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DM8603EP 数据表(PDF) 8 Page - Davicom Semiconductor, Inc.

部件名 DM8603EP
功能描述  10/100 Mbps 3-port Ethernet Switch Controller with MII / RMII Interface
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制造商  DAVICOM [Davicom Semiconductor, Inc.]
网页  http://www.davicom.com.tw
标志 DAVICOM - Davicom Semiconductor, Inc.

DM8603EP 数据表(HTML) 8 Page - Davicom Semiconductor, Inc.

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DM8603
10/100 Mbps 3-port Ethernet Switch Controller with MII / RMII Interface
Preliminary datasheet
8
DM8603-12-DS-P01
November 8, 2010
1.
General Description
The DM8603 is Davicom’s new fully integrated three-port 10M/100Mbps Fast Ethernet
Controller. As a fast Ethernet switch, the DM8603 consists of two PHY ports and a third port with
either MII or RMII interface. As the DM8603 was designed with our customers’ requirements in
mind, the switch is optimized for high performance while being highly cost-effective.
The two PHY ports on the DM8603 are IEEE 802.3u standards compliant. Aside for the first two
PHY ports and in an effort for maximum application flexibility, the third port on the DM8603 offers
the options to either connect with an MII, reversed MII, or RMII. The reversed MII configuration is
used to connect with SoC’s with a MII interface. The RMII interface is the alternative interface
configuration in case of the need to connect a lower pin count Ethernet PHY or SoC.
To maximize the performance of each port, the DM8603 was designed with a number of
features. For proper bandwidth, each port also supports ingress and/or egress rate control. In
support of efficient packet forwarding, the DM8603 has port-based VLAN with tag/un-tag functions
for up to 16 groups of 802.1Q. Each port includes MIB counters, loop-back capability, built in
memory self test (BIST) for the system, and board level diagnostic.
In designing for the requirements of various data, voice, and video applications, enough internal
memory has been provided for usage of the DM8603’s three ports, and the internal memory
supports up to 1K uni-cast MAC address table. Then to meet the demands of various bandwidth
and latency issues in data, voice, and video applications, each port of the DM8603 has four priority
transmit queues. These queues can be defined either through port-based operation, 802.1p
VLAN, or the IP packet TOS field automatically.
2.
Block Diagram
10/100M
PHY
Port 0
MDI / MDIX
Port 1
MDI / MDIX
Port 2
MII / RMII
Switch
Controller
Control
Registers
MIB
Counters
EEPROM
Interface
Embedded
Memory
Memory
BIST
Memory
Management
Switch Engine
LED
Control
LEDs
EEPROM
Switch Fabric
SMI I/F
10/100M
PHY
10/100M
MAC
10/100M
MAC
10/100M
MAC


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