[MYSON TECHNOLOGY]

GENERAL DESCRIPTION

The MTD658E is a highly integrated, 10M/ 100M dual speed hub with build_in 2 port switch and 64k8 embedded ASRAM. Support 8 RMII ports for 10M/100M operation, and really meet 100M_hub class_2 spec when connect with external QPHYceivers.

The MTD658E provides two Inter-repeater stacking bus for 10M and 100M expansion each, easily stack to 4 units without any external arbitration logic. If using external arbitration logic and proper bus driver, can stack to 6 units and up.

FEATURES

• IEEE802.3 Clause 9 and IEEE802.3u Cluse 27 compliant.

• Provide 8 RMII (8 port mode), or 4 RMII + 1 MII (5 port mode).

• Provide 2 inter_repeater stacking bus for 10M and 100M port expansion each.

• Support stacking to 4 units without any external arbitration logic ( if use external arbitration logic, theoretically can stack to 6 units and up) .

• Build_in 2 port switch controller, support up to 2048 MAC addresses filtering database.

• Optional back_pressure flow control.

• Optional up_link_switch port function (in slave hub), support 100FX 2km distance extension in 100FD mode.

• Meet Class_2 repeater specification for 100M_hub.

• Pin compatible with MTD658/655 application, no need any external memory buffers.

• 128 pin QFP package, 3.3V operation voltage.