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ISL3871A

更新时间：2025-01-16 02:20:59

品牌：INTERSIL

描述：Wireless LAN Integrated Medium Access Controller with Baseband Processor

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ISL3871A 概述

Wireless LAN Integrated Medium Access Controller with Baseband Processor 无线局域网集成的媒体访问控制器，基带处理器

ISL3871A 数据手册

通过下载ISL3871A数据手册来全面了解它。这个PDF文档包含了所有必要的细节，如产品概述、功能特性、引脚定义、引脚排列图等信息。

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ISL3871A

Data Sheet

April 2002

FN8034

Wireless LAN Integrated Medium Access

Controller with Baseband Processor

Features

• USB host interface supports USB V1.1 at 12Mbps.

The Intersil ISL3871A Wireless LAN

Integrated Medium Access Controller

with Integrated Baseband Processor

• New Start up modes allow the PCMCIA card information

structure to be initialized from a serial EEPROM. This

allows firmware to be downloaded from the host,

eliminating the parallel flash memory device

is part of the PRISM® 2.4GHz radio chipset. The ISL3871A

directly interfaces with the Intersil’s Zero-IF

QMODEM(ISL3684). Adding Intersil’s Power Amp (ISL3984)

offers the designer a complete end-to-end WLAN chipset

solution. Protocol and PHY support are implemented in

firmware, thus supporting customization of the WLAN

solution.

• Firmware can be loaded from serial flash memory

• Zero glue connection to 16-bit wide sram devices

• Low-frequency crystal oscillator to maintain time and allow

baseband clock source to power off during sleep mode

• Improved performance of internal WEP engine

• Improvements to debug mode support tracing execution

from on chip memory

Firmware implements the full IEEE 802.11 Wireless LAN

MAC protocol. It supports BSS and IBSS operation under

DCF, and operation under the optional point coordination

function (PCF). Low level protocol functions such as

RTS/CTS generation and acknowledgment, fragmentation

and de-fragmentation, and automatic beacon monitoring are

handed without host intervention. Active scanning is

performed autonomously once initiated by host command.

Host interface command and status handshakes allow

concurrent operations from multi-threaded I/O drivers.

Additional firmware functions specific to access point

applications are also available.

• Programmable MBUS cycle extension allows accessing of

slow memory devices without slowing the clock

• Complete DSSS baseband processor

• RAKE receiver with decision feedback equalizer

• Processing gain. . . . . . . . . . . . . . . . . . . . . FCC compliant

• Programmable data rate . . . . . . . . . 1, 2, 5.5, and 11Mbps

• Available in two packages:

- Ultra small BGA package. . . . . . . . . . . . . . . 14 x 14mm

- Large LQFP flat pack for easy board layout

• Modulation methods . . . . . . . .DBPSK, DQPSK, and CCK

• Supports full or half duplex operations

• On-chip A/D and D/A converters for I/Q data , AGC, and

adaptive power control

The ISL3871A has on-board A/D’s and D/A for analog I and

Q inputs and outputs, for which the ISL3684 Zero-IF

QMODEM is recommended. Differential phase shift keying

modulation schemes DBPSK and DQPSK, with data

scrambling capability, are available along with

• Targeted for multipath delay spreads 100ns at 11Mbps,

250ns at 5.5Mbps

• Supports short preamble and antenna diversity

Complementary Code Keying to provide a variety of data

rates. Both Receive and Transmit AGC functions with 7-bit

AGC control obtain maximum performance in the analog

portions of the transceiver.

Applications

• PC Card Wireless LAN Adapters

• USB Wireless LAN Adapters

• PCN / Wireless PBX / Wireless Local Loop

Built-in flexibility allows the ISL3871A to be configured

through a general purpose control bus, for a range of

applications. The ISL3871A is housed in either a thin plastic

BGA package or a TQFP flat pack suitable for PCMCIA

board applications.

• High Data Rate Wireless LAN Systems Targeting IEEE

802.11b Standard

• Wireless LAN Access Points and Bridge Products

• Spread Spectrum WLAN RF Modems

• TDMA or CSMA Packet Protocol Radios

• ISA, ISA PnP WLAN Cards

The ISL3871A is designed to provide maximum

performance with minimum power consumption. External pin

layout is organized to provide optimal PC board layout to all

user interfaces including PCMCIA and USB.

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.

PRISM® is a registered trademark of Intersil Americas Inc. PRISM and design is a trademark of Intersil Americas Inc.

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