intersil ISL37300P-EVAL DATA SHEET

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PRISM 2.5 11Mbps Wireless Local Area
Network PC Card

Direct Sequence Spread Spectrum Wireless Transceiver
chip set. It pro vides a complete PRISM 2.5 reference design
evaluation platform of hardware and software to system
providers or integrators requiring wireless data
communications capability and is ideal for integration into
computer platforms.

The Evaluation kit (ISL37300P-EVAL) includes two WLAN
PC cards designed to Intersil’s PRISM reference design,
Microsoft Windows® Driver, Local Area Network evaluation
software, PRISM Test Utilities (PTU) (note 2)software and
documentation to complete the evaluation. It supports the
IEEE802.11b network specification for Direct Sequence
Spread spectrum DSSS signaling, providing data rates of 1,
2, 5.5, and 11Mbps. Evaluation kit software updates are
available on the Intersil Web Site.

In addition to the evaluation kit, a complete PRISM chipset
WLAN reference design package (ISL37300P-CD) is
available. It contains all the documentation needed for
manufacturing of the PRISM 2.5 PCMCIA wireless network
card including: Cadence/Allegro Layout, Gerber files,
Concept schematic, Bill of Materials, assembly and
mechanical drawings, test plan, and even a copy of the
application for FCC equipment authorization. Customers
who license the reference design also receive password
access to FCC Intersil’s Premier Web site for the most
current updates on hardware and software.

TM

Data Sheet December 2001

The Intersil ISL37300P WLAN PC­Card (note 1) is a complete wireless
high speed Network Interface Card
(NIC) utilizing the Intersil PRISM® 2.5

ISL37300P-EVAL

FN8026.1

Features

• Certified Under Part 15 to Operate in 2.4GHz ISM Band

• Support for 11, 5.5, 2 and 1Mbps Data Rates

• Supports the lEEE802.11 Direct Sequence Specification

•Driver Supports Microsoft Windows 95, 98, 98SE, 2000,
NT and ME

• Supports Dual Diversity Antennas

• Advanced RAKE Receiver Design with Decision F eedback
Equalizer Combats Multipath Fading

• Provides Wireless Data Communications at Full Ethernet
Speed

• Designed to Fully Support PC-card Defined Mechanical
and Environmental Stress Conditions

• Intelligent Power Control, Including IEEE802.11 Power
Save Mode

• Complete Reference Design, the ISL37300P-CD is
Available to Ensure Minimum Time-to-Market

NOTES:

1. Throughout this document, all references to ‘PC card’, ‘WLAN
adapter’, ‘adapter’, or ‘card’ refer to a card assembly conforming
to the mechanical size specifications of the PC card.

2. At present, PTU supports Windows 95, 98 and 98SE. An upgrade
is in process which will add support for NT.

3. The range will vary in different operating environments due to
effects such as building construction.

Ordering Information

CARDS PER

PART NUMBER DESCRIPTION

ISL37300P-EVAL Evaluation Kit 2
ISL37300P-CD Reference Design NA

KIT

Packaging

1

Copyright © Intersil Americas Inc. 2001. All Rights Reserved PRISM® is a registered trademark of Intersil Americas Inc. PRISM and design is a trademark of Intersil Americas Inc.

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

1-888-INTERSIL or 321-724-7143

Microsoft® and Windows® are registered trademarks of Microsoft Corporation.

|

Intersil (and design) is a trademark of Intersil Americas Inc.

2

ISL37300P-EVAL

Access Points will be available from a number of suppliers,
enabling a totally wireless network solution. Typical
operating ranges are shown in Table 1.

TABLE 1. TYPICAL OPERATING RANGE (note 3 )

DATA RATE

(Mbps) INDOOR RANGE OUTDOOR RANGE

11 120 feet (37 meters) 500 feet (152 meters)

5.5 200 feet (61 meters) 800 feet (243 meters)
2 240 feet (73 meters) 1300 feet (396 meters)
1 300 feet (91 meters) 1750 feet (533 meters)

Functional Overview

The WLAN PC-Card is designed to operate in the 2.4GHz ISM
frequency band, channels 1 to 11, as specified by the FCC in
the USA. The card will also oper ate on channels 12 through 14,
where permitted by local regulatory authorities. Radio
equipment must be certified in a country prior to use. Ref er to
Table 4 for a list of countries and agencies that have approved
the ISL37300P-EV AL f or oper ation.

The Intersil PRISM Chip Set allows for high level integration
for reduced size, increased throughput, improved radio
performance and faster time to market. The WLAN PC card
implements DSSS technology providing superior noise and
signal jamming immunity including less severe impact from
unintentional radiators such as microwave ovens. The user
can connect the PC card in an ad-hoc peer to peer
networking scheme, allowing for instant network setup in any
office environment. By using an access point, the wireless
LAN can be set up to allow for a greater number of users to
interconnect, and to increase the coverage area. With a portal
(i.e. access point), the wireless LAN can be easily connected
into an existing wired LAN, allowing for easy expansion of
the service.

Compared to the PRISM II chip set, the PRISM 2.5
generation offers:

•Low-loss front end designed for maximum range

• Higher level of chip integration and less peripheral
components to reduce material costs

• Support of optional IEEE802.11 Short Preamble for
significantly increased data throughput

• Has a Type II PC card form factor

A complete Reference Design for the ISL37300P is a vailab le
to ensure minimum time-to-market. This inf ormation contains
details for manufacturing a PC card WLAN assembly,
including Gerber PC board files, a Bill of Material with
component sourcing, mechanical drawings, a detailed Radio
Description with debug directions and a test plan.

The ISL3873 Media Access Controller
(MAC) Protocol Handler

The ISL3873 MAC/Baseband Processor and its firmware are
responsible for running the IEEE802.11 protocol in the
WLAN card. This section describes the IEEE802.11 features
that are implemented.

The functions supported by the STA (station) firmware are:

• CSMA/CA (Carrier Sense Multiple Access with Collision
Avoidance) with Random Backoff

• WEP Security

• Short/Long Preamble with multirate

•RTS/CTS Handshake (Ready To Send/Clear To Send)
and NAV Management (Network Allocation Vector)

•MAC Level Acknowledgments (Media Access Control)

• Re-Transmission of Unacknowledged Frames

• Duplicate Detection and Rejection

• Broadcast and Multicast Frames

•Fragmentation and Re-Assembly

•Power Management (Planned)

• Timestamp Synchronization

• DCF (Distributed Coordination Function)

• Beacon Generation in an Ad-Hoc Network

• Probe Response Generation in an Ad-Hoc Network

Card Information Structure

The standard Intersil WLAN PC card will be supplied with
information embedded in the CIS as shown in Table 2. It
should be noted that in most systems this information is
displayed when the card is inserted. Customization of the
CIS for specific customer requirements is available upon
request, to enable customer information to be displayed
when the card is inserted.

TABLE 2. CIS EMBEDDED INFORMATION

FUNCTION NAME CONTENT

Manufacturer Intersil
Product PRISM 2.5 PCMCIA ADAPTER
Part Number ISL37300P
Revision String Eval-Rev-A
Revision # 1.0
Manufacturer ID 000B
Device ID 7300