DM9000
ISA to Ethernet MAC Controller with Integrated 10/100 PHY
1. General Description
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.
2. Block Diagram
LED
External MII
Interface
EEPROM
Interface
PHYceiver
100 Base-TX
transceiver
TX+/-
10 Base-T
Tx/Rx
RX+/-
100 Base-TX
PCS
MII
MAC
TX Machine
Control &Status
Registers
Memory
Management
RX Machine
Internal
SRAM
Autonegotiation
MII Management
Control
& MII Register
Final
Version: DM9000-DS-F03
April 23, 2009
Processor
Interface
1
DAVICOM [ DAVICOM SEMICONDUCTOR, INC. ]
