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DP83924 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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DP83924 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 42 page  © 1998 National Semiconductor Corporation www.national.com October 1998 DP83924BVCE Quad 10 Mb/s Ethernet Physical Layer - 4TPHY™ General Description The DP83924B Quad 10Mbps Ethernet Physical Layer (4TPHY) is a 4-Port Twisted Pair PHYsical Layer Trans- ceiver that includes all the circuitry required to interface four Ethernet Media Access Controllers (MACs) to 10BASE-T. This device is ideally suited for switch hub applications where 8 to 32 ports are commonly used. The 4TPHY has three dedicated 10Base-T ports. There is an additional port that is selectable for either 10Base-T or for an Attachment Unit Interface (AUI). In 10Base-T mode, any port can be configured to be Half or Full Duplex. (Continued) Features s 100 pin package s 10BASE-T and AUI interfaces s Automatic or manual selection of twisted pair or Attach- ment Unit Interfaces on port 1 s Direct Interface to NRZ Compatible controllers s IEEE 802.3u Auto-Negotiation between 10Mb/s Full and Half Duplex data traffic and parallel detection s MII-like Serial management interface for configuration and monitoring of ENDEC/Transceiver operation. System Diagram AUI TPI MAC Serial NRZ Interface 10BASE-T DP83924B 10BASE-2 Serial Mgmt Interface TXD4,TXE4 RXD4,RXC4,COL4,CRS4 (port 1 option) MAC TXD3,TXE3 RXD3,RXC3,COL3,CRS3 TXD2,TXE2 RXD2,RXC2,COL2,CRS2 TXD1,TXE1 RXD1,RXC1,COL1,CRS1 TXC ports 1-4 MDIO MDC s Programmable MAC Interface supports most standard 7 signal MAC interfaces s Twisted Pair Transceiver Module – On-chip filters for transmit outputs – Low Power Driver – Heartbeat and Jabber Timers – Link Disable and Smart Receive Squelch – Polarity detection and correction – Jabber Enable/Disable – Isolate mode for diagnostics – Low Power Class AB Attachment Unit Interface (AUI) Driver for one port – Enhanced Supply Rejection – Enhanced Jitter Performance – Diagnostic Endec Loopback – Squelch on Collision and Receive Pair s Serial LED interface for LINK, POLARITY, ACTIVITY, and ERROR. s JTAG Boundary Scan per IEEE 1149.1 4TPHY™ is a trademark of National Semiconductor Corporation. TRI-STATE® is a registered trademark of National Semiconduct or Corporation. |
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