AX88780_07 ASIX [ASIX Electronics Corporation], AX88780_07 Datasheet - Page 7

• Manufacturer Part Number: AX88780_07
• Description: High-Performance Non-PCI Single-Chip 32-bit 10/100M Fast Ethernet Controller
• Manufacturer: ASIX [ASIX Electronics Corporation]

1.0 Introduction
1.1 General Description
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.
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
AX88780 supports full-duplex or half-duplex operation at 10/100 Mbps speed with auto-negotiation or manual setting.
Because AX88780 is a SRAM-like device, AX88780 could be treated as a SRAM device and be attached to SRAM
Figure 1: AX88780 block diagram
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ASIX ELECTRONICS CORPORATION
AX88780