Figure 60 Keyboard interface
Ambient light sensor (ALS) interface
Ambient light sensor information is used to control keyboard and display brightness.
•
Keyboard backlight is turned OFF, when it is not needed.
•
Display brightness is dimmed, when environment lighting is dark.
The ambient light sensor is calibrated in production and can be re-tuned in service points, though not
recommended unless calibration coefficient is lost for some reason
Figure 61 Ambient light sensor (ALS) interface
Accelerometer
The accelerometer measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic
acceleration resulting from motion or shock.
RM-424; RM-564
System Module
Issue 1
COMPANY CONFIDENTIAL
Page 6 –17
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