AX88780 datasheet(7/55 Pages) ASIX

部件名	AX88780

功能描述	High-Performance Non-PCI Single-Chip 32-bit 10/100M Fast Ethernet Controller

PDF	55 Pages

Scroll/Zoom	100%

制造商	ASIX [ASIX Electronics Corporation]

网页	http://www.asix.com.tw

标志

7 / 55 page

AX88780

ASIX ELECTRONICS CORPORATION

1.0 Introduction

1.1 General Description

AX88780 supports full-duplex or half-duplex operation at 10/100 Mbps speed with auto-negotiation or manual setting.

The AX88780 has two built-in synchronous SRAMs for buffering packet.

The one is 32K bytes for receiving packets

from Ethernet; the other is 8K-bytes for transmitting packets from host system to Ethernet. The AX88780 also has 256

bytes built-in configuration registers. For software programming, the total address space used in AX88780 is 64K bytes in

32-bit mode and at least (8K + 8) bytes in 16-bit mode.

Because AX88780 is a SRAM-like device, AX88780 could be treated as a SRAM device and be attached to SRAM

controller of system. Therefore, system can execute DMA cycles to gain the highest performance. AX88780 needs 2 clock

sources, one is HCLK and another one is XTLP. The HCLK clock can be from the host system clock or from a stand-along

OSC, and the XTLP/XTLN clock is 25Mhz for internal PHY.

1.2 AX88780 Block Diagram

Figure 1: AX88780 block diagram

AX88780 数据表(PDF) 7 Page - ASIX Electronics Corporation