Preliminary Data Sheet
6/30/09
BCM4325
TABLE OF CONTENTS
Section 1: BCM4325 Overview............................................................................................1
Overview ....................................................................................................................................................... 1
Mobile Phone Usage Model......................................................................................................................... 2
Section 2: On-Chip Power Supplies and Reset.................................................................3
Power Supply Topology .............................................................................................................................. 4
Reset Circuits............................................................................................................................................... 5
Section 3: Frequency References......................................................................................6
Crystal Interface and Clock Generation..................................................................................................... 6
Crystal Oscillator ......................................................................................................................................... 7
External Frequency Reference ................................................................................................................... 7
Frequency Selection.................................................................................................................................... 8
Frequency Trimming.................................................................................................................................... 8
LPO Clock Interface..................................................................................................................................... 9
Section 4: Bluetooth + FM Subsystem Overview ...........................................................10
Features ...................................................................................................................................................... 11
Bluetooth Features................................................................................................................................ 11
FM Radio Features ............................................................................................................................... 12
Bluetooth Radio ......................................................................................................................................... 12
Transmit ................................................................................................................................................ 12
Digital Modulator............................................................................................................................ 12
Power Amplifier.............................................................................................................................. 13
Receive................................................................................................................................................. 13
Digital Demodulator and Bit Synchronizer ..................................................................................... 13
Receiver Signal Strength Indicator ................................................................................................ 13
Local Oscillator Generation................................................................................................................... 13
Calibration............................................................................................................................................. 13
Section 5: Bluetooth Baseband Core...............................................................................14
Bluetooth 2.1 and 3.0 Features ................................................................................................................. 14
Frequency Hopping Generator ................................................................................................................. 14
Link Control Layer ..................................................................................................................................... 14
Broadcom Corporation
Document 4325-DS04-R
Page vii
CYPRESS [ CYPRESS ]
