AR9271 データシートの表示（PDF） - QUALCOMM Incorporated

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AR9271

Highly integrated single-chip USB with 802.11n support

QUALCOMM Incorporated 

AR9271

Highly integrated single-chip USB

with 802.11n support

Qualcomm offers the

industry's most innovative

and complete portfolio of

802.11n wireless LAN chip solutions.

Building on the company’s Wi-Fi

leadership – with enhanced performance,

higher integration, smaller formfactors

and lower overall cost – to meet the

needs of today’s 802.11n market.

Solution Highlights

£ Single-chip, 802.11n compliant wireless LAN client solution with

integrated both a CPU and memory to run more of the wireless

LAN function on-chip

£ Intergrated RF front end with high-output PA, LNA, Rx/Tx switch

£ Internal diversity switch which selects antenna 1 or 2 for

baseband signal processing

£ Enables PHY rate of up to 150 Mbps

£ Based on fourth-generation 802.11n compliant technology

£ Compliant with IEEE 802.11b, 802.11g, 802.11d, 802.11e, 802.11i,

and 802.11n

£ Lead-free RoHS compliant

Qualcomm Align® Technology Overview

WLAN is ubiquitous in notebooks and netbooks, a standard feature

especially in portable computing platforms, meeting user demand

for mobile wireless connectivity. Many computers are shipping with

11n technology, and a large proportion of value-class notebooks and

netbooks now feature Qualcomm’s popular 1-stream 11n technology,

Align. Bluetooth, the most popular personal area network technology,

is contained in nearly half of netbooks shipping today, enabling

wireless connectivity with peripherals such as keyboards, mice and

headsets. As a result, many portable computing platforms contain

both WLAN and Bluetooth capabilities. However, these two wireless

technologies are commonly located on separate PCIe cards within

the same system, posing size and cost design challenges.

Product Overview

The Qualcomm AR9271 single-chip USB solution provides enhanced

Wi-Fi performance and value for home gateways, set-top boxes,

gaming consoles, printers and a variety of other embedded wireless

products. The solution can also be integrated into wireless USB

adapters for notebooks and desktops, to enable simple, low-cost

performance upgrades on legacy PCs. The AR9271 WLAN USB single

chip features a new architecture that integrates both a CPU and

memory to run more of the wireless LAN function on-chip. Unlike

competitive 11g and 11n USB solutions, the Qualcomm integrated

CPU offloads the wireless processing overhead from the host

appliance. This design breakthrough enables consumer electronics

devices with host processors not originally intended to support

wireless functions, to now offer robust Wi-Fi performance. With the

AR9271’s innovative host offload capability, the WLAN operates

autonomously and enables the main device application to operate

seamlessly.

AR9271 Architecture

2.4 GHz

40 MHz

Crystal

LNA

Combiner

RF

Switch

RX Radio

ADC Baseband

MAC

PA

TX Radio

DAC

Frequency

Synthesizers

Bias/Control

Memory Memory Control

CPU

USB

DMA

GPIOs

Serial

EEPROM

USB 2.0

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