LDIC LD9004 Datasheet

LD9004

4-port 10/100/1000Mbps Layer 2 Ethernet Switch

Version 1.0

DESCRIPTION

This Layer 2 Switch provides an ideal solution for the design of unmanaged full wire-speed
multi-port Gigabit Ethernet (GbE) switches. Each port supports either 10/100/1000Mbps data
rate. Flow controls, backpressure in half duplex mode and PAUSE frame in full duplex mode are
employed to solve the HOL (Head of Line) blocking.

This Layer 2 Switch integrates four half/full duplex mode 1000BASE Gigabit Ethernet MACs,
wire speed switching engines, MAC address based Address Parsing Algorithm, Packet buffer
memory.

FEATURES

• Supports four 10/100/1000 Mbps Ethernet ports with GMII/MII interface.

• IEEE 802.3ab CSMA/CD Compliant

• Full and half duplex mode of operation.

• Speed and Duplex mode auto-negotiation through MDIO.

• Self address learning mechanism supports 512 MAC address.

• Automatic address aging with 300 seconds default.

• 1Mbit packet buffer memory embedded

• SPI interface employed to communicate with MCU.

• IEEE802.3ab flow control for full duplex operation.

• Supports Store-and-Forward mode of operation.

• 0.18 micron, 1.8V CMOS technology packaged in 160-pin PQFP.

• 3.3V I/O.

LD9004

4-port 10/100/1000Mbps Layer 2 Ethernet Switch

Version 1.0

Ethernet Level 2 Switch Block Diagram