dm9000bi Davicom Semiconductor, Inc., dm9000bi Datasheet - Page 6

• Manufacturer Part Number: dm9000bi
• Description: Industrial-grade Ethernet Controller With General Processor Interface
• Manufacturer: Davicom Semiconductor, Inc.

1. General Description
The DM9000BI is a fully integrated and cost-effective
Industrial-grade low pin count single chip Fast
Ethernet controller with a general processor interface,
a 10/100M PHY and 4K Dword SRAM. It is designed
with low power and high performance process
interface that support 3.3V with 5V IO tolerance.
The DM9000BI supports 8-bit and 16-bit data
interfaces to internal memory accesses for various
2. Block Diagram
Preliminary
Version: DM9000BI-13-DS-P02
January 17, 2008
TX+/-
RX+/-
AUTO-MDIX
100 Base-TX
transceiver
PHYceiver
Industrial-grade Ethernet Controller with General Processor Interface
Autonegotiation
LED
100 Base-TX
10 Base-T
Tx/Rx
PCS
processors. The PHY of the DM9000BI can interface to
the UTP3, 4, 5 in 10Base-T and UTP5 in 100Base-TX with
HP Auto-MDIX. It is fully compliant with the IEEE 802.3u
Spec. Its auto-negotiation function will automatically
configure the DM9000BI to take the maximum advantage of
its abilities. The DM9000BI also supports IEEE 802.3x full-
duplex flow control.
MII Management
& MII Register
Control
MII
MAC
RX Machine
TX Machine
Registers
&Status
Control
EEPROM
Management
Interface
Internal
Memory
SRAM
DM9000BI
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