ISL37300P-EVAL Datasheet, PDF (2/6 Pages) Intersil Corporation – PRISM 2.5 11Mbps Wireless Local Area Network PC Card

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 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
Table 4 for a list of countries and agencies that have approved
the ISL37300P-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 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 available
to ensure minimum time-to-market. This information 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
2