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0x28 PULSE_WIND Register (Read/Write)
0x28: PULSE_WIND Second Pulse Time Window Register
Bit 7
WIND7
Bit 6
WIND6
Bit 5
WIND5
Bit 4
WIND4
Bit 3
WIND3
Bit 2
WIND2
Bit 1
WIND1
Bit 0
WIND0
Table 48. PULSE_WIND Description
WIND[7:0]
Second Pulse Time Window. Default value: 0000_0000.
The bits WIND7 through 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 49 and Table 50 . The maximum time is the time step at the ODR,
Oversampling mode and LPF Filter Option multiplied by 255.
Table 49. Time Step for PULSE Detection Window @ ODR and Power Mode (Reg 0x0F) Pulse_LPF_EN = 1
ODR (Hz)
Normal
Max Time Range (s)
LPLN HighRes
LP
Normal
Time Step (ms)
LPLN HighRes
LP
800
400
200
100
50
12.5
6.25
1.56
0.638
1.276
2.56
5.1
10.2
10.2
10.2
10.2
0.638
1.276
2.56
5.1
10.2
40.8
40.8
40.8
0.638
1.276
1.276
1.276
1.276
1.276
1.276
1.276
0.638
1.276
2.56
5.1
10.2
40.8
81.6
81.6
2.5
5
10
20
40
40
40
40
2.5
5
10
20
40
160
160
160
2.5
5
5
5
5
5
5
5
2.5
5
10
20
40
160
320
320
Table 50. Time Step for PULSE Detection Window @ ODR and Power Mode (Reg 0x0F) Pulse_LPF_EN = 0
ODR (Hz)
Normal
Max Time Range (s)
LPLN HighRes
LP
Normal
Time Step (ms)
LPLN HighRes
LP
800
400
200
100
50
12.5
6.25
1.56
0.318
0.318
0.638
1.276
2.56
2.56
2.56
2.56
0.318
0.318
0.638
1.276
2.56
10.2
10.2
10.2
0.318
0.318
0.318
0.318
0.318
0.318
0.318
0.318
0.318
0.638
1.276
2.56
5.1
20.4
20.4
20.4
1.25
1.25
2.5
5
10
10
10
10
1.25
1.25
2.5
5
10
40
40
40
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
2.5
5
10
20
80
80
80
MMA8453Q
Sensors
Freescale Semiconductor, Inc.
35
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