AT76C505 ATMEL Corporation, AT76C505 Datasheet

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AT76C505

Manufacturer Part Number
AT76C505
Description
Manufacturer
ATMEL Corporation
Datasheet

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Features
Block Diagram
IEEE 802.11b MAC and Baseband for Supporting Standard Rates Up to 11 Mbps
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
Delivers Standard Wireless Networking to Any Host that Supports a Full-speed
(12 Mbps) USB Interface
The On-chip Boot-ROM Implements the Device Upgrade Protocol (DFU) Spec Making
the AT76C505 Ideal for Low-cost Terminal Adaptors without Requiring External
Program Flash Since the Host Driver Downloads the Code During the Start-up Phase
Support of an External Serial EEPROM for Configuration Settings
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 Equivalency Privacy (WEP) in Hardware Supporting 64-bit and 128-bit
Encryption
Hardware Implementation of Time Critical MAC Functions by the MAC Support Unit
(MSU) Guarantees Maximum Robustness
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
128-ball CABGA Package
Low-voltage 3.3V Operation
SPI Interface and 8 GPIO Pins
Baseband Supports Antenna Diversity Algorithm
Baseband Supports Japan Filter
Baseband Supports Differential or Single-ended I- and Q-Baseband Signals
Integrated 802.11b Baseband Processor
Boot ROM
Interface
Memory
(SRAM)
External
Memory
Internal
SPI Interface
®
MAC Support
Unit (MSU)
RISC Processor
USB Interface
ARM7TDMI
Baseband
802.11b
Controller
Decoder/
Interrupt
Note: This is a summary datasheet. A complete document is available
under NDA. For more information, please contact your local Atmel sales
office.
Timers
Arbiter/
Bridge
WEP
802.11b
Media Access
Controller
(MAC) and
Baseband with
USB Interface
AT76C505
Summary
2364DS–WLAN–07/03
1

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AT76C505 Summary of contents

Page 1

... Mbps) USB Interface • The On-chip Boot-ROM Implements the Device Upgrade Protocol (DFU) Spec Making the AT76C505 Ideal for Low-cost Terminal Adaptors without Requiring External Program Flash Since the Host Driver Downloads the Code During the Start-up Phase • Support of an External Serial EEPROM for Configuration Settings • ...

Page 2

... AT76C505 USB interface can support Suspend and Resume bus condition for saving power during host idle periods. Besides the USB interface unit, the AT76C505 chip contains a WEP engine block, a MAC Support Unit (MSU), a 802.11b baseband controller, a memory controller and the ® ...

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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