DP83950BVQB ,RIC⑩ Repeater Interface ControllerFUNCTIONAL DESCRIPTIONagement Interface is available for the collection of data inManaged Hub
DP83950BVQB ,RIC⑩ Repeater Interface ControllerDP83950BRICRepeaterInterfaceControllerOctober1995TMDP83950BRICRepeaterInterfaceControllerYSeparate ..
DP83950BVQB ,RIC⑩ Repeater Interface ControllerBLOCK DIAGRAMfunction counter and status flag arrays to facilitate networkstatistics gathering. A s ..
DP83953VUL ,Repeater Interface Controller with Security Features, Internal Drivers and Integrated FiltersFeatures (RIC II). The RIC2A integrates
DP83950BNU-DP83950BVQB
RIC⑩ Repeater Interface Controller
TL/F/11096
DP83950B
RIC
Repeater
Interface
Controller
October 1995
DP83950B RICTM
Repeater Interface Controller
General Description
The DP83950BRepeater Interface Controller ‘‘RIC’’ maybe
usedto implementan IEEE 802.3 multiport repeater unit.It
fullysatisfiesthe IEEE802.3repeaterspecification including
the functions definedbythe repeater, segment partitionand
jabber lockup protection state machines.
The RIChasan on-chip phase-locked-loop (PLL)for Man-
chester data decoding,a Manchester encoderandan Elas-
ticity Bufferfor preamble regeneration.
EachRICcan connectto13 cable segmentsviaits network
interface ports. Oneportis fullyAUI compatibleandis able connectto anexternal MAU usingthe maximum lengthof
AUI cable. The other12 ports have integrated 10BASE-T
transceivers. These transceiver functions maybe bypassedthattheRIC maybe used with external transceivers,for
example DP8392 coaxial transceivers.In addition, largere-
peater units, containing several hundred ports maybe con-
structedby cascading RICs together overan Inter-RIC bus.
TheRICis configurablefor specific applications.It provides
port status informationfor LED array displaysanda simple
interfacefor system processors. The RIC posseses multi-
function counterand statusflag arraysto facilitate network
statistics gathering.A serial interface, knownasthe Man-
agement Interfaceis availableforthe collectionof datain
Managed Hub applications.
Features Compliantwiththe IEEE 802.3 Repeater Specification13 network connections (ports)per chip Selectable on-chip twisted-pair transceivers Cascadablefor largehub applications Compatible withAUI compliant transceivers On-chip Elasticity Buffer, Manchester encoder andde-
coder Separate partition state machinesfor each port Provides port status informationfor LED displaysin-
cluding: receive, collision, partitionandlink status Power-up configuration options:
Repeater and Partition Specifications, Transceiver Inter-
face, Status Display, Processor Operations Simple processor interfacefor repeater management
and port disable On-chip Event Countersand Event Flag Arrays Serial Management Interfaceto combine packet and
repeater status information together CMOS processforlow power dissipation Single5V supply
Tableof Contents
1.0 SYSTEM DIAGRAM
2.0 CONNECTION DIAGRAM
3.0PIN DESCRIPTIONS
4.0 BLOCK DIAGRAM
5.0 FUNCTIONAL DESCRIPTION
6.0 HUB MANAGEMENT SUPPORT
7.0 PORT LOGIC FUNCTIONS
8.0RIC REGISTER DESCRIPTIONS
9.0AC ANDDC SPECIFICATIONS
10.0AC TIMING TEST CONDITIONS
11.0 PHYSICAL DIMENSIONS
1.0 System Diagram
SimpleRIC Hub
TL/F/11096–1
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C1995National SemiconductorCorporation RRD-B30M16/PrintedinU.S.A.
