Network
Processor
AT76C520
Summary
5643AS–WLAN–12/04
Features
• Routing Functions Running on ARM946ES
™
Interworking Processor with 8K Data
Cache and 8K Instruction Cache Memory
Two Ethernet 10/100T-Base MAC Units with MII Interface to External PHY
Maximum Sustainable Wired Bandwidth: 200Mbs (Half Duplex) or 400 Mbs (Full
Duplex)
WLAN ARM7TDMI
™
with Direct Access to Communication Peripherals
WLAN Hardware MAC Block (WHMB) Controlled by ARM7
®
, Supports 802.11a/b/g MAC
Functions and Provides Serial or Parallel Interface to External 802.11 PHYs
Atmel Common Memory Bus Architecture (COMBA) Guarantees No Bottleneck when
All Communication Peripherals are Concurrently Used
Hardware Security Accelerators Attached to the Common Bus Offer Instantaneous
Encryption/Decryption and Authentication Support for the Following Algorithms:
– CCM/CTR/CBC Modes of Advanced Encryption Standard (AES)
– IPSEC Block Supports DES/3DES and Hash Functions (MD5, SHA-1)
–TKIP
– RC-4, WEP 64/128 Bit-Key (Part of the WHMB)
PCI Bus Interface (Master/Slave) Compliant with PCI v 2.2
SPI Master/Slave Interface, UART, and Watchdog Timer Interface
UTOPIA Level 1 or 2 Interface Supporting up to 3 PHYs
Two USB Full-speed (12 Mbps) Ports
24 GPIOs Can Be Configured to Provide Specific Functions such as UART Interface
wWith Full Modem Control Signaling or 8-bit SRAM/ Flash Interface
32-bit SDRAM Interface
32-bit SRAM Interface
1.8 Volt Core Voltage Supply
3.3 Volt I/O Voltage Supply
324-pin BGA package
Network Processor Interfaces
AT76C520
802.11
(a/g/b)
PHY
ETH
PHY
PCMCIA
Host
SRAM/
Flash
SDRAM
UART Connection
SPI Connection
GPIOs
PCI/Cardbus
Master/Slave
Utopia
L1/2
USB
(Host)
Note: This is a summary document. A complete document is
available under NDA. For more information, please contact
your local Atmel sales office.