DM9000EP Product Brief
Ethernet Controller with General Processor Interface
May 2008 Rev.1.0
The DM9000 is a fully integrated and cost-effective single chip Fast Ethernet MAC
controller with a general processor interface, a 10/100M PHY and 4K Dword SRAM. It is
designed with low power and high performance process that support 3.3V with 5V tolerance.
The DM9000 also provides a MII interface to connect HPNA device or other transceivers that
support MII interface. The DM9000 supports 8-bit, 16-bit and 32-bit uP interfaces to internal
memory accesses for different processors. The PHY of the DM9000 can interface to the
UTP3, 4, 5 in 10Base-T and UTP5 in 100Base-TX. It is fully compliant with the IEEE 802.3u
Spec. Its auto-negotiation function will automatically configure the DM9000 to take the
maximum advantage of its abilities. The DM9000 also supports IEEE 802.3x full- duplex
flow control. This programming of the DM9000 is very simple, so user can port the software
drivers to any system easily.
Block Diagram
EEPROM
Interface
External MII
Interface
LED
TX+/-
RX+/-
MII Management
Control
& MII Register
Autonegotiation
Memory
Management
RX Machine
TX Machine
MAC
MII
100 Base-TX
PCS
100 Base-TX
transceiver
10 Base-T
Tx/Rx
PHYceiver
Control &Status
Registers
Internal
SRAM
Processor
Interface
