DM9103EP Product Brief
Three Port Ethernet Switch Controller with PCI Interface
Jan. 2007 Rev.1.0
The DM9103 is a fully integrated, high performance, and cost-effective fast Ethernet switch controller
with one general PCI bus interface, two ports 10/100Mbps PHY, and one port MII or RMII interface.
Each port of the DM9103 provides four priority transmit queues, that can be defined by port-based,
802.1p VLAN, or IP packet ToS field automatically, to fit the various bandwidth and latency
requirement of data, voice, and video applications. Each port also supports ingress and/or egress rate
control to provide proper bandwidth. And up to 16 groups of 802.1Q VLAN with Tag/Un-tag functions
are supported to provide efficient packet forwarding.
The integrated two ports PHY are compliant with IEEE 802.3u standards. The MII interface provides
the flexibility to connect Ethernet PHY, and it can be configured as Reversed MII interface for SoC
with MII interface. An alternative interface, the RMII interface, is also provided to connect the lower
pin count Ethernet PHY or SoC with RMII interface
Block Diagram
Port 0
MDI/MDIX
Port 1
MDI/MDIX
10/100M
PHY
10/100M
MAC
Switch
Fabric
Switch
Engine
Embedded
Memory
Memory
BIST
10/100M
PHY
10/100M
MAC
Switch
Controller
Memory
Management
Port 2
MII / RMII
10/100M
MAC
PCI BUS
Processor
Interface
HOST
MAC
Control
Registers
MIB
Counters
EEPROM
Interface
EEPROM
DAVICOM [ DAVICOM SEMICONDUCTOR, INC. ]
