AR9271 データシートの表示（PDF） - Unspecified

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AR9271

Single-Chip 1x1 MAC/BB/Radio/PA/LNA with USB Interface for 802.11n 2.4 GHz WLANs

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Data Sheet

November 2011

AR9271 Single-Chip 1x1 MAC/BB/Radio/PA/LNA with USB

Interface for 802.11n 2.4 GHz WLANs

General Description

The Atheros AR9271 is a highly integrated single-

chip solution for 2.4 GHz 802.11n-ready wireless

local area networks (WLANs) that enables a high-

performance 1x1 configuration for wireless station

applications demanding robust link quality and

maximum throughput and range. The AR9271

integrates a multi-protocol MAC, baseband

processor, analog-to-digital and digital-to-analog

(ADC/DAC) converters, 1x1 radio transceiver, RF

switch, and USB interface in an all-CMOS device

for low power and small form factor applications.

The AR9271 implements half-duplex OFDM,

CCK, and DSSS baseband processing, supporting

72.2 Mbps for 20 MHz and 150 Mbps for 40 MHz

channel and IEEE 802.11b/g data rates. Other

features include signal detection, automatic gain

control, frequency offset estimation, symbol

timing, and channel estimation. The AR9271 MAC

supports the 802.11 wireless MAC protocol,

802.11i security, receive and transmit filtering,

error recovery, and quality of service (QoS).

The AR9271 supports one transmit traffic stream

and one receive traffic stream using one

integrated Tx chain and one receive chain for high

throughput and range performance. The Tx chain

combines baseband in-phase (I) and quadrature

(Q) signals, converts them to the desired

frequency, and drives the RF signal to the

antenna. The frequency synthesizer supports

frequencies defined by IEEE 802.11b/g/n

specifications.

The AR9271 supports frame data transfer to and

from the host using a USB interface that provides

interrupt generation/reporting, power save, and

status reporting. Other external interfaces include

serial EEPROM and GPIOs. The AR9271 is

interoperable with standard legacy 802.11b/g

devices.

Features

■ All-CMOS solution interoperable with IEEE

802.11b/g/n WLANs

■ 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

■ Supports optional external LNA, PA

■ 2.4 GHz WLAN MAC/BB processing

■ BPSK, QPSK, 16 QAM, 64 QAM, DBPSK,

DQPSK, and CCK modulation schemes

■ Supports 72.2 Mbps for 20 MHz and 150 Mbps

for 40 MHz channel operations

■ Wireless multimedia enhancements quality of

service support (QoS)

■ 802.11e-compatible bursting

■ Support for IEEE 802.11e and IEEE 802.11i

standards

■ WEP, TKIP, and AES hardware encryption

■ Reduced (short) guard interval

■ Frame aggregation

■ Block ACK

■ USB 2.0 interface

■ Supports the access of a serial peripheral (SPI)

compatible Flash memory, which includes

booting from an SPI Flash and auto-

installation

■ IEEE 1149.1 standard test access port and

boundary scan architecture supported

■ 68-pin, 8 mm x 8 mm LPCC package

AR9271 System Block Diagram

© 2010-11 by Atheros Communications, Inc. All rights reserved. Atheros®, Atheros Driven®, Align®, Atheros XR®, Driving the Wireless Future®, Intellon®, No New

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U-Nav®, Wake on Wireless®, Wireless Future. Unleashed Now.®, and XSPAN®, are registered by Atheros Communications, Inc. Atheros SST™, Signal-Sustain

Technology™, Ethos™, Install N Go™, IQUE™, ROCm™, amp™, Simpli-Fi™, There is Here™, U-Map™, U-Tag™, and 5-UP™ are trademarks of Atheros Communications,

Inc. The Atheros logo is a registered trademark of Atheros Communications, Inc. All other trademarks are the property of their respective holders. Subject to change without

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