AX88178
USB to 10/100/1000 Gigabit Ethernet/HomePNA Controller
1.0 Introduction
1.1 General Description
The AX88178 USB to 10/100/1000 Gigabit Ethernet/HomePNA/HomePlug controller is a high performance and highly
integrated ASIC with embedded 40KB SRAM for packet buffering. It enables low cost and affordable Gigabit Ethernet
network connection to desktop, notebook PC, and embedded system using popular USB ports. It has an USB interface to
communicate with USB host controller and is compliant with USB specification V1.0, V1.1 and V2.0. It implements
10/100/1000Mbps Ethernet LAN function based on IEEE802.3, IEEE802.3u, IEEE802.3ab standards or HomePNA
standard. It supports media-independent interface (MII) to simplify the design on implementing Fast Ethernet and
HomePNA functions. It also provides gigabit media-independent (GMII) and reduced gigabit media-independent
(RGMII) interface for interfacing with Gigabit Ethernet PHY.
The AX88178 needs 12MHz clock for USB operation and 125MHz clock for Gigabit Ethernet operation. It is in 128-pin
LQFP low profile package with CMOS process and requires only single 3.3V power supply to operate.
1.2 AX88178 Block Diagram
Gigabit
MAC
Core
Memory Arbiter
40KB
SRAM
MII/GMII/RGMII
I/F
USB to
Ethernet
Bridge
EECS
EECK
EEDI
EEDO
MDC
MDIO
STA
SEEPROM
Loader I/F
General
Purpose I/O
USB Core and Interface
GPIO2~0
DP/DM
DPRS/DMRS
Figure 1: AX88178 Block Diagram
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ASIX ELECTRONICS CORPORATION
ASIX [ ASIX ELECTRONICS CORPORATION ]
