MTD655 Datasheet | MYSON TECHNOLOGY

FEATURES - IEEE802.3 Clause 9 and IEEE802.3u Cluse 27 pliant. - Provide 4 RMII (Reduced Media Independent Interface) ports and 1 MII port. - 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. - Use simple and low cost asynchronous SRAM (high speed ASRAM 128k- 8 : one pcs only) - 128 pin PQFP package, 5V operation voltage. 5 Port 10M/100M Hub With 2 port Switch GENERAL DESCRIPTION The MTD655 is a highly integrated, 10M/ 100M dual speed hub with build_in 2 port switch. Support 4 RMII ports and 1 MII port for 10M/ 100M operation, and meet 100M_hub class_2 spec when connect with external PHYceivers. The MTD655 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. The build_in 2 port switch, support 2k MAC addresses filtering, and use low cost asynchronous high speed SRAM (128k- 8) one pcs only for packet buffering. This 2 port switch can also be configured to be up_link switch when hub is under slave mode. The MTD655 also support an simple and effective LED display function, provide 10M_col, 100M_col, memory_test_fail, and per port’ s partition status. BLOCK DIAGRAM ASRAM Interface Two Port Switch Uplink Switch Enable(10/100,FD/HD) RMII4 10M_HD 10M Inter Hub Bus RMII3 RMII2 RMII1 10M Hub Port Switch Logic 100M_HD 100M Inter Hub Bus MII0 100M Hub This datasheet contains new product information. Myson Technology reserves the rights...