Preliminary Data Sheet
6/30/09
BCM4325
Section 1: BCM4325 Overview
OVERVIEW
The Broadcom® BCM4325 single-chip device provides the highest level of integration for a mobile or handheld wireless
system, with integrated IEEE 802.11™ a/b/g (MAC/baseband/radio), Bluetooth® 3.0 + HS, and an FM receiver. Designed to
address the needs of highly mobile devices that require minimal power consumption and board area, the BCM4325 provides
a compact ultra-small form-factor solution with minimal external components. This solution drives down the costs for mass
volumes, while allowing for flexibility in size, form, and function of handheld devices. It is targeted at addressing the needs
of highly mobile devices that require minimal power consumption and reliable operation.
Figure 2 shows the interconnects for the major physical blocks in the BCM4325 and associated external interfaces, which
are described in greater detail in subsequent sections of this document.
BCM4325
SW Reg.
LDO
FM Radio
Radio Control
Common Logic Block (CLB)
Antenna
Ext. PA Control
RF Switch Control
Regulator Control
Clock Control
LPO
Sleep Clock
Xtal
FM Demod, MDX,
RDX Decode
Enhanced
Ext/Shared
Coexistence Control
LNA Control
Xtal OSC.
POR
Analog Stereo
DACs
POR
Bluetooth
UART
BT-PLL
Wireless LAN
Dig I/O
Dbg-UART
BB-PLL
PCM, BSC*, I2S
ARM7TDMI
RAM
ROM
PMU Control
ARM7TDMI
SDIO Dev
SDIO/SPI
SDROM IF
WDog timer
OTP
SROM IF
JTAG
Intr Ctrl
Addr Decoder
Bus Arbiter
GPIO
GPIO
UART
JTAG
RAM (384 KB)
ROM (80 KB)
PMU Ctrl
AHB2EBI
DMA
UART
JTAG
BT clk/Hopper
RX/TX
802.11 abg
AHB2APB
LCU
MAC
APU
PHY
Blue RF IF
WDog timer
Remap/Pause
GPIO
Radio
Dig I/O
2.4 GHz
Shared LNA
5 GHz
Modem
Radio
SW Timer
PA
(Int)
PA
(Int)
TX
* BSC (Broadcom Serial Control) is I2C-compatible.
BPF
Figure 2: BCM4325 Block Diagram
Broadcom Corporation
Document 4325-DS04-R
BCM4325 Overview
Page 1
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