ASIX ELECTRONICS CORPORATION

4

CONFIDENTIAL

AX88170

PRELIMINARY

1.0 Introduction

1.1 General Description:

The AX88170 USB toFast Ethernet Controller is a high performance and highly integrated USB busEthernet Controller with

embedded 5K*16 bit SRAM. The AX88170 contains a full speed USB interface to host CPU and compliant with USB

Communication Class Spec. 1.0. The AX88170 implements both 10Mbps and 100Mbps Ethernet function based on

IEEE802.3 / IEEE802.3u LAN standard. The AX88170 supports media-independent interface (MII) or RMII (Reduce MII)

interface to simplify the design on implementing Fast Ethernet and HomePNA functions. The chip also provides an optional

MII/RMII interface with PHY mode, combines with Ethernet repeater or switch IC can build a multiple ports USB-to-USB

bridge application.

AX88170 uses 64-pin LQFP low profile package, 48MHz operation for USB and 25MHz operation for Ethernet, CMOS

process with pure 3.3V operation and 5 Volt I/O tolerance.

1.2 AX88170 Block Diagram:

Fig – 1 AX88170 Block Diagram

MAC

Core

Memory Arbiter

USB to

Ethernet

Bridge

USB Core and Interface

STA

SEEPROM

Loader I/F

D-/D+

MII I/F

Or

RMII I/F

SMDC

SMDIO

EECS

EECK

EEDI

EEDO

5K* 16

SRAM