User's Manual

Introduction
1-2
–16-bit PCMCIA bus interface
–Glueless SRAM interface for all MAC operations, supporting up to 16 MB of external
memory
–Integrated 6Kx32 bit internal SRAM, used for fast program code execution and
temporary storage of data
–Glueless Flash memory interface, supporting up to 16 MB on non volatile memory
for permanent storage of program code
–Enciphering/deciphering of wireless data by the implementation of the WEP
algorithm
–Supports 11, 5.5, 2, and 1 Mbps rates
1.4 Firmware
Features
The IEEE 802.11b firmware implementation for the AT76C503A-EK supports:
–Distributed Coordination Function
CSMA/CA
Backoff Procedure
NAV Management
ACK Procedure
Retransmission of unacknowledged frames
–RTS/CTS Handshake
–Duplicate Detection and Recovery
–Beacon Generation (ad-hoc mode)
–Probe Response (ad-hoc mode)
–Fragmentation and Reassembly
–Wired Equivalent Privacy Algorithm (WEP-40 bits, 128 bits)
–Auto Rate Fallback
–TSF synchronization
–Short Preamble
1.5 Driver Features
The drivers for the AT76C502-EK support:
–Roaming
–Preferred AP
–Dynamic configuration
–Site Survey
–Preamble Type detection
–Firmware Upgrade
–Authentication Algorithm (Open System, Shared Key)