AT76C505 datasheet pdf

1 Note: This is a summary datasheet. A complete document is available under NDA. For more information, please contact your local Atmel sales office. 2364DS–WLAN–07/03 Features •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 ® RISC Processor •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 Block Diagram Timers External Memory Boot ROM Interface Internal Memory (SRAM) Common Memory Interface Controller ARM7TDMI Decoder/ Arbiter/ Bridge Interrupt Controller SPI Interface WEP 802.11b Baseband MAC Support Unit (MSU) USB Interface 802.11b Media Access Controller (MAC) and Baseband with USB Interface AT 7 6 C 5 0 5 Summary

Features

• •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
• •Delivers Standard Wireless Networking to Any Host that Supports a Full-speed
• •The On-chip Boot-ROM Implements the Device Upgrade Protocol (DFU) Spec Making
• •Support of an External Serial EEPROM for Configuration Settings
• •Glueless SRAM Interface for All MAC Operations, Supporting Up to 1M Byte of
• •Integrated 6K x 32-bit Internal SRAM, Used for Fast Program Code Execution and
• •Glueless Flash Memory Interface, Supporting Up to 1M Byte of Nonvolatile Memory for
• •Wired Equivalency Privacy (WEP) in Hardware Supporting 64-bit and 128-bit
• •Hardware Implementation of Time Critical MAC Functions by the MAC Support Unit
• •The WLAN and Inter-networking Functions Can Be Changed and Updated Easily to
• •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
• 802.11b
• 802.11b