2384AS–WLAN–01/04
802.11b Media
Access
Controller
(MAC) and
Baseband with
USB Master
Capabilities
AT76C507
Summary
Features
USB Open Host Controller 1.1 Compliant
Integrates the IEEE 802.11 Physical Layer (Baseband) and the Medium Access
Controller (MAC) for Supporting Standard Rates up to 11 Mbps
Supports Antenna Diversity Algorithm, Automatic Receive Gain Control, Transmit Gain
Control, Transmit Filter for Japanese Regulatory and Differential or Single-ended I- and
Q-Baseband Signals
Integrates 160 KBytes of SRAM Organized in Five Banks of 32 KBytes Each, Offering
the Flexibility for Individually Configuring Each of Them as Program or Data Memory
Zero Wait States for Program Execution
Fast Data Transfers through DMA Channels
Low-power ARM7TDMI
®
RISC Processor
Integrates a Bootstrap ROM Supporting Firmware Uploading from a Serial DataFlash
®
Glueless Parallel Flash Memory Interface, Supporting up to 128 KBytes of Nonvolatile
Memory
Glueless External SRAM Interface for all MAC Operations, Supporting up to
128 KBytes of External Memory
Wired Equivalency Privacy (WEP) in Hardware Supporting 64-bit and 128-bit Keys
Hardware Implementation of TKIP
Hardware Implementation of AES Encryption Supporting Various Modes
(CCM/CTR/CBC)
The WLAN Functions Can Be Easily Changed or Updated to New Requirements Since
They are Implemented in Microcode
Supports 11 Mbps Rates with Automatic Fallback to 5.5, 2, and 1 Mbps
SPI Interface and 9 GPIO Pins
144-ball LFBGA Package
Low-voltage 1.8V Operation
Block Diagram
Timers
External
Memory
Boot ROM
Interface
Internal
Memory
(SRAM)
Common Memor
y
Interf
ace Controller
ARM7TDMI
Decoder/
Arbiter/
Bridge
Interrupt
Controller
SPI Interface
802.11b
Baseband
MAC Support
Unit (MSU)
USB Master
Interface
Encryption/
Decryption
Block
Note: This is a summary document. A complete document
is available under NDA. For more information, please con-
tact your local Atmel sales office.