10/100Base-TX/FX switch base Single-Chip Media Converter with 8/16-Bit processor Interface

The DM9302 is a fully integrated, high performance, and cost-effective fast Ethernet switch controller with general processor bus interface and one TX-Port plus one FX-Port.
The general processor bus connects directly to internal host MAC with 8- or 16-bit data to access internal memory. The host MAC has the similar functions as other 10/100Mbps PHY or MII do.
The internal memory of the DM9302 supports up to 1K uni-cast MAC address table, and provide to two ports' and processor port's transmit and receive buffers. For efficient memory usage algorithm, a total of 48KB memory are shared with two ports and processor port in link list data structure. The port of the DM9302 provides four priority transmit queues, that can be defined by port-based, 802.1p VLAN, or IP packet ToS field automatically, to fit the various bandwidth and latency requirement of data, voice, and video application. Each port also supports ingress and/or egress rate control to provide proper bandwidth. And up to 16 groups of 802.1Q VLAN with Tag/Un-tag functions are supported to provide efficient packet forwarding.
The TCP/UDP/IPv4 checksum generation and checking functions are also provided by processor port to offload the processor compute loading. Besides the packet transmit and receive functions, the processor port also provides various registers to control and get status of the DM9302 functional operation. Each port, include the processor port, provide the MIB counters and loop-back capability and the build in memory self test (BIST) for system and board level diagnostic. The integrated two ports PHY are compliant with IEEE 802.3u standards and support auto-MDI/MDIX for twisted pair cable transmit/receive direction switching automatically.

Features
- 64 pin LQFP
- 0.18 µm process
- integrated 10/100 transceiver with auto-MDIX 10/100Mb transceiver
- IP/TCP/UDP checksum
- up to 100 Mhz system clock
- processor interface: byte/word
- integrated 3.3V to 1.8V Converter
- 0 - 70°C / -40-85°C temperature range

Additional Documents:

DM9302 Data Sheet

General Layout Guide
DM9013 and DM9161 Schematic Diagrams
Programming Guide
Davicom Switch Controller
Connecting two devices without transformers
RX Pointer Restriction
Design Hint Connection RJ45 - Center Tabs to PHY

RoHs and further information:
Material Safety Data Sheet - Ink Marking
Material Safety Data Sheet - Laser Marking
RoHs Compliance Information
Recommended Soldering
Customs clearance number: 85423190 according to
Liste vom Statistischen Bundesamt valid from 01.01.2007