DM9000EP Product Brief

Ethernet Controller with General Processor Interface

May 2008 Rev.1.0

The DM9000 is a fully integrated and cost-effective single chip Fast Ethernet MAC

controller with a general processor interface, a 10/100M PHY and 4K Dword SRAM. It is

designed with low power and high performance process that support 3.3V with 5V tolerance.

The DM9000 also provides a MII interface to connect HPNA device or other transceivers that

support MII interface. The DM9000 supports 8-bit, 16-bit and 32-bit uP interfaces to internal

memory accesses for different processors. The PHY of the DM9000 can interface to the

UTP3, 4, 5 in 10Base-T and UTP5 in 100Base-TX. It is fully compliant with the IEEE 802.3u

Spec. Its auto-negotiation function will automatically configure the DM9000 to take the

maximum advantage of its abilities. The DM9000 also supports IEEE 802.3x full- duplex

flow control. This programming of the DM9000 is very simple, so user can port the software

drivers to any system easily.

Block Diagram

EEPROM

Interface

External MII

Interface

LED

TX+/-

RX+/-

MII Management

Control

& MII Register

Autonegotiation

Memory

Management

RX Machine

TX Machine

MAC

MII

100 Base-TX

PCS

100 Base-TX

transceiver

10 Base-T

Tx/Rx

PHYceiver

Control &Status

Registers

Internal

SRAM