DM8603EP DAVICOM [Davicom Semiconductor, Inc.], DM8603EP Datasheet - Page 8

• Manufacturer Part Number: DM8603EP
• Description: 10/100 Mbps 3-port Ethernet Switch Controller with MII / RMII Interface
• Manufacturer: DAVICOM [Davicom Semiconductor, Inc.]

1. General Description
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.
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.
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.
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.
VLAN, or the IP packet TOS field automatically.
2. Block Diagram
Preliminary datasheet
DM8603-12-DS-P01
November 8, 2010
MDI / MDIX
MDI / MDIX
The DM8603 is Davicom’s new fully integrated three-port 10M/100Mbps Fast Ethernet
The two PHY ports on the DM8603 are IEEE 802.3u standards compliant. Aside for the first two
To maximize the performance of each port, the DM8603 was designed with a number of
In designing for the requirements of various data, voice, and video applications, enough internal
MII / RMII
Port 0
Port 1
Port 2
10/100M
10/100M
PHY
PHY
These queues can be defined either through port-based operation, 802.1p
10/100M
10/100M
10/100M
MAC
MAC
MAC
10/100 Mbps 3-port Ethernet Switch Controller with MII / RMII Interface
Switch Fabric
Switch Engine
Controller
Registers
Control
Switch
Counters
MIB
Management
Embedded
Memory
Memory
EEPROM
Interface
Control
LED
Memory
BIST
DM8603
EEPROM
LEDs
SMI I/F
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