Digital Ambient Light Sensor (Als) - Nokia RM-555 Service Manual

RM-555
System Module and User Interface
Figure 79 Display backlighting system

Digital Ambient Light Sensor (ALS)

The Digital Ambient Light Sensor (N503 on Main FPC) approximates ambient light. Ambient light level together
with CABC and user settings adjust the display and keyboard illumination brightness. The Ambient Light
Sensor is located on the upper flex.
It is connected to the I2C bus, and powered by the VOUT (2.5V) voltage.
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