AX88172L Datasheet, PDF (4/28 Pages) ASIX Electronics Corporation – USB to Fast Ethernet/HomePNA Controller

AX88172
PRELIMINARY
1.0 Introduction
1.1 General Description:
The AX88172 USB to Fast Ethernet Controller is a high performance and highly integrated USB bus Ethernet Controller
with embedded 7K*16 bit SRAM. The AX88172 supported Full/High Speed USB Device with bus power capability. The
AX88172 implements both 10Mbps and 100Mbps Ethernet function based on IEEE802.3/ IEEE802.3u LAN standard.
The AX88172 supports media-independent interface (MII) to simplify the design on implementing Fast Ethernet and
HomePNA functions.
AX88172 uses 80-pin LQFP low profile package, 12MHz operation for USB and 25MHz operation for Ethernet, CMOS
process with pure 3.3V operation.
1.2 AX88172 Block Diagram:
EECS
EECK
EEDI
EEDO
7K* 16
SRAM
Memory Arbiter
SEEPROM
Loader I/F
USB to
Ethernet
Bridge
USB Core and Interface
STA
MAC
Core
MDC
MDIO
MII /IF
Fig – 1 AX88172 Block Diagram
DM/DP
4
ASIX ELECTRONICS CORPORATION