bcm4748 Broadcom Corp., bcm4748 Datasheet - Page 2

• Manufacturer Part Number: bcm4748
• Description: Intensi-fi Xlr 2 2 Ieee 802.11n 2.4 Ghz 5 Ghz Soc
• Manufacturer: Broadcom Corp.

The Broadcom BCM4748 processor is the highest performance SoC in
the Intensi-fi XLR processor family. This device is an IEEE 802.11n-
compliant CPU/MAC/baseband/radio AP solution designed for
enterprise applications. Integrated on-chip is a powerful 533 MHz
MIPS32 74K core with four-way set associative 32 KB instruction cache,
a 32 KB two-way set associative data cache, and a 64-entry translation
lookaside buffer. Enhanced CPU memory subsystem architecture
provides increased system performance.
Using multiple in/multiple out (MIMO) signaling with IEEE 802.11n
protocol, information is sent and received over two or more antennas
simultaneously using the same frequency band, thus providing greater
range and increasing throughput while maintaining compatibility with
legacy IEEE 802.11a/b/g devices. This improved functionality is
accomplished through a combination of enhanced MAC and PHY
implementations, including spatial multiplexing modes in the transmitter
and receiver as well as advanced digital signal processing techniques to
improve receive sensitivity.
Broadcom
XLR, Accelerange™ Technology, and SecureEasySetup
Corporation and/or its affiliates in the United States, certain other countries and/or the EU. Any other
trademarks or trade names mentioned are the property of their respective owners.
BROADCOM CORPORATION
5300 California Avenue
Irvine, California 92617
© 2009 by BROADCOM CORPORATION. All rights reserved.
4748-PB00-R
Feature
Package ball count
CPU
SDRAM
Flash
Ethernet (External PHY + MII/RGMII)
PCIe™
USB 2.0 port
I
GPIO
Band
Support for up to three antennas
External LNA support
Reference design
2
S
®
, the pulse logo, Connecting everything
05/06/09
®
®
, the Connecting everything logo, Intensi-fi
®
are among the trademarks of Broadcom
O V E R V I E W
Device Features
BCM4748
570 pins
480 MHz
32-bit DDR2 up to DDR2-533
Serial or 8-bit parallel Flash
Yes
Yes
Two hosts
Multiplexed onto six parallel Flash pins
16
2.4 GHz/5 GHz
Yes
Yes, multiplexed onto eight GPIOs
BCM95474EAP
®
With its fully integrated dual-band radio transceiver, the chip
architecture supports two streams with two antennas for TCP throughput
of over 200 Mbps per radio. Switched antenna diversity operation is also
supported for three antenna configurations.
State-of-the-art security is provided by industry-standardized system
support for WPA, WPA2 (IEEE 802.11i), and hardware-accelerated
AES encryption/decryption coupled with TKIP and IEEE 802.1X
support.
Embedded hardware acceleration enables increased system performance
and significantly reduces host CPU utilization in both client and AP
configurations. The BCM4748 supports Broadcom FASTPATH
Unified Access Point (UAP) software to enable complete enterprise AP
solutions for standalone or switch-managed products.
The BCM4748 integrates two USB 2.0 EHCI host ports. The device also
includes an 8/16-bit parallel external bus interface (EBI) for Flash
memory as well as other generic parallel devices. The 16 dedicated
GPIOs are another feature of the device .
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.broadcom.com
®