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參數資料
| 型號： | ISL3871A |
| 廠商： | Intersil Corporation |
| 元件分類： | 基帶處理器 |
| 英文描述： | Wireless LAN Integrated Medium Access Controller with Baseband Processor |
| 中文描述： | 集成的無線局域網媒體訪問控制器基帶處理器 |
| 文件頁數： | 1/1頁 |
| 文件大小： | 37K |
| 代理商： | ISL3871A |
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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