DP83924BVCE
Quad 10 Mb/s Ethernet Physical Layer - 4TPHY™
s Programmable MAC Interface supports most
standard 7 signal MAC interfaces
The DP83924B Quad 10Mbps Ethernet Physical Layer
s Twisted Pair Transceiver Module
(4TPHY) is a 4-Port Twisted Pair PHYsical Layer Trans– On-chip filters for transmit outputs
ceiver that includes all the circuitry required to interface
four Ethernet Media Access Controllers (MACs) to
– Low Power Driver
10BASE-T. This device is ideally suited for switch hub
– Heartbeat and Jabber Timers
applications where 8 to 32 ports are commonly used.
– Link Disable and Smart Receive Squelch
The 4TPHY has three dedicated 10Base-T ports. There is
– Polarity detection and correction
an additional port that is selectable for either 10Base-T or
– Jabber Enable/Disable
for an Attachment Unit Interface (AUI). In 10Base-T mode,
any port can be configured to be Half or Full Duplex.
– Isolate mode for diagnostics
(Continued)
– Low Power Class AB Attachment Unit Interface (AUI)
Driver for one port
Features
– Enhanced Supply Rejection
s 100 pin package
– Enhanced Jitter Performance
s 10BASE-T and AUI interfaces
– Diagnostic Endec Loopback
s Automatic or manual selection of twisted pair or Attach– Squelch on Collision and Receive Pair
ment Unit Interfaces on port 1
s Serial LED interface for LINK, POLARITY, ACTIVITY,
s Direct Interface to NRZ Compatible controllers
and ERROR.
s IEEE 802.3u Auto-Negotiation between 10Mb/s Full
s JTAG Boundary Scan per IEEE 1149.1
and Half Duplex data traffic and parallel detection
s MII-like Serial management interface for configuration
and monitoring of ENDEC/Transceiver operation.
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General Description
ISOLATION
10BASE-2
DP8392C
O
10BASE-T
ISOLATION
System Diagram
MAC Serial
NRZ Interface
RXD4,RXC4,COL4,CRS4
TXD4,TXE4
TPI
RXD3,RXC3,COL3,CRS3
TXD3,TXE3
ports 1-4
RXD2,RXC2,COL2,CRS2
DP83924B
AUI
TXD2,TXE2
MAC
RXD1,RXC1,COL1,CRS1
TXD1,TXE1
(port 1 option)
TXC
MDIO
MDC
Serial Mgmt Interface
4TPHY™ is a trademark of National Semiconductor Corporation.
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 1998 National Semiconductor Corporation
www.national.com
DP83924BVCE Quad 10 Mb/s Ethernet Physical Layer - 4TPHY™
October 1998
