Original Creation Date: 10/24/94

Last Update Date: 02/24/99

Last Major Revision Date: 10/24/94

MNDP83950B-VQB REV 0B0

MICROCIRCUIT DATA SHEET

REPEATER INTERFACE CONTROLLER

General Description

The "RIC" may be used to implement an IEEE 802.3 multiport repeater unit including the

functions defined by the repeater, segment partition, and jabber lockup protection state

machines.

The RIC has an on-chip phase-locked-loop (PLL) for Manchester data decoding, a Manchester

encoder, and an Elasticity Buffer for preamble regeneration.

Each RIC can connect to 13 cable segments via its network interface ports. One port is

fully AUI compatible and is able to connect to an external MAU using the maximum lenght of

AUI cable. The other 12 ports have integrated 10BASE-T transceivers. These transceiver

functions may be bypassed so that the RIC may be used with external transceivers. In

addition, large repeater units, containing several hundred ports may be constructed by

cascading RICs together over an Inter-RIC bus.

The RIC is configurable for specific applications. It provides port status information for

LED array displays and a simple interface for system processors. The RIC posseses

multi-function counter and status flag arrays to facilitate network statistics gathering.

A serial interface, known as the Management Interface is available for the collection of

data in Managed Hub applications.

NS Part Numbers

DP83950BVQB-MPC

Industry Part Number

DP83950BVQB

Prime Die

DP63950

Processing

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Quality Conformance Inspection

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Subgrp Description

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