DM9016
3-port switch with Processor Interface
1. General Description
The DM9016 is a fully integrated and cost-effective
fast Ethernet switch controller with two ports
10M/100M PHY, one port MII or RMII or Reverse MII
interface, and general processor bus interface. The
integrated two ports PHY are compliant with IEEE
802.3u standards and support HP Auto-MDIX
capabilities for twisted-pair cable transmit/receive
direction automatic switching. The MII interface
provides the flexibility to connect Ethernet PHY or
SoC with MII/RMII interface. The general processor
bus can be configured as 8-, 16-, or 32-bit data width.
The DM9016 is a managed Switch, not only provides
basic Layer-2 switch functions but offers advanced
features that include 802.1Q VLAN, priority queuing
management, bandwidth rate control, monitoring port
traffic, multicast packet filtering, port security and
hardware-based IGMP V1/V2 Snooping, etc.
The general processor bus can be configured as 8-,
16-, or 32-bit data width and interfaces to most
embedded
CPU.
The
DM9016
provides
TCP/UDP/IPv4 checksum offload function to alleviate
host CPU load for improved system performance.
The adjustable transmit/receive buffer of processor
port can facilitate CPU in processing applications
such as Video and Voice streaming. For power
management feature, the DM9016 support wake on
LAN function via link status change or magic packet
detection.
Additionally, the MIB counters, loop-back capability
and the memory Build-in Self Test (BIST) are useful
for system and board level diagnostic.
2. Block Diagram
Switch Engine
Port 0
MDI / MDIX
10/100M
PHY
10/100M
MAC
Switch Fabric
Embedded
Memory
Memory
BIST
Port 1
MDI / MDIX
10/100M
PHY
10/100M
MAC
Switch
Controller
Memory
Management
Port 2
MII / RMII
Reverse MII
10/100M
MAC
LED
Control
Processor
Interface
Host
MAC
Control
Registers
MIB
Counters
EEPROM
Interface
Bandwidth
LEDs
8 , 16 , 32 bit
Processor
Bus
EEPROM
Preliminary datasheet
DM9016-13-DS-P01
March 26, 2009
11
DAVICOM [ DAVICOM SEMICONDUCTOR, INC. ]
