DM9000BEP Product Brief

Ethernet Controller with General Processor Interface

June 2008 Rev.1.0

The DM9000B is a fully integrated and cost-effective low pin count single chip

Fast Ethernet controller with a general processor interface, a 10/100M PHY and 4K

Dword SRAM. It is designed with low power and high performance process interface

that support 3.3V with 5V IO tolerance.

The DM9000B supports 8-bit and 16-bit data interfaces to internal memory accesses

for various processors. The PHY of the DM9000B can interface to the UTP3, 4, 5 in

10Base-T and UTP5 in 100Base-TX with

HP Auto-MDIX. It is fully compliant with the IEEE 802.3u Spec. Its auto-negotiation

function will automatically configure the DM9000B to take the maximum advantage

of its abilities. The DM9000B also supports IEEE 802.3x full- duplex flow control.

Block Diagram

EEPROM

Interface

AUTO-MDIX

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