QR0001 Datasheet | National Semiconductor

Description Quick Ring is a point-to-point data transfer architecture designed to facilitate high speed data streams The Quick Ring architecture can be applied both inside the chassis as well as outside the chassis environments to increase data throughput Each QR0001 Quick Ring Controller node in the ring is capable of streaming up to 231 MSamples s per signal line simultaneously including protocol overhead This device is intended for use in applications that handle highbandwidth data streams associated with graphics unpressed video disk arrays high-speed local area networks multiprocessor systems and to interconnect peripherals over a few meters of cable The QR0001 Quick Ring Controller can be used to augment the performance of traditional backplane buses in personal puters workstations and high-end systems The QR0001 is useful for routing high-bandwidth streams in systems that are larger or topologically more plex than bus-based systems Features 160-pin PQFP package 16 node single ring capability Peak theoretical rate over 1 GByte sec for 16 node ring Support for Multi-Ring topologies Error detection detects 1- and 2-bit errors RING INTERFACE Y Precision PLL captures data at 231 MSamples s max Y 33 MHz maximum ring clock frequency Y Low Voltage Differential Signaling (LVDS) ring interface (IEEE P1596 3) CLIENT INTERFACE Y 132 MBytes s data transfer rate at both Tx and Rx ports Y 32-bit transmit and receive data ports Y Readable internal diagnostic register Y TTL signal interface Block Diagram TL F 11928 - 1 Quick Ring TM is a trademark of Apple puter Incorporated C1995 National Semiconductor Corporation TL F 11928 RRD-B30M75 Printed in U S A Table of Contents 10 20 30 31 32 33 34 35 SIGNAL DESCRIPTION BASIC STRUCTURE CLIENT INTERFACE Type and Symbol Fields at the Client Ports Client Transmit Port Transmit Port Timing Relationships Client Receive Port Receive Port Timing Relationships 3 5 1 Client Receive Port Interface Remendations (PIPE asserted)...