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ISL3871A Datasheet(PDF) 1 Page - Intersil Corporation

Part No. ISL3871A
Description  Wireless LAN Integrated Medium Access Controller with Baseband Processor
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL3871A Datasheet(HTML) 1 Page - Intersil Corporation

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1
®
FN8034
ISL3871A
Data Sheet
April 2002
Wireless LAN Integrated Medium Access
Controller with Baseband Processor
The Intersil ISL3871A Wireless LAN
Integrated Medium Access Controller
with Integrated Baseband Processor
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 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.
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
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.
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.
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.
Features
• USB host interface supports USB V1.1 at 12Mbps.
• 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
• 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
• 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
• Targeted for multipath delay spreads 100ns at 11Mbps,
250ns at 5.5Mbps
• Supports short preamble and antenna diversity
Applications
• PC Card Wireless LAN Adapters
• USB Wireless LAN Adapters
• PCN / Wireless PBX / Wireless Local Loop
• 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
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.
Copyright © Intersil Americas Inc. 2002. All Rights Reserved
PRISM® is a registered trademark of Intersil Americas Inc. PRISM and design is a trademark of Intersil Americas Inc.


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