Freescale Semiconductor FRDM-FXS-MULTI 데이터 시트
MMA8652FC
Sensors
46
Freescale Semiconductor, Inc.
6.10.3
0x23 – 0x25: PULSE_THSX, Y, Z Pulse Threshold for X, Y and Z registers
The pulse threshold can be set separately for the X, Y, and Z axes. The PULSE_THSX, PULSE_THSY and PULSE_THSZ
registers define the threshold that is used by the system to start the pulse detection procedure.
registers define the threshold that is used by the system to start the pulse detection procedure.
•
The threshold values range from 1 to 127, with steps of 0.63 g/LSB at a fixed ±8 g acceleration range, thus the minimum
resolution is always fixed at 0.063 g/LSB.
resolution is always fixed at 0.063 g/LSB.
•
The PULSE_THSX, PULSE_THSY and PULSE_THSZ registers define the threshold which is used by the system to start
the pulse detection procedure.
the pulse detection procedure.
•
The threshold value is expressed over seven bits as an unsigned number.
Table 71. 0x23 PULSE_THSX register (Read/Write)
Back to Register Address Map
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
THSX6
THSX5
THSX4
THSX3
THSX2
THSX1
THSX0
Table 72. PULSE_THSX register
Bit(s)
Field
Description
6–0
THSX[6:0]
Pulse threshold on X-axis
000_0000 (default)
000_0000 (default)
Table 73. 0x24 PULSE_THSY register (Read/Write)
Back to Register Address Map
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
THSY6
THSY5
THSY4
THSY3
THSY2
THSY1
THSY0
Table 74. PULSE_THSY register
Bit(s)
Field
Description
6–0
THSY[6:0]
Pulse threshold on Y-axis
000_0000 (default value)
000_0000 (default value)
Table 75. 0x25 PULSE_THSZ register (Read/Write)
Back to Register Address Map
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
THSZ6
THSZ5
THSZ4
THSZ3
THSZ2
THSZ1
THSZ0
Table 76. PULSE_THSZ register
Bit(s)
Field
Description
6–0
THSZ[6:0]
Pulse threshold on Z-axis
000_0000 (default)
000_0000 (default)