intersil ISL37400M-EVAL DATA SHEET

查询ISL37400M-CD供应商

PRISM

Network miniPCI

Sequence Spread Spectrum (DSSS) Wireless Transceiver chip set. It provides 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.

Evaluation kits include a WLAN miniPCI and a WLAN PCMCIA designed to Intersil’s PRISM reference design, Microsoft® Windows® driver, LAN evaluation software, PRISM Transmitter Test Utilities (PTTU) software (Note 3) and documentation to get your evaluation started quickly. It supports the IEEE802.11 network speciﬁcation for DSSS signaling, providing data rates of 1, 2, 5.5 and 11Mbps. Access points are available from a number of suppliers, enabling a total wireless network solution. Typical operating ranges are shown in Table 1.

A complete PRISM chipset WLAN reference design package (ISL37400M-CD) is also available. The reference design package contains all the documentation needed for the manufacture of the PRISM 2.5 miniPCI WLAN card including Cadence/Allegro Layout, Gerber ﬁles, Concept Schematic, Bill of Materials, Assembly and Mechanical Drawings, Test Plan, and a copy of the application for FCC equipment authorization. Customers who license the reference design also receive password access to Intersil’s Premier Web Site for up-to-the-minute updates on hardware and software.

Data Sheet December 2001

2.5 11Mbps Wireless Local Area

The Intersil ISL37400M WLAN miniPCI (Note 1) is a complete wireless high speed network interface card (NIC) utilizing the Intersil PRISM 2.5 Direct

ISL37400M-EVAL

FN8022.3

Features

• FCC-certiﬁed under Part 15 to operate in 2.4GHz ISM band

• Support for 11, 5.5, 2 and 1 Mbps data rates

• Supports the lEEE 802.11 direct sequence speciﬁcation

•Driver supports Microsoft Windows 95, 98, 98SE, 2000, CE, ME and Microsoft Windows NT®4

• Supports dual diversity antennas

• Advanced RAKE receiver design with Decision Feedback Equalizer

• Provides wireless data communications at full ethernet speed

• Designed to fully support miniPCI Type 3A-deﬁned mechanical and environmental stress conditions

• Intelligent power control, including IEEE802.11 power save mode

• Complete reference design; the ISL37400M-CD is available to ensure minimum time-to-market

Ordering Information

PART NUMBER DESCRIPTION CARDS/SET

ISL37400M-EVAL WLAN Evaluation Kit 1 miniPCI

1 PCMCIA

ISL37400M-CD Reference Design n/a

PRISM® is a registered trademark of Intersil Americas Inc.

PRISM and design is a trademark of Intersil Americas Inc.

Microsoft® Windows® and Microsoft® Windows NT® are

registered trademarks of Microsoft Corporation.

Packaging

is a trademark of Intersil Americas Inc. Microsoft®, Windows® and Windows NT® are registered trademarks of Microsoft Corporation.

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 trademark of Intersil Americas Inc.

ISL37400M-EVAL

TABLE 1. TYPICAL OPERATING RANGE (Notes 2, 4)

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)

NOTES:

1. Throughout this document, all references to ‘miniPCI’, ‘WLAN adapter’, ‘adapter’, or ‘card’ refer to a card assembly conforming to the mechanical size specifications of the miniPCI Type 3A.

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

3. At present, PTTU supports Windows 95, 98, NT, 2000 and ME

4. Data taken using custom proprietary antennas in a custom proprietary laptop computer.

Functional Overview

The WLAN miniPCI 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 operate on channels 12 through 14, where permitted by local regulatory authorities. Radio equipment must be certiﬁed in a country prior to use. Refer to Ta b le 4 for a list of countries and agencies that have approved the ISL37400M-EVAL for operation.

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 miniPCI 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 miniPCI 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, reducing material costs

• Support of optional IEEE802.11 Short Preamble for signiﬁcantly increased data throughput with room for additional user-deﬁned functions

• Has a miniPCI interface/Type 3A form factor

A complete reference design for the ISL37400M is available to ensure minimum time-to-market. This information contains details for manufacturing a miniPCI WLAN assembly, including Gerber PC board ﬁles, an accurate bill of material with component sourcing and complete mechanical drawings and a complete radio description and test plan.

Related Literature

•Tech Brief TB337, Intersil Corporation, A Brief Tutorial on

Spread Spectrum and Packet Radio [1].

•Tech Brief TB382, Intersil Corporation, Measurement of

WLAN Receiver Sensitivity [2].

• Application Note AN9850, Intersil Corporation,

Complementary Code Keying Made Simple [3].

• Application Note AN9829, Intersil Corporation, Brief

Tutorial on IEEE802.11 Wireless LANs [4].

• Application Note AN9820, Intersil Corporation, A

Condensed Review of Spread Spectrum Techniques for ISM Band Systems [5].

The ISL3874 Media Access Controller (MAC) Protocol Handler

The ISL3874 MAC/Baseband Processor and its ﬁrmware are responsible for running the IEEE802.11 protocol in the WLAN card. This section describes the features of IEEE802.11 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

• Retransmission of unacknowledged frames

• Duplicate detection and rejection

• Broadcast and multicast frames

•Fragmentation and re-assembly

•Power management (planned)

• Timestamp synchronization

• DCF (distributed coordination function)

• PCF (point coordination function)

• Beacon generation in an ad-hoc network

• Probe response generation in an ad-hoc network

Card Information Structure

The standard Intersil WLAN miniPCI will be supplied with information embedded in the Plug and Play (PnP) shown in Ta ble 2. It should be noted that in most systems this information is displayed when the card is inserted. Customization of the PnP for speciﬁc customer requirements is available upon request, to enable customer information to be displayed when the card is inserted.

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