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

This Layer 2 Switch provides an ideal solution for the design of unmanaged full wire-speed multi-port Gigabit Ethernet(GbE) switches. Each port support 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 communicated 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.

SYSTEM OVERVIEW

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