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Section 1 About WL1100B-AP Access Point
Introduction
The WL1100B-AP (11 Mbps WLAN Access Point) is a long-range, high performance LAN product,
which provides Access Point services to a 2,4 GHz RF network and bridges to an Ethernet backbone. The
design of this product is based on AT76C510 (bridge-on-a-chip) module, a highly integrated ASIC designed
to combine legacy LANs with wireless LANs. AT76C510 performs all the necessary inter-networking and
bridging functions. It receives data from both networks, stores them locally for further processing, installs and
maintains connections and transmits the packets to the proper destination. Furthermore, AT76C510 interfaces
three more modules, the Ethernet PHY, the wireless PHY and the RAM modules, for allowing compact
system implementation and flexibility for supporting almost all the possible physical interfaces.
1-1 Features
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Intersil PRISMI, PRISMII Direct Sequence Spread Spectrum (DSSS) radio chip set, able to
communicate also with other DSSS radios
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Supports 11 Mbps rates with automatic fallback to 5.5, 2 and 1 Mbps
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WEP encryption/decryption is accomplished on the fly
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Ethernet MAC supports MII interface and 10/100Mbit speeds
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Hardware modules for Packet Filtering and statistics gathering
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SRAM, Flash interface for data buffering and program storage, supporting up to 16 MB of memory
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Integrated 2 x 6K x 32 bit internal SRAM modules for fast 32-bit program execution and temporary
storage of data
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128-pin PQFP, TQFP
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JTAG Boundary Scan (IEEE 1149.1) test access port for board-level production test
1-2 Firmware functionality
The firmware functionality of the bridge supports:
1. Distributed Coordination Function (DCF)
CSMA/CA
Backoff procedure
NAV management
ACK procedure
