Figure 69 Bluetooth interface
The Bluetooth has a separate built in antenna and is powered by VBAT and the regulated voltage VIO. For
audio applications the Bluetooth has a PCM data bus. In addition a UART (universal asynchronous receiver/
transmitter) is used for data communication and controls.
FM radio
The FM radio is physically integrated with the Bluetooth into one single module. From a functional point of
view they, however, have nothing in common.
Figure 70 FM interface
The FM radio is an integrated circuit, controlled by MCU software through a serial bus interface. The wires of
the headset are used as poles of the antenna, and no other antenna is needed for FM radio reception.
In addition to the Bluetooth unit the FM radio is provided with LDO (low drop out) voltage 2V8_FM_LCD.
RM-123; RM-145
Nokia Customer Care System Module
Page 8 –20 COMPANY CONFIDENTIAL Issue 1
Copyright © 2006 Nokia. All rights reserved.
To Next Page
Loading...
