LFSTBEB865X Freescale Semiconductor, LFSTBEB865X Datasheet - Page 34

• 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

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Tap choice:
Double tap
Operation
Dynamic
Single or
Standby
Single +
Screen
Choose
Range
frame
Active
Mode
Sample Rate
Over-Sampling
Options for Data
Auto Calibrate
• 2g
• 4g
• 8g
Standby
Active
• Standby Mode
• Wake Mode
• Sleep Mode
LPF Enable
HPF Bypass
Field or option
Table 9. Directional Tap – Active/Standby screens
MMA865xFC Sensor Toolbox User’s Guide, Rev. 0
Enables you to change the rate at which the device acquires data.
Normal Mode
Hi Res Mode
Low Power Mode
Low Noise Low Power
Directs the device to calculate the offsets for each axis (accounting for any error in
measurements). For maximum resolution, the calibration is done with a dynamic range of
8g and a sample rate of 1.563 Hz.
Note: Before enabling Auto Calibrate mode, place the device on a flat and stationary
Sets the range over which the accelerometer acquires data.
Sets the device to Standby mode.
Sets the device to Active mode.
Indicates the device’s status.
Note: The device will never enter Sleep mode during this demo.
LPF = Low-Pass Filter
Sends accelerometer data through a low-pass filter before it is processed by the tap
application.
This filter treats higher frequency signals as noise, filtering out very fast shocks (to prevent
them from being detected as taps).
HPF = High-Pass Filter
Sends the raw accelerometer data to the tap application, bypassing the high-pass filter.
• The HPF Bypass option button normally should be cleared.
• Enabling the HPF Bypass can cause non-tap events (such as tilting the device) to be
registered as taps.
surface.
Normal operation.
The device gives more accurate readings, but draws more
current.
The device draws less current than Normal mode does, but at
the expense of accuracy.
The device draws more current than Normal mode does, but
less current than Low Power mode does, and reduces noise.
Note: In Low Noise mode, any g-force greater than ±4g will not
be read.
Description
Freescale Semiconductor, Inc.