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M22520

24-Port 10/100/1000 Mbps Ethernet MAC with an Embedded SerDes


Overview

Description

The Eagle-24 (M22520) aggregates twenty-four 10/100/1G Ethernet ports. This device support industry standard SerDes/SGMII interfaces on the line-side and a SPI-4.2 interface on the system-side. Each line side port can be independently configured to operate at 10 Megabit, 100 Megabit, or 1 Gigabit line speed. On the system-side, the SPI-4.2 interface can be configured to run at the full-speed or at quarter-speed for a total of up to 12.8 Gbps and 2.5 Gbps data throughput respectively. The devices include on chip packet memory, multi-rate Ethernet MACs, flexible oversubscription processing logic and an innovative egress multi-cast support.

Features

  • 24 line interfaces independently configurable to the SerDes and SGMII modes
  • OIF-SPI-4.2 system side interfaces
  • 24 independent 10/100/1000 Mbps Ethernet MACs
  • IEEE 802.3x based Flow Control and PAUSE frame generation support
  • RFC 2819 compliant statistics counters and additional billing and WRED counters per MAC
  • QoS support with up to four priority queues per port for triple play applications
  • On-chip packet buffer memory with Jumbo frame support for all ports
  • Fair queuing with MDRR mechanism
  • Intelligent 2:1 and 4:1 oversubscription support using WRED mechanism
  • Egress broadcast and multicast dedicated queues for video distribution applications
  • OAM&P support with Ethernet managed link (EML)
  • 1+1 link redundancy and protection switching support
  • 16/32-bit CPU interface for initialization and control
  • IEEE 1149.1 compliant boundary scan, embedded pattern generators and loop back test support
  • 0.13 micron, low power CMOS, 31 mm x 31 mm package
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