Freescale Semiconductor FRDM-FXS-MULTI 데이터 시트
MMA8652FC
Sensors
44
Freescale Semiconductor, Inc.
6.10
Pulse configuration and status registers
For more information about of how to configure the tap detection and sample code, see application note AN4083, Data
Manipulation and Basic Settings for Xtrinsic MMA865xFC Accelerometers. The tap detection registers are referred to as “Pulse”.
Manipulation and Basic Settings for Xtrinsic MMA865xFC Accelerometers. The tap detection registers are referred to as “Pulse”.
6.10.1
0x21: PULSE_CFG Pulse Configuration register
The PULSE_CFG register configures the event flag for tap detection, enabling/disabling the detection of a single and double
pulse on each of the axes.
pulse on each of the axes.
Table 67. 0x21 PULSE_CFG register (Read/Write)
Back to Register Address Map
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
DPA
ELE
ZDPEFE
ZSPEFE
YDPEFE
YSPEFE
XDPEFE
XSPEFE
Table 68. PULSE_CFG register
Bit(s)
Field
Description
Notes
7
DPA
Double Pulse Abort
0 Double Pulse detection is not aborted if the start of a pulse is detected during
0 Double Pulse detection is not aborted if the start of a pulse is detected during
the time period specified by the PULSE_LTCY register. (default)
1 Setting the DPA bit momentarily suspends the double tap detection if the
start of a pulse is detected during the time period specified by the
PULSE_LTCY register, and the pulse ends before the end of the time period
specified by the PULSE_LTCY register.
PULSE_LTCY register, and the pulse ends before the end of the time period
specified by the PULSE_LTCY register.
6
ELE
Pulse event flags are latched into the PULSE_SRC register.
Reading of the PULSE_SRC register clears the event flag.
Reading of the PULSE_SRC register clears the event flag.
0 Event detection is disabled (default)
1 Event detection is enabled
1 Event detection is enabled
5
ZDPEFE
Event flag enable for a double pulse event on Z-axis
4
ZSPEFE
Event flag enable for a single pulse event on Z-axis
3
YDPEFE
Event flag enable for a double pulse event on Y-axis
2
YSPEFE
Event flag enable for a single pulse event on Y-axis
1
XDPEFE
Event flag enable for a double pulse event on X-axis
0
XSPEFE
Event flag enable for a single pulse event on X-axis