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FXLS8471Q Datasheet(PDF) 65 Page - Freescale Semiconductor, Inc

Part # FXLS8471Q
Description  Linear Accelerometer
PDF  75 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

FXLS8471Q Datasheet(HTML) 65 Page - Freescale Semiconductor, Inc

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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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