LFSTBEB865X Freescale Semiconductor, LFSTBEB865X Datasheet - Page 24

• 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

24
Screen frame
Configuration
Datalogger
Operation
Operation
Dynamic
Range
Mode
FIFO
Data Source
Method
Sensor Rate
Enable Low Noise
Over-Sampling
Options for Data
Auto Calibrate
• 2g
• 4g
• 8g
To use the functions in this frame, the Method drop-down field must be set to FIFO.
Fill Buffer
option button
Circular Buffer
option button
Watermark
slider
Field or option
Table 5. Graphical Datalogger – Configuration screen
MMA865xFC Sensor Toolbox User’s Guide, Rev. 0
Select the device's data reading resolution. A higher number of bits produces
more-precise values, but it requires more time and power.
This drop-down list enables you to select how the data is read from the device.
This drop-down list enables you to select the rate that the accelerometer collects data at.
Note: While sensor rate options above 200 Hz are included in the list (because the
Enables the device’s Low Noise Mode for more accurate readings.
Note: In Enable Low Noise mode, any g-force greater than ±4g will not be read.
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.
Fills the FIFO with data and then dumps that data to the Acceleration graph each time
that the FIFO is full.
Fills the FIFO with data and then begins feeding it out from the beginning of the FIFO.
This will cause a 32-point lag between when the data is acquired and when it is displayed
on the graph.
Set the sample number to be stored in the FIFO before the Watermark Flag is asserted.
• Selecting the 8-bit option causes the program to read only the 8 bits stored in the X, Y,
• Selecting 12 bits for the MMA8652FC reads the 8 MSB bits and the 4 bits stored in the
• Selecting 10 bits for the MMA8653FC reads the 8 MSB bits and the 2 bits stored in the
• Select ODR to display data read directly from the device’s output registers.
• Select FIFO to display data collected in the device FIFO.
and Z MSB registers.
X, Y, and Z LSB registers.
X, Y, and Z LSB registers.
To use the functions in the FIFO Configuration frame, the FIFO option must be
selected.
device is capable of operating at these rates), 200 Hz is the highest sensor rate at
which the Datalogger can function— therefore these sensor rates will not be
selectable in this application.
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.
Description
Freescale Semiconductor, Inc.