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.