GENERAL DESCRIPTION
The DM9003 is a fully integrated, high-performance, and cost-effective Fast Ethernet switch controller with one general processor bus interface, two port 10M/100Mbps PHYs.

FEATURES
‰  Ethernet Switch with two 10/100Mbps PHYs and general processor bus interface
‰  Processor bus slave architecture
‰  EEPROM interface for power-up configuration
‰  TCP/UDP/IPv4 checksum offload
‰  Support HPAuto-MDIX
‰  IEEE 802.3x Flow Control in Full-duplex mode
‰  Back Pressure Flow Control in Half-duplex mode
‰  Each port supports 4 priority queues by Port-based, 802.1P QoS, and IP TOS priority
‰  Support 802.1Q VLAN up to 16 VLAN groups
‰  Support VLAN ID tag/untag option
‰  Each port supports bandwidth, ingress and egress rate control
‰  Support Broadcast Storming filter function
‰  Support Store and Forward switching approach
‰  Support up to 1K uni-cast MAC addresses
‰  Automatic aging scheme
‰  Support MIB counters for diagnostic
‰  uP data driving capability adjustable
‰  64-pin LQFP 1.8V internal core, 3.3V I/O with 5V tolerant