DP83850C Datasheet | National Semiconductor

Description Features The DP83850C 100 Mb/s TX/T4 Repeater Interface Con- s IEEE 802.3u repeater and management patible troller, known as 100RIC, is designed specifically to meet s Supports Class II TX translational repeater and Class I the needs of today's high speed Ethernet networking sys T4 repeater tems. The DP83850C is fully patible with the IEEE s Supports 12 network connections (ports) 802.3 repeater's clause 27. s Up to 31 repeater chips cascadable for larger hub appli The DP83850C supports up to twelve 100 Mb/s links with cations (up to 372 ports) its network interface ports. The 100RIC can be configured s Separate jabber and partition state machines for each to be used with either 100BASE-TX or 100BASE-T4 PHY port technologies. Larger repeaters with up to 372 ports may be constructed by cascading DP83850Cs together using s Management interface to DP83856 allows all repeater the built-in Inter Repeater bus. MIBs to be maintained In conjunction with a DP83856 100 Mb/s Repeater Infor- s Large per-port management counters - reduces management CPU overhead mation Base device, a DP83850C based repeater bees a managed entity that is patible with IEEE s On-chip elasticity buffer for PHY signal re-timing to the 802.3u (clause 30), collecting and providing an easy inter DP83850C clock source face to all the required network statistics. 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 100 Mb/s Repeater Interface Controller (100RIC8) Inter Repeater Bus Management Bus RX Enable [11..0] MII DP83840A 100 PHY #0 DP83223 100BASE-X Transceiver Port 0 DP83840A 100 PHY #1 DP83223 100BASE-X Transceiver Port 1 DP83840A 100 PHY #2 DP83223 100BASE-X Transceiver Port 2 DP83840A 100 PHY #11 DP83223 100BASE-X Transceiver Port 11 DP83856 100 Mb/s Repeater Information Base (100RIB) (TXD[3:0], TX_ER,...