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MMA8652FCR1 データシート(HTML) 58 Page - Freescale Semiconductor, Inc |
58 / 77 page MMA8652FC Sensors 58 Freescale Semiconductor, Inc. 6.11.6 0x28 PULSE_WIND register (Read/Write) Register quick jump table Bits WIND7 – WIND0 define 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 constraints 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. The minimum time step for the pulse window is defined in Table 57 and Table 58. The maximum time is the time step at the ODR, oversampling mode and LPF filter option multiplied by 255. Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 WIND7 WIND6 WIND5 WIND4 WIND3 WIND2 WIND1 WIND0 Figure 52. 0x28: PULSE_WIND Second Pulse Time Window register Table 56. PULSE_WIND register Bit(s) Field Description 7–0 WIND[7:0] Second Pulse Time Window 0000_0000 (default value) Table 57. Time Step for PULSE Detection window at ODR and Power mode (Reg 0x0F) Pulse_LPF_EN = 1 ODR (Hz) Max Time Range (s) Time Step (ms) Normal LPLN HighRes LP Normal LPLN HighRes LP 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 Table 58. Time Step for PULSE Detection window at ODR and Power mode (Reg 0x0F) Pulse_LPF_EN = 0 ODR (Hz) Max Time Range (s) Time Step (ms) Normal LPLN HighRes LP Normal LPLN HighRes LP 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 |
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同様の説明 - MMA8652FCR1 |
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