Clocking scheme
The BT module uses two clock signals (Ref_clk = 38.4 MHz and Sleepclock = 32.768 KHz) which are provided
by the WLAN-module (TCXO).
Figure 56 Clocking scheme
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.
The Bluetooth is physically integrated with the FM radio into one single module. From a functional point of
view they, however, have nothing in common.
RM-179; RM-223
System Module and User Interface
Page 6 –14 COMPANY CONFIDENTIAL Issue 1
Copyright © 2007 Nokia. All rights reserved.
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