DM9000_09 Datasheet, PDF (1/53 Pages) Davicom Semiconductor, Inc. – ISA to Ethernet MAC Controller with Integrated 10/100 PHY

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