Os motores de busca de Datasheet de Componentes eletrônicos |
|
ISL37400M-CD Folha de dados(PDF) 2 Page - Intersil Corporation |
|
ISL37400M-CD Folha de dados(HTML) 2 Page - Intersil Corporation |
2 / 6 page 2 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 Table 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 Table 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. 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. ISL37400M-EVAL |
Nº de peça semelhante - ISL37400M-CD |
|
Descrição semelhante - ISL37400M-CD |
|
|
Ligação URL |
Privacy Policy |
ALLDATASHEETPT.COM |
ALLDATASHEET é útil para você? [ DONATE ] |
Sobre Alldatasheet | Publicidade | Contato conosco | Privacy Policy | roca de Link | Lista de Fabricantes All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |