Electronic Components Datasheet Search |
|
ISL36356A-APDK Datasheet(PDF) 3 Page - Intersil Corporation |
|
ISL36356A-APDK Datasheet(HTML) 3 Page - Intersil Corporation |
3 / 7 page 3 Functional Overview The WLAN Access Point is designed to operate in the 2.4GHz ISM frequency band, channels 1 to 11, as specified by the FCC in the USA. The AP 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 ISL36356A-APDK for operation. The Intersil PRISM II Chip Set allows for high level integration; providing reduced size, increased throughput, improved radio performance and faster time to market. The WLAN Access Point implements Direct Sequence Spread Spectrum DSSS technology that provides superior noise and signal jamming immunity; including less severe impact from unintentional radiators such as microwave ovens. By using an Access Point, the wireless LAN can be set up to allow an even greater number of users to interconnect, and to increase the coverage area. The wireless LAN can be easily connected into an existing wired LAN, allowing for easy expansion of the service. The ISL3856 Media Access Controller (MAC) Protocol Handler The ISL3856 ARM940 based MAC Processor and the MAC Virtual Coprocessor (MVC) firmware are responsible for running the IEEE802.11 protocol in the WLAN AP. The MVC acts as a software emulated coprocessor to the ARM940 and runs completely separated from the operating system. It provides an abstraction layer of the underlying hardware to the operating system via a well-defined interface. The MVC supports the following 802.11 functions: • 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) • MAC Level Acknowledgments (Media Access Control) • Re-Transmission of Unacknowledged Frames • Duplicate Detection and Rejection • Broadcast and Multicast Frames • Fragmentation and Re-Assembly • Supports clients Power save mode • Timestamp Synchronization • DCF (Distributed Coordination Function) The Linux Operating System The ARM940 based MAC processor hosts a complete Open Source Linux operating system, offering a flexible and extensible platform for feature development. Due to the large availability of different Linux based applications in the Open Source community, it is easy to add new features to the AP, reducing time to market. A special embedded version of the Linux operating system, uClinux, is running on the ISL3856. It is tailored to run on the ARM940 processor and optimized for size. The uClinux Application Programmers Interface (API) is the same as the standard Linux API. The ISL36356A platform offers the following basic functions: • DHCP client/server • Configuration via Web Interface and SNMP • Simple and Failsafe Firmware Upgrade via Web Interface • Wi-Fi Protected Access (WPA) •802.1x Security • Wireless Distribution System • Routing, NAPT and firewall support • PPPoE • VPN Passthrough (PPTP) • 802.1d Spanning Tree Protocol (STP) Adding features to the development platform can be done by taking applications that are available in the Open Source community and port them to the platform. Porting documentation is available to assist in this task. Applications can also be made from scratch, so they can be kept closed source. The table below lists the resources that are available for adding new applications to the basic design. In normal operation, approximately 50% of the processor cycles of the ARM940 are consumed by the MVC. The remaining capacity is available for Linux and the applications. Because all applications are stored in Flash in a compressed format, the available Flash is calculated for both compressed and uncompressed files. For starting development on the Linux based platform, a complete development environment is shipped with the product, including documentation describing the setup of a development system. The complete hardware and software of the system are pretested which ensures a stable development platform. TABLE 2. AVAILABLE RESOURCES MEMORY CONFIGURATION AVAILABLE RAM AVAILABLE FLASH (COMPRESSED / UNCOMPRESSED) 2Mbyte Flash 8Mbyte RAM ~1.2Mbyte ~16kbyte / 32kbyte 4Mbyte Flash 16Mbyte RAM ~9.2Mbyte ~2.0Mbyte / 4.0Mbyte ISL36356A-APDK |
Similar Part No. - ISL36356A-APDK |
|
Similar Description - ISL36356A-APDK |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |