DM9000AEP Electronic IC Chips , popular linear and digital integrated circuits

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DM9000A

Ethernet Controller with General Processor Interface

General Description

The DM9000A 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 that support 3.3V with 5V IO tolerance.

The DM9000A supports 8-bit and 16-bit data interfaces to internal memory accesses for various processors. The PHY of the DM9000A 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 DM9000A to take the maximum advantage of its abilities. The DM9000A also supports IEEE 802.3x fullduplex flow control..

Features

■ 48-pin LQFP

■ Supports processor interface: byte/word of I/O command to internal memory data operation

■ Integrated 10/100M transceiver with HP Auto-MDIX

■ Supports back pressure mode for half-duplex mode flow control

■ IEEE802.3x flow control for full-duplex mode

■ Supports wakeup frame, link status change and magic packet events for remote wake up

■ Support 100M Fiber interface.

■ Integrated 16K Byte SRAM

■ Build in 3.3V to 2.5V regulator

■ Supports early Transmit

■ Supports IP/TCP/UDP checksum generation and checking

■ Supports automatically load vendor ID and product ID from EEPROM

■ Optional EEPROM configuration

■ Very low power consumption mode:

   – Power reduced mode (cable detection)

   – Power down mode

   – Selectable TX drivers for 1:1 or 1.25:1 transformers for additional power reduction.

■ Compatible with 3.3V and 5.0V tolerant I/O

Absolute Maximum Ratings ( 25°C )

Block Diagram

Pin Configuration

(16-bit mode)

(8-bit mode)