DP83924BVCE Datasheet, PDF (1/42 Pages) National Semiconductor (TI) – Quad 10 Mb/s Ethernet Physical Layer - 4TPHY™

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.
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
System Diagram
MAC Serial
NRZ Interface
10BASE-T
10BASE-2
TPI
ports 1-4
DP83924B
AUI
(port 1 option)
RXD4,RXC4,COL4,CRS4
TXD4,TXE4
RXD3,RXC3,COL3,CRS3
TXD3,TXE3
RXD2,RXC2,COL2,CRS2
TXD2,TXE2
RXD1,RXC1,COL1,CRS1
TXD1,TXE1
TXC
MDIO MDC
Serial Mgmt Interface
4TPHY™ is a trademark of National Semiconductor Corporation.
TRI-STATE^® is a registered trademark of National Semiconduct or Corporation.
© 1998 National Semiconductor Corporation
MAC
www.national.com