Datasheet
MMA8652FC
Sensors
50 Freescale Semiconductor, Inc.
6.10.6
0x28 PULSE_WIND register (Read/Write)
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 87 and Table 88. The maximum time is the time step at the ODR,
oversampling mode and LPF filter option multiplied by 255.
Table 85. 0x28: PULSE_WIND Second Pulse Time Window register
Back to Register Address Map
Bit
7
Bit
6
Bit
5
Bit
4
Bit
3
Bit
2
Bit
1
Bit
0
WIND7 WIND6 WIND5 WIND4 WIND3 WIND2 WIND1 WIND0
Table 86. PULSE_WIND register
Bit(s) Field Description
7–0 WIND[7:0]
Second Pulse Time Window
0000_0000 (default value)
Table 87. 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 88. 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