PRELIMINARY DATA SHEET
BCM4325
IEEE 802.11 a/b/g MAC/Baseband/Radio Plus
Bluetooth 3.0 + HS and FM Receiver Single-Chip
Combination
GENERAL DESCRIPTION
The Broadcom® BCM4325 single-chip device provides
the highest level of integration for a mobile or handheld
wireless systems with integrated IEEE 802.11™ a/b/g
MAC/baseband/radio, Bluetooth® 3.0 + HS and a FM
radio receiver.
InConcert provides the highest possible degree of
collaboration between Bluetooth® and WLAN using a
shared 2.4 GHz antenna, along with coexistence support
for external radio technologies such as GPS, WiMax and
Ultra Wide-Band (UWB).
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 of mass volumes, while allowing for
flexibility in the size, form, and function of handheld
devices.
As a result, the overall quality of simultaneous voice,
video, and data transmission on a handheld system is
enhanced while minimizing the PCB footprint.
Designed to support flexible power supply topologies,
including operation directly from the rechargeable battery
in a mobile platform, the BCM4325 integrates a power
management unit with five LDOs and two switching
regulators.
Utilizing advanced design techniques and process
technologies to deliver low active and idle power, the
BCM4325 extends system battery life while maintaining
consistent connectivity and high throughput.
The integrated CMOS WLAN 2.4 GHz and 5 GHz power
amplifiers provide sufficient output power to meet the
needs of most WLAN devices, without the need for an
external PA. Furthermore, the integrated buck-boost
regulator allows the internal power amplifiers to operate
at optimal performance, even at low Vbatt supply
voltages. Transmit and receive baluns are also integrated.
An SDIO system interface (4b, 1b, or SPI) is provided for
WLAN and an independent, high-speed UART is
provided for the Bluetooth section.
A unique feature of the BCM4325 is its implementation of
highly sophisticated InConcert™ (IEEE 802.15.2) radio
coexistence algorithms and hardware mechanisms.
Vbatt
VIO
WL_RST_N
WLAN Host I/F
5 GHz WLAN Tx
SW
5 GHz WLAN Rx
SDIO
WL_WAKE_N1
WL_HOST_WAKE_N1
BT_RST_N
UART
I2S
2.4 GHz WLAN Tx
2.4 GHz WLAN/BT Rx
Bluetooth Tx
Bluetooth Host I/F
FM Host I/F
SW
CBF
BCM4325
PCM
BT_WAKE1
BT_HOST_WAKE1
BSC2
FM Rx
FM_IRQ1, 3
Ref Frequency
TCXO
LPO Clock
32.768 kHz
Notes: 1. Indication for optional GPIO functions.
2. BSC is Phillips® I2C-compatible.
3. For information on the FM_IRQ signal, refer to the following Broadcom documents:
BCM4325 FM_RDS Block Setup Quick Start Guide (4325-QSG100-X) and
FM Command and Control Specification (4325-AN400-X).
Figure 1: Functional Block Diagram
4325-DS04-R
6/30/09
5300 California Avenue • Irvine, CA 92617 • Phone: 949-926-5000 • Fax: 949-926-5203
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