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ISL37300P-EVAL Fiches technique(PDF) 2 Page - Intersil Corporation |
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ISL37300P-EVAL Fiches technique(HTML) 2 Page - Intersil Corporation |
2 / 6 page 2 Access Points will be available from a number of suppliers, enabling a totally wireless network solution. Typical operating ranges are shown in Table 1. 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 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) 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 ISL37300P-EVAL |
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