GENERAL DESCRIPTION
The MTD508 complies fully with the IEEE802.3,
802.3u and 802.3x specifications and is a nonblocking
8-port 10M/100M Ethernet switch device.
The MTD508 supports 8 RMII ports for 10M/100M
operations. 1MBytes/2MBytes memory interface
provides maximum 1365 packet buffers for Ethernet
packet buffering. Up to 8192 address entries are
provided by the MTD508, and the MTD508 uses full
Ethernet address to compare algorithm for
minimizing hashing collision events.
The MTD508 provides EEPROM interface to
configure port trunking, port VLAN, static entry,
802.3x flow control threshold, flooding port,
broadcast control threshold. Each MTD508 port
supports 10M/100M auto-negotiation by MDC/MDIO
interface for connecting external PHY devices.
The MTD508 also provides 10 pins for Link/RX
activities, packet butter utilization LED display
functoin.

FEATURES
• IEEE802.3 and IEEE802.3u compliant.
• Provides 8 RMII (Reduced Media Independent
Interface) ports.
• Programmable 1K/8K MAC addresses filtering.
• Store and forward switching function and bad
packet filtering function.
• Optional back-pressure/802.3x flow control/
flooding control/broadcast control.
• Optional EEPROM interface for advanced switch
configurations.
• 1MB/2MB SGRAM/SDRAM flexible memory
interface.
• Port VLAN/trunking.
• Link/Rx activities, packet buffer utilization LED
display.
• 75MHz for non-blocking for 8-port switch
operation.
• Built-in interna/external memory test function.
• 160-pin PQFP package, 3.3V operating voltage.