Figure 46 Accelerometer diagram
Magnetometer
The 3D magnetometer (N1110) is connected to MSM8960 via interrupt signal GPIO 70 and I2C2 bus. Supply
voltages are VREG_S4 (1.8V) and VREG_L9 (2V8).
The magnetometer is most commonly used for pedestrian navigation when the map north is aligned with
the magnetic north. Some gaming, compass and other applications that utilize the magnetometer are also
available.
Before using the magnetometer on an application, static magnetic fields caused e.g. by speakers, vibras or
magnetized ferromagnetic metals within the phone need to be removed from the 3D data. The calibration
is done by rotating the phone for a few seconds around its all axes. In the Maps application, the status of the
magnetometer calibration is indicated by the compass color.
Figure 47 Magnetometer diagram
Gyroscope
A gyroscope is a device for measuring rotation (pitch, roll and yaw) in a three dimensional space.
The 3D gyroscope (N1120) sensor is connected to MSM8960 via two GPIOS (68 and 69) and the I2C bus. Power
is provided from VREG _S4_1V8 and VREG_L9_2V85 from the PMIC.
RM-824; RM-825; RM-826
System Module
Issue 2 NOKIA INTERNAL USE ONLY Page 6 – 21
Copyright © 2012 Nokia. All rights reserved.
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