LFSTBEB865X Freescale Semiconductor, LFSTBEB865X Datasheet - Page 35

• 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

Freescale Semiconductor, Inc.
(both tap and
configuration
configuration
configuration
(double tap)
double tap)
(single tap)
Screen
frame
Tap
Tap
Tap
• X Threshold
• Y Threshold
• Z Threshold
Set XYZ
Thresholds
Reset XYZ
Thresholds
Enable Latch
Set Time Limit
Reset Time Limit
• Enable X SP
• Enable Y SP
• Enable Z SP
Pulse Time Limit
Default Single Tap
• Enable X DP
• Enable Y DP
• Enable Z DP
Pulse Latency
Second Pulse
Latency
Ignore Latent
Pulses
Default Single +
Double Tap
Field or option
Table 9. Directional Tap – Active/Standby screens (Continued)
MMA865xFC Sensor Toolbox User’s Guide, Rev. 0
Sets the G threshold for a tap to be detected along the designated axis.
Pulses with a G value less than the setting will be ignored.
Note: Before changing the values of the X, Y, or Z threshold sliders, click
Causes any triggered event to remain until the Status register is read.
If this 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 Pulse Time
Limit.
Resets the Pulse Time
Limit.
(Enable Single Pulse)
Allows flicks along these axes to trigger the “Event Detected” Indicator on the Demo
Screen.
Sets the maximum time that a pulse can last before it (the pulse) is ignored as a non-tap
event.
Sets the parameters for detecting single taps to the factory-defined values.
To configure this frame’s other values, the Default Single Tap option button must be
cleared.
(Enable Double Pulses)
Enables detection of double pulses along the specified axis or axes.
For example, if you only want to see double taps on the right side of the device, then clear
the Z and Y DP checkboxes.
Sets the amount of time that the device waits after a pulse, before registering the next
pulse. Subsequent pulses that occur within this period are ignored.
Sets the amount of time that the device will wait to reset, after receiving an initial pulse.
A pulse detected after the set time will be considered a new first pulse.
Causes the device to ignore the Pulse Latency timer (set by the Pulse Latency Slider) and
to detect taps directly after other taps.
Sets the threshold for detecting single and double pulses to the factory-defined values.
To configure this frame’s other values, the Default Single + Double Tap option button must
be cleared.
• Before using the sliders, you must click the Reset XYZ Thresholds button.
• After using the sliders, click the Set XYZ Thresholds button.
• The Enable Latch setting should be enabled for the tap detection to work properly.
• If Enable Latch is disabled, then tap events will trigger multiple interrupts, instead of
• Before using the Pulse Time Limit slider, you must click the Reset Time Limits button.
• After using the Pulse Time Limit slider, click the Set Time Limits button to change the
triggering a single interrupt.
setting.
Reset XYZ Thresholds.
After changing the value of any of the axis threshold slider settings, click
Set XYZ Thresholds.
Note: Before resetting the value of the Pulse Time Limit slider,
click Reset Time Limit.
After changing the value of the Pulse Time Limit slider,
click Set Time Limit.
Description
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