Features
• Switch Management Capabilities
- 10/100/1000Mbps Ethernet switch basic functions:
frame buffer management, address look-up table,
queue management, MIB counters
- Non-blocking store-and-forward switch fabric assures
fast packet delivery by utilizing 4096 entry forwarding
table with 128kByte frame buffer
- Jumbo packet support up to 9000 bytes
- Port mirroring/monitoring/sniffing:
ingress and/or egress traffic to any port
- MIB counters for fully-compliant statistics gathering
34 counters per port
- Tail tagging mode (one byte added before FCS) support
at host port to inform the processor which ingress
port receives the packet and its priority
- Loopback modes for remote failure diagnostics
- Rapid spanning tree protocol (RSTP) support for topology
management and ring/linear recovery
- Multiple spanning tree protocol (MSTP) support
• Two Robust Integrated PHY Ports
- 1000BASE-T/100BASE-TX/10BASE-T IEEE 802.3
- Fast Link-up option significantly reduces link-up time
- Auto-negotiation and Auto-MDI/MDI-X support
- Energy-Efficient Ethernet (EEE) support with lowpower
idle mode and clock stoppage
- On-chip termination resistors and internal biasing for
differential pairs to reduce power
- LinkMD® cable diagnostic capabilities for determining
cable opens, shorts, and length
• One Configurable External MAC Port
- Reduced Gigabit Media Independent Interface
(RGMII) v2.0
- Reduced Media Independent Interface (RMII) v1.2
with 50MHz reference clock input/output option
- Media Independent Interface (MII) in PHY/MAC mode
• Advanced Switch Capabilities
- IEEE 802.1Q VLAN support for 128 active VLAN
groups and the full range of 4096 VLAN IDs
- IEEE 802.1p/Q tag insertion/removal on per port basis
- VLAN ID on per port or VLAN basis
- IEEE 802.3x full-duplex flow control and half-duplex
back pressure collision control
- IEEE 802.1X (Port-Based Network Access Control)
- IGMP v1/v2/v3 snooping for multicast packet filtering
- IPv6 multicast listener discovery (MLD) snooping
- IPv4/IPv6 QoS support, QoS/CoS packet prioritization
- 802.1p QoS packet classification with 4 priority queues
- Programmable rate limiting at ingress/egress ports
- Broadcast storm protection
- Four priority queues with dynamic packet mapping for
IEEE 802.1p, IPv4 DIFFSERV, IPv6 Traffic Class
- MAC filtering function to filter or forward unknown unicast,
multicast and VLAN packets
- Self-address filtering for implementing ring topologies
• Comprehensive Configuration Registers Access
- High-speed 4-wire SPI (up to 50MHz), I2C interfaces
provide access to all internal registers
- MII Management (MIIM, MDC/MDIO 2-wire) Interface
provides access to all PHY registers
- In-band management via any of the three ports
- I/O pin strapping facility to set certain register bits from
I/O pins at reset time
- On-the-fly configurable control registers
• Power Management
- IEEE 802.3az Energy Efficient Ethernet (EEE)
- Energy detect power-down mode on cable disconnect
- Dynamic clock tree control
- Unused ports can be individually powered down
- Full-chip software power-down
- Wake-on-LAN (WoL) standby power mode

Target Applications
• Stand-alone 10/100/1000Mbps Ethernet switches
• VoIP infrastructure switches
• Broadband gateways/firewalls
• Wi-Fi access points
• Integrated DSL/cable modems
• Security/surveillance systems
• Industrial control/automation switches
• Networked measurement and control systems