鈥?/div>
Functions
Delivers Standard Wireless Networking to Any Host that Supports a Full-speed
(12 Mbps) USB Interface
Glueless SRAM Interface for All MAC Operations, Supporting up to 1M Byte of External
Memory
Integrated 6K x 32-bit Internal SRAM, Used for Fast Program Code Execution and
Temporary Storage of Data
Glueless Flash Memory Interface, Supporting up to 1M Byte of Nonvolatile Memory for
Permanent Storage of Program Code
Wired Equivalent Privacy (WEP) in Hardware Supporting 64-bit and 128-bit Encryption
The Integrated Physical Attachment Interface (PAI) Fully Supports Direct-sequence
Spread Spectrum and Frequency-hopping Spread Spectrum Physical-layer Interfaces
The WLAN and Inter-networking Functions can be Changed and Updated Easily to New
Requirements Since They are Implemented in Micro Code
Supports 11 Mbps Data Rate with Automatic Fallback to 5.5, 2 and 1 Mbps
128-lead, 14 x 14 mm TQFP Package
Low-voltage Operation (3.3V)
Internal ROM Contains Hardwired USB Control Software for Automatic Configuration
When Card is Inserted in the USB Slot
Device Firmware Upgrade is also Included in the Internal ROM for Downloading
Firmware into Internal SRAM
Offers SPI Interface and Five GPIO Pins
The Internal ROM Program Reads Two Configuration Pins that Give the
Following Information: AT76C503A Offers the Option to Download the Whole
Code from SPI Flash
Universal Serial
Bus 11-megabit
WLAN Media
Access
Controller
AT76C503A
Block Diagram
PCMCIA Interface
Timers
Summary
Common Memory
Interface Controller
External
Memory
Interface
ARM7TDMI
Decoder/
Arbiter/
Bridge
Interrupt
Controller
Wireless Physical
Attachment
Interface (PAI)
Internal
Memory
WEP
Rev. 1949BS鈥?2/01
Note: This is a summary document. A complete document is
available under NDA. For more information, please contact your
local Atmel sales office.
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