MTD655 Datasheet, PDF (1/18 Pages) List of Unclassifed Manufacturers – 5 Port 10M/100M Hub With 2 port Switch

MYSON
MTD655
TECHNOLOGY
5 Port 10M/100M Hub With 2 port Switch
FEATURES
GENERAL DESCRIPTION
• IEEE802.3 Clause 9 and IEEE802.3u Cluse 27
compliant.
• 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.
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 arbi-
tration 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 asynchro-
nous 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 parti-
tion status.
BLOCK DIAGRAM
10M
Inter Hub Bus
100M
Inter Hub Bus
ASRAM Interface
Two Port
Switch
Uplink Switch Enable(10/100,FD/HD)
10M_HD
10M
Hub
100M_HD
100M
Hub
Port
Switch
Logic
RMII4
RMII3
RMII2
RMII1
MII0
This datasheet contains new product information. Myson Technology reserves the rights to modify the product specification
without notice. No liability is assumed as a result of the use of this procuts. No rights under any patent accompany the sales of
the product.
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MTD655 Revision 2.0 17/03/2000