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DM8603: 3-Port Fast Ethernet Switch Controller


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. 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.



No Description / Download Type Version Date Size
01 Davicom General Layout-Guide PDF 1.01 2011/05/05 719kB
02 Davicom Hardware Layout Guide PDF   2009/01/08 9,4M
03 Dacom Ethernet Design-In Guide PDF 1.00 2011/11/18 2,64M
04 Connecting 2 Davicom devices without transformers PDF   2007/12/11 76kB
05 Design hint Center-Tabs Transformer to PHY PDF   2011/02/02 305kB
06 Crystal Information PDF   2013/09/24 59kB
07 Programming-Reference-Flow-Chart PDF 1.00 2009/01/07 130kB

Part Specific:

11 DM8xxx Crossed RMII PDF   2009/12/03 91kB
12 DM8xxx Reduced MII PDF   2009/12/03 47kB
13 DM8xxx Reverse MII PDF   2009/12/03 90kB
14 DM8xxx Reverse RMII PDF   2009/12/03 71kB
15 DM8603 DM8603 to DM9161A and DM9161C Schematic PDF   2012/05/25 106kB
16 DM8603 Schematic Demo Board PDF   2010/10/13 88kB
17 DM8603 Fiber Application Note PDF   2012/06/12 156kB
18 DM8603 Link Fault Pass PDF   2011/03/31 102kB
19 DM8203 E5-E6 Migration to DM8603 PDF   2010/11/29 116kB
20 DM8203 Crossed RMII-Reverse-MII to MCU PDF   2009/12/03 184kB
21 DM8203 Schematic Reduced MII JPG   2007/06/05 36kB
22 DM8203 Schematic Reverse MII JPG   2008/06/20 35kB