User Interface; Touch Module; Proximity Sensor And Ambient Light Sensor - Nokia Lumia 1320 Service Manual

RM-994/ RM-995/ RM-996
System Module
Figure 39 MicroUSB connector

User interface

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Touch module

This phone uses Synaptics capacitive touch solution.
The Synaptics touch module interfaces with MSM via I2C and GPIO 52 for Reset and GPIO 11 for Touch
INT.
The Synaptics touch module uses PM8038 VREG_L9_2V85 for its analogue supply and VREG_LVS2_1V8
for its digital supply.
Whenever the user touches the touch screen, the controller raises an interrupt to MSM which initiates I2C
transactions to identify the locations the user touches on the display.
Figure 40 Touch module interface

Proximity sensor and ambient light sensor

This phone uses a combined proximity and ambient light sensor called Alphamon.
Alphamon includes a digital proximity sensor, ambient light sensor and IR LED in the same package.
Alphamon is mainly targeted for adjusting the display illuminance and turning the touch display off during a
phone call if the earpiece of the phone is used.
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