Bluetooth Interface; Proximity Sensor - Nokia 300 Service Manual

Vibra
Vibra is located on the PWB and is connected to VibraN and VibraP lines of the EM ASIC.

Bluetooth interface

Bluetooth provides a fully digital link for communication between a master unit (the phone) and one or more
slave units (e.g. a wireless headset). Data and control interface for a low power RF module is provided by the
BTHFM module.

Proximity sensor

The proximity sensor is used to turn off the touch input, when the phone is against user's ear during call.
This prevents accidental touch signals that could happen when, for example, user's cheek touches the phone.
The main parts of the proximity sensor subsystem are:
• Proximity sensor
• Proximity boot (mechanical part)
Features
The Proximity sensor has following features:
• 2.8V
• 1.8V compatible IOs
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Figure 20 Bluetooth interface
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