The DM8603 is Davicom’s new fully integrated three-port 10M/100Mbps Fast Ethernet Controller with Fiber interface. 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.

• IEEE 802.3/u 10Base-T/100Base-TX compatible
• Ethernet Switch Ports:
  -Two 10/100Mbps PHY
  -One MII/RMII interface with Reversed MII support
• Supports auto crossover function - HP Auto-MDIX
• Flow Control
  -Supports IEEE 802.3x Flow Control in Full-duplex mode
  -Supports Back Pressure Flow Control in Half-duplex mode
• Per port support bandwidth, ingress and egress rate control
• Per port support priority queues
  -Each port with four queues
  -Port-based, 802.1P VLAN, or IP TOS priority
• Supports 802.1Q VLAN for up-to 16 VLAN groups
• Supports VLAN ID tag/untag options
• Supports special tag and double tag header
• Supports up-to 1K Unicast/Multicast shared MAC addresses
• Supports store and forward switching approach
• Supports Broadcast Storming filter function
• Supports Serial Data Management Interface
• Automatic aging scheme
• Supports MIB counters for diagnostic
• Supports 100M Fiber interface.

• Supports hardware-based IGMP v1,v2 Snooping
• Supports hardware-based MLD v1 Snooping
• Supports IEEE 802.1d STP (Spanning Tree Protocol) and IEEE 802.1w RSTP (Rapid Spanning Tree Protocol)
• EEPROM Interface
  -Power up configurations
  -93C46 or 93C56 auto detection
• Package
  -64-pin LQFP
• Power
  -1.8V/3.3V Dual Power
  -3.3V I/O with 5V tolerance

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.