ASIX ELECTRONICS CORPORATION

Released Date: 12/24/2007

4F, NO.8, Hsin Ann Rd., Hsinchu Science Park, Hsin-Chu City, Taiwan, R.O.C. 300

TEL: 886-3-579-9500

FAX: 886-3-579-9558

http://www.asix.com.tw/

AX88772A/AX88172A

Low-pin-count

USB 2.0 to 10/100M Fast Ethernet Controller

Features

Single chip USB 2.0 to 10/100M Fast Ethernet controller –

AX88772A

Single chip USB 2.0 to MII, single chip MII to Ethernet and

USB Bridging controller in Dual-PHY mode (submitted for

US patent application) – AX88172A

USB Device Interface

Integrates on-chip USB 2.0 transceiver and SIE

compliant to USB Spec 1.1 and 2.0

Supports USB Full and High Speed modes with

Bus-Power or Self-Power capability

Supports 4 or 6 programmable endpoints on USB

interface

High performance packet transfer rate over USB bus

using proprietary burst transfer mechanism (submitted for

US patent application)

Supports USB to Ethernet bridging or vice versa in

hardware

Fast Ethernet Controller

Integrates 10/100Mbps Fast Ethernet MAC/PHY

IEEE 802.3 10BASE-T/100BASE-TX compatible

Supports

twisted

pair

crossover

detection and

auto-correction (HP Auto-MDIX)

Embedded 16KB SRAM for RX packet buffering and

8KB SRAM for TX packet buffering

Supports both Full-duplex with flow control and

Half-duplex with backpressure operation

Supports 2 VLAN ID filtering, received VLAN Tag (4

bytes) can be stripped off or preserved

MAC/PHY loop-back diagnostic capability

Support Wake-on-LAN Function

Supports Suspend Mode and Remote Wakeup via

Link-up, Magic packet, MS wakeup frame and external

pin

Optional PHY power down during Suspend Mode

Versatile External Media Interface

Optional MII interface in MAC mode allows AX88172A

to work with external 100BASE-FX Ethernet PHY or

HomePNA PHY

Optional Reverse-MII or Reverse-RMII interface in PHY

mode allows AX88172A to work with external

HomePlug PHY or glueless MAC-to-MAC connections

Optional Reverse-MII interface in Dual-PHY mode

allows AX88172A to act as an Ethernet PHY or USB 2.0

PHY for external MAC device that needs Ethernet and

USB in system application

Supports 256/512 bytes (93c56/93c66) of serial EEPROM

(for storing USB Descriptors)

Supports automatic loading of Ethernet ID, USB Descriptors

and Adapter Configuration from EEPROM after power-on

initialization

Provides optional serial interface, I2C, SPI and UART

Integrates on-chip voltage regulator and only requires a

single 3.3V power supply

12MHz and 25Mhz clock input from either crystal or

oscillator source

Integrates on-chip power-on reset circuit

Small form factor with 64-pin LQFP (AX88772A) or 80-pin

TQFP (AX88172A) RoHS compliant package

Operating temperature range: 0°C to 70°C.

*IEEE is a registered trademark of the Institute of Electrical and

Electronic Engineers, Inc.

*All other trademarks and registered trademark are the property of their

respective holders.

Product Description

The AX88772A/AX88172A Low-pin-count USB 2.0 to 10/100M Fast Ethernet controller is a high performance and highly integrated

ASIC which enables low cost, small form factor, and simple plug-and-play Fast Ethernet network connection capability for desktops,

notebook PC’s, Ultra-Mobile PC’s, docking stations, game consoles, digital-home appliances, and any embedded system using a

standard USB port.

The AX88772A/AX88172A features a USB interface to communicate with a USB Host Controller and is compliant with USB

specification V1.1 and V2.0. The AX88772A/AX88172A implements 10/100Mbps Ethernet LAN function based on IEEE802.3, and

IEEE802.3u standards with 24KB of embedded SRAM for packet buffering. The AX88772A/AX88172A integrates an on-chip

10/100Mbps Ethernet PHY to simplify system design.

The AX88172A provides an optional External Media Interface (EMI) for external PHY or external MAC for different application

purposes. The EMI can be a media-independent interface (MII) for implementing 100BASE-FX Ethernet or HomePNA functions. The

EMI can also be a Reverse-MII or Reverse Reduced-MII (Reverse-RMII) for glueless MAC-to-MAC connections to any MCU with

Ethernet MAC MII or RMII interface. In addition, the EMI can be configured to Dual-PHY mode allowing AX88172A to act as an

Ethernet PHY or USB 2.0 PHY for external MAC device that needs Ethernet and USB interfaces in their system applications. The

optional serial interface such as I2C, SPI, and UART are provided as a control channel from the USB Host Controller to communicate

with the external MCU chip.

Always contact ASIX for possible updates before starting a design.

This data sheet contains new products information. ASIX ELECTRONICS reserves the rights to modify product specification without notice. No

liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.

Document No: AX88x72A/V1.1/12/24/07