Freescale Semiconductor FRDM-FXS-MULTI 데이터 시트
FXOS8700CQ
Sensors
72
Freescale Semiconductor, Inc.
10.12.8 PULSE_WIND (0x28) register
The time step for the pulse-window counter varies with the selected ODR and power modes as defined in
Tables
and
.
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
shown in
Tables
and
Table 138. 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 139. PULSE_WIND register
pls_wind[7:0]
0b0000_0000
Table 140. 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.
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 141. 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