LFSTBEB865X Freescale Semiconductor, LFSTBEB865X Datasheet - Page 56

• Manufacturer Part Number: LFSTBEB865X
• Description: Acceleration Sensor Development Tools EVB FOR MMA865xQ
• Manufacturer: Freescale Semiconductor

Specifications of LFSTBEB865X

• Rohs: yes
• Tool Is For Evaluation Of: MMA8652FC, MMA8653FC
• Acceleration: 2 g, 4 g, 8 g
• Sensing Axis: Triple Axis
• Interface Type: USB

The elements of this shake-detection screen are described in the following table.
56
Detection
Settings
Note:
Before
configuring
the
settings,
the Default
Transient
settings
checkbox
must be
unchecked.
Detection
Indicator
(Read only)
Data Plot
Transient
Transient
LPF / HPF
Screen
frame
Default Transient
Settings
Bypass HPF
• Enable X Flag
• Enable Y Flag
• Enable Z Flag
Enable Latch
Threshold
slider
Debounce
slider
Set
Reset
Decrement
Debounce
Clear Debounce
• X Direction X
• Y Direction Y
• Z Direction Z
Event Detected
This frame’s label displays Low-Pass Filter Data Out or High-Pass Filter Data Out, depending on whether
the HP Filter option button has been enabled on the Full-System Evaluation demo’s Operation Mode
screen.
• X-Axis
• Y-Axis
• Z-Axis
(Graph)
• X-Axis
• Y-Axis
• Z-Axis
Element
Table 17. Full-System Evaluation – Transient Detection screen
HPF = High-Pass Filter
Restores all transient-detection settings to the factory default values.
Directs the application to use the raw accelerometer data before it (the raw data) has
been passed through the HPF. The Bypass HPF setting should normally be disabled.
Allows shakes along these axes to trigger the “Event Detected” Indicator on the Demo
Screen.
Causes any triggered event to remain until the Status register is read. If the Enable
Latch checkbox is not enabled, then the interrupt will only last as long as the event,
and the Status register will represent the most-recent event.
Sets the threshold for the minimum g force required for a shake event to be detected.
Shakes at a smaller g-force than this value are filtered out.
Sets the minimum time that a shake must last, for a shake event to be detected.
After changing the Debounce slider, click Set to register the new settings with the
device.
Before configuring the Debounce slider, click Reset to enable the new configuration.
Causes the Debounce timer to be decremented, for each time that an event fails to
reach the debounce time.
Causes the timer set by the Debounce slider to reset, for each time that an event fails
to reach the debounce time.
The indicator(s) switch from red to green when an event is detected along the
specified axis or axes.
This indicator switches from red to green if a transient event is detected.
Each checkbox enables the collection of data along the selected axis or axes.
Displays the data acquired by the accelerometer.
These graph-legend entries give the line color for the respective axes. (Read only)
• To move the Threshold slider, the Reset button must be clicked.
• After moving the Threshold slider, click the Set button to change the setting.
MMA865xFC Sensor Toolbox User’s Guide, Rev. 0
Description
Freescale Semiconductor, Inc.