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.
null Simplicity
Provides a smart, simple and low maintenance plug-and-play network interconnect system for small to
medium size businesses
null Flexibility
Highly scalable configuration allows system manufacturers to enable or disable a range of features to best
meet their target price point.
null Integration
Highly integrated design drives down overall switch manufacturing costs.

Target Applications

null 5-port Gigabit Layer 2 Switches for workgroup
null High-port count Layer 2 switches with trunking
null High performance solution of Ethernet backbone