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DP83858VF Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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DP83858VF Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 37 page  http:\\www.national.com © 1998 National Semiconductor Corporation General Description The DP83858 100 Mb/s TX/T4 Repeater Interface Control- ler, known as 100RIC8, is designed specifically to meet the needs of today's high speed Ethernet networking systems. The DP83858 is fully compatible with the IEEE 802.3 repeater's clause 27. This device is targeted at low port count managed and unmanaged repeater applications. The DP83858 supports up to eight 100 Mb/s links with its network interface ports. The 100RIC8 can be configured to be used with either 100BASE-TX or 100BASE-T4 PHY technologies. Larger repeaters may be constructed by cascading DP83858s together using the built-in Inter Repeater bus. In conjunction with a DP83856 100 Mb/s Repeater Infor- mation Base device, a DP83858 based repeater becomes a managed entity that is compatible with IEEE 802.3u (clause 30), collecting and providing an easy interface to all the required network statistics. Features s IEEE 802.3u repeater and management compatible s Supports Class II TX translational repeater and Class I T4 repeater s Supports 8 network connections (ports) s Up to 31 repeater chips cascadable for larger hub appli- cations--may use DP83858 in conjunction with DP83850 100RIC (12 ports per chip) s Separate jabber and partition state machines for each port s Management interface to DP83856 allows all repeater MIBs to be maintained s Large per-port management counters - reduces man- agement CPU overhead s On-chip elasticity buffer for PHY signal re-timing to the DP83858 clock source s Serial register interface - reduces cost s Physical layer device control/status access available via the serial register interface s Detects repeater identification errors s 132 pin PQFP package System Diagram Note: The above system diagram depicts the repeater configured in 100BASE-TX mode. DP83856 100 Mb/s Repeater Information Base (100RIB) DP83223 100BASE-X Transceiver Port 0 100Mb/s Ethernet Ports Inter Repeater Bus RX Enable [7..0] Management Bus MII DP83858 100 Mb/s Repeater Interface Controller (100RIC8) Management I/O Devices Program Memory Management CPU Statistics SRAM DP83840A 100 PHY #0 DP83223 100BASE-X Transceiver Port 1 DP83840A 100 PHY #1 DP83223 100BASE-X Transceiver Port 2 DP83840A 100 PHY #2 DP83223 100BASE-X Transceiver Port 7 DP83840A 100 PHY #7 (IR_COL, IR_DV) DP83858 100 Mb/s TX/T4 Repeater Interface Controller (100RIC8™) June 1998 FAST® is a registered trademark of Fairchild Semiconductor Corporation. TRI-STATE® is a registered trademark of National Semiconductor Corporation. 100RIC™ is a trademark of National Semiconductor Corporation. |
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