Freescale Semiconductor MMA8652FC, User Manual, Page: 43 / 65

MMA865xFC Sensor Toolbox User’s Guide, Rev. 0
Freescale Semiconductor, Inc. 43
4.10.2 Main screen
Table 13. Full-System Evaluation – Main screen
Screen Frame
Element or
screen group
Element or
description
Description
• To display data in the Real-Time Output frame, the View button must be clicked.
• To stop displaying the current readings, click the Disable button.
Real-Time Output
Acceleration
Graph
Shows the data collected and stored in the FIFO from the last shake.
The acceleration in Gs is plotted against the number of samples.
• XYZ 12-Bit
• XYZ 8-Bit
Selects the number of bits to be read from the device. A higher number of bits
produces more precise values, but requires more time and power.
• Selecting the 8-bit option causes the program to read only the 8 bits stored
in the X, Y, and Z MSB registers.
• Selecting 10 bits for the MMA8653FC reads the 8 MSB bits and the 2 bits
stored in the X, Y, and Z LSB registers.
• Selecting 12 bits for the MMA8652FC reads the 8 MSB bits and the 4 bits
stored in the X, Y, and Z LSB registers.
View Check the check box in front of the axis to display the corresponding axis data
in the graph.
XYZ data Directs the device to display the readings in g's (or counts) for the selected
axis or axes.
Start / Stop Click Start button to start the display of accelerometer data on graph.
Click Stop to stop displaying data.
Note: Ensure that the device is in Active mode for valid data output.
The Main screen contains
the following frame
groups:
•
Real-Time
Output
•
Sleep Mode
Over-Sampling
Options
•
System
Interrupt
Settings