
Table 51. Time Step for PULSE Time Limit (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
0.159
0.159
0.319
0.638
1.28
1.28
1.28
1.28
0.159
0.159
0.319
0.638
1.28
5.1
5.1
5.1
0.159
0.159
0.159
0.159
0.159
0.159
0.159
0.159
0.159
0.319
0.638
1.28
2.55
10.2
10.2
10.2
0.625
0.625
1.25
2.5
5
5
5
5
0.625
0.625
1.25
2.5
5
20
20
20
0.625
0.625
0.625
0.625
0.625
0.625
0.625
0.625
0.625
1.25
2.5
5
10
40
40
40
0x27: PULSE_LTCY Pulse Latency Timer Register
0x27: PULSE_LTCY Register (Read/Write)
Bit 7
LTCY7
Bit 6
LTCY6
Bit 5
LTCY5
Bit 4
LTCY4
Bit 3
LTCY3
Bit 2
LTCY2
Bit 1
LTCY1
Bit 0
LTCY0
Table 52. PULSE_LTCY Description
LTCY[7:0]
Latency Time Limit. Default value: 0000_0000
The bits LTCY7 through LTCY0 define the time interval that starts after the first pulse detection. During this time interval, all
pulses are ignored. Note: This timer must be set for single pulse and for double pulse.
The minimum time step for the pulse latency is defined in Table 53 and Table 54 . The maximum time is the time step at the ODR
and Oversampling mode multiplied by 255. The timing also changes when the Pulse LPF is enabled or disabled.
Table 53. Time Step for PULSE Latency @ 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 54. Time Step for PULSE Latency @ 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
MMA8451Q
Sensors
Freescale Semiconductor, Inc.
39