ASIX ELECTRONICS CORPORATION

First Released Date: 11/07/2002

4F, NO.8, Hsin Ann Rd., Science-based Industrial Park, Hsin-Chu City, Taiwan, R.O.C.

TEL: 886-3-579-9500

FAX: 886-3-563-9799

http://www.asix.com.tw

AX88655 AB

5-Port 10/100/1000BASE-T Ethernet Switch

5-Port Gigabit Ethernet Switch with Embedded Memory

Document No.: AX88655AB / V0.8 / June 11, 2003

Features

•

5-port Gigabit Ethernet switch integrating MACs,

packet buffer memory and switching engine with

RGMII/GMII/MII interface

•

RGMII support REV 1.3 with 3.3V IO

•

Full Duplex 1000 Mbit/s.

•

Full and Half Duplex 10/100 Mbit/s

•

Supports auto-sensing or manual selection for

speed and duplex capability with an embedded

MPU

•

Store-and-forward operation support

•

Performs full wire-speed switching with Head of

Line (HOL) blocking prevention

•

Supports up to 8 Port-based VLAN Groups

•

Supports broadcast storm filtering

.

•

Quality-of-Service provisioning on 802.1P tag and

port-pairs with two priority queues

•

By-port Egress/Ingress bandwidth (rate) control

•

Embedded 128K Byte SRAM for packet buffer

•

Supports packet length up to 1522 bytes

•

Supports 9K/12K byte JUBMO packet

•

Integrated two-way Address-Lookup engine and

table for 4K MAC addresses

•

Programmable aging mechanism for the two-way

4K MAC addresses table

•

Two hashing schemes: direct and XOR mode.

•

Support ingress port security mode, incoming

packets with unknown source MAC address could

be dropped

•

Egress/Ingress Port Mirroring for Sniffer function

.

•

Flow control

- Full-duplex IEEE 802.3x flow control

- Half-duplex back pressure flow control

- Optional smart flow control for mix-speed

connection

•

Supports port-based trunking for high-bandwidth

links

•

Provides 5 GPIO ports

•

Provides EEPROM interface for auto-configuration

•

System clock input is one 25MHz Crystal and one

125MHz from PHY GCLK output

•

1.8 and 3.3V operations

•

3.3 I/Os and packaged in 272-pin BGA

Product Description

The AX88655AB is an 5-port 10/100/1000 Mbps Ethernet switch with, GMII/RGMII or MII Interface. The switch

controller provides network system manufacturers the ideal platform for building smart and cost-effective backbone

switches for small to medium sized businesses.

The AX88655AB 5-port 10/100/100 BASE-T single chip switch controllers combine the benefits of network

simplicity, flexibility and high integration. Its highly integrated feature set enables network system manufacturers to

build smart switches for the fast-growing small to medium business market segment.

Benefits of AX88655AB Switches are below.

Simplicity

Provides a smart, simple and low maintenance plug-and-play network interconnect system for small to

medium size businesses

Flexibility

Highly scalable configuration allows system manufacturers to enable or disable a range of features to best

meet their target price point.

Integration

Highly integrated design drives down overall switch manufacturing costs.

Target Applications

5-port Gigabit Layer 2 Switches for workgroup

High-port count Layer 2 switches with trunking

High performance solution of Ethernet backbone