AT76C502A ATMEL Corporation, AT76C502A Datasheet

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AT76C502A

Manufacturer Part Number
AT76C502A
Description
Manufacturer
ATMEL Corporation
Datasheet

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Features
Block Diagram
Wireless Interface Following the IEEE 802.11b Standard
Wireless LAN MAC Unit with ARM7TDMI
Integrated 128-byte Transmit and 128-byte Receive FIFOs for Wireless MAC Layer
Functions
16-bit PCMCIA Bus 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
Enciphering/Deciphering of Wireless Data On-the-fly by the Implementation of the
Encryption/Decryption Code Ensures Maximum Privacy of Data
The Integrated Physical Attachment Interface (PAI) Fully Supports Direct-sequence
Spread Spectrum and Frequency-hopping Spread Spectrum (2 Mbps) Physical-layer
Interfaces
The WLAN and Inter-networking Functions can be Changed and Updated Easily to New
Requirements Since They are Implemented in Microcode
Supports 11 Mbps Rates with Automatic Fallback to 5.5, 2 and 1 Mbps
144-lead TQFP Package
Low-voltage 3.3V Operation
Internal ROM Contains Hardwired CIS Information for Automatic Configuration when
Card is Inserted in the PCMCIA Slot or Reads Custom CIS Information from SPI
Memory
Offers SPI interface and 3 GPIO Pins
AT76C502A Offers the Option to Download the Whole Code from SPI DataFlash
Option to Eliminate Flash by Downloading the Program from the Mass Storage Device
Interface
External
Memory
Memory
Internal
PCMCIA Interface
Wireless Physical
®
Interface (PAI)
RISC Processor
Attachment
ARM7TDMI
Controller
Decoder/
Interrupt
Timers
Arbiter/
Bridge
Note: This is a summary document. A complete document is avail-
able under NDA. For more information, please contact your local
Atmel sales office.
WEP
®
or an
11-megabit
WLAN Media
Access
Controller
(MAC)
AT76C502A
Summary
1948DS–WLAN–09/03

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AT76C502A Summary of contents

Page 1

... Card is Inserted in the PCMCIA Slot or Reads Custom CIS Information from SPI Memory • Offers SPI interface and 3 GPIO Pins • AT76C502A Offers the Option to Download the Whole Code from SPI DataFlash Option to Eliminate Flash by Downloading the Program from the Mass Storage Device Block Diagram PCMCIA Interface External ...

Page 2

... IEEE 802.11b standard). AT76C502A provides a glueless interface con- forming to PC Card 95 and can control a variety of physical interfaces. The AT76C502A chip contains a PCMCIA bus interface, a MAC control unit and a phys- ical attachment interface (PAI). The PAI supports direct-sequence spread spectrum and frequency-hopping spread spectrum (2 Mbps) physical interfaces, providing flexibility to end users ...

Page 3

... Fax: (81) 3-3523-7581 Disclaimer: Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein ...

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