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Freescale Semiconductor Document Number: AN4458
Application Note Rev. 0, 06/2012
© 2012 Freescale Semiconductor, Inc. All rights reserved.
Contents
Using the Xtrinsic FXOS8700CQ
Accelerometer and
Magnetometer Vector-Magnitude
Function
by: Talat Ozyagcilar
Applications Engineer
1 Introduction
This application note demonstrates the FXOS8700CQ
vector-magnitude function for both the accelerometer
and magnetometer with use-case examples. Use cases
where this application note is useful include:
Accelerometer vector-magnitude function:
• Detection of linear acceleration exceeding a
threshold
• Detection of change of tilt angle exceeding a
threshold.
Magnetometer vector-magnitude function:
• Detection of magnetic jamming.
1.1 Keywords
Vector Magnitude, Motion Detection, Tilt Detection,
Magnetic Field Strength, Linear-Acceleration Detection,
Tilt-Angle Detection, Holster, Smart Cover, Inertial,
Vector Magnitude
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Keywords. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Related Documentation. . . . . . . . . . . . . . . . . . . . . . 2
2 Vector-Magnitude Functions . . . . . . . . . . . . . . . . . . . . . . 2
2.1 Accelerometer vector-magnitude function. . . . . . . . 4
2.2 Magnetometer vector-magnitude function. . . . . . . . 8
