Bluetooth
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
module.
Figure 26 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.
Technical specifications
Main RF characteristics for GSM band phone
Parameter Unit
Cellular system EGSM850/900/1800/1900
RX frequency band EGSM850: 869- 894 MHz
EGSM900: 925- 960 MHz
GSM1800: 1805 - 1880 MHz
GSM1900: 1930 - 1990 MHz
TX frequency band GSM850: 824- 849 MHz
GSM900: 880- 915 MHz
GSM1800: 1710 - 1785 MHz
GSM1900: 1850 - 1910 MHz
RM-352; RM-354
System Module
Page 5 –18 COMPANY CONFIDENTIAL Issue 1
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