AR8327-AL1A-R datasheet(1/394 Pages) ETC2

部件名	AR8327-AL1A-R

功能描述	Seven-port Gigabit Ethernet Switch

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制造商	ETC2 [List of Unclassifed Manufacturers]

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Data Sheet

Orion®, PLC4Trucks®, Powerpacket®, Spread Spectrum Carrier®, SSC®, ROCm®, Super A/G®, Super G®, Super N®, The Air is Cleaner at 5-GHz®, Total 802.11®, U-

Nav®, Wake on Wireless®, Wireless Future. Unleashed Now.®, and XSPAN®, are registered by Atheros Communications, Inc. Atheros SST™, Signal-Sustain Technology™,

Ethos™, Install N Go™, IQUE™, ROCm™, amp™, Simpli-Fi™, There is Here™, U-Map™, U-Tag™, and 5-UP™ are trademarks of Atheros Communications, Inc. The

Atheros logo is a registered trademark of Atheros Communications, Inc. All other trademarks are the property of their respective holders. Subject to change without notice.

June 2011

Version 1.0

AR8327/AR8327N Seven-port Gigabit Ethernet Switch

General Description

The AR8327 is a highly integrated seven-port

Gigabit Ethernet switch with non-blocking

switch fabric, a high-performance lookup unit

with 2048 MAC address, and a four-traffic class

Quality of Service (QoS) engine. The AR8327

has the flexibility to support various networking

applications. The AR8327 is designed for cost-

sensitive switch applications in wireless AP

routers, home gateways, and xDSL/cable

modem platforms.

The AR8327

integrates all the functions of a

high-speed Switch system, including packet

buffer, PHY transceivers, media access

controllers, address management, and a non-

blocking switch fabric into a single 0.11 um

CMOS device. It complies with 10BASE-Te,

100BASE-Tx & 1000BASE-T specifications,

including the MAC control, pause frame, and

auto-negotiation subsections, providing

compatibility with all industry-standard

Ethernet, Fast Ethernet & Gigabit Ethernet

networks.

The AR8327

device contains five full-duplex

10BASE-Te/100BASE-TX/1000BASE-T

transceivers and 10BASE-Te/100BASE-TX can

run at half duplex, each of which performs all

of the physical layer interface functions for

10BASE-Te Ethernet on Category 5 unshielded

twisted-pair (UTP) cable and 100BASE-TX

Fast/Gigabit Ethernet on Category 5 UTP

cable. The remaining 2 ports feature a standard

GMII/RGMII/MII/Serdes interface to allow

connection to a host CPU in PON/xDSL/

Cable/Wifi/Fiber routers. The media access

controllers on the AR8327 also support Jumbo

Frames which are typically used for high-

performance connections to servers because

they offer a smaller percentage of overhead on

the link for more efficiency.

MDC/MDIO or EEPROM interfaces provide

easy programming of the on-chip 802.1p QoS

and/or DiffServ/TOS. This allows switch

traffic to be given different classes of priority or

service - for example, voice traffic for IP phone

applications, video traffic for multimedia

applications, or data traffic for e-mail. Up to 4K

Virtual LANs (VLANs) can be set up via the

MDC/MDIO port for separation of different

users or groups on the network. ACL features

can reduce CPU effort for VLAN/Q.O.S/

DSCP/Forward mapping & remapping based

on layer1 to Layer4 information. 16 PPPoE

header add/removal can increase Video

quality and offload the CPU. Hardware IGMP

V1/V2/V3 is an innovation for IPTV service.

Green Power can increase energy efficiency for

no link or idle states.

The AR8327N chip supports hardware NAT

(Network Address Translation) to offload the

CPU and achieve the full wire speed when

doing NAT. The AR8327/AR8327N supports

the following modes of NAT.

1. Basic NAT: This involves IP address

translation only, not port mapping.

2. Network Address Port Translation (NAPT):

This involves the translation of both IP

addresses and port numbers. For the NAPT

mode, the AR8327/AR8327N can support

Full cone NAT, Restricted cone NAT, Port-

Restricted cone NAT and Symmetric NAT.

e AR8327/AR8327N supports the following

configurations

n 5*10/100/1000Base-T + GMII/RGMII/MII

+ 1* Serdes

n 5* 10/100/1000Base-T + 2*RGMII/MII

n 4* 10/100/1000Base-T + 1*RGMII/MII + 1*

Single RGMII PHY

AR8327/AR8327N Features

The AR8327

chip family includes a 7-port MAC

structure to support the following family of

switch chips:

n Supports 802.3az Power Management

n The AR8327N chip includes the Hardware

NAT (Network Address Translation)

function

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