manuais Rainbow-electronics DS31256

Rainbow electronics DS31256 Manual do Utilizador (181 páginas)

Marca: Rainbow-electronics | Categoria: Comunicação | Tamanho: 1.19 MB |

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DS31256 Envoy

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256-Channel, High-Throughput

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HDLC Controlle

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TABLE OF CONTENTS

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LIST OF FIGURES

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LIST OF TABLES

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1. MAIN FEATURES

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2. DETAILED DESCRIPTION

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Figure 2-1. Block Diagram

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3. SIGNAL DESCRIPTION

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3.1 Overview/Signal List

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Signal Naming Convention

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Table 3-B. RS Sampled Edge

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Table 3-C. TS Sampled Edge

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3.4 JTAG Signal Description

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3.6 PCI Extension Signals

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4. MEMORY MAP

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4.1 Introduction

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4.6 HDLC Registers (4xx)

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4.7 BERT Registers (5xx)

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4.10 FIFO Registers (9xx)

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5.3 Status and Interrupt

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SM: Status Master Register

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SV54: Status for V54 Detector

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n/a n/a n/a n/a n/a

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0 0 0 0 0 0

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0 0 0 0 0 0 0

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at the PCI bus

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0 = interrupt masked

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6. LAYER 1

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6.1 General Description

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54

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6.4 Receive V.54 Detector

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6.5 BERT

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Figure 6-7. BERT Mux Diagram

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n/a n/a TC

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n/a TC

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7. HDLC

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7.1 General Description

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8. FIFO

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Figure 8-1. FIFO Example

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8.1.1 Receive High Watermark

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8.1.2 Transmit Low Watermark

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9.1 Introduction

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9.2 Receive Side

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9.2.1 Overview

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9.2.2 Packet Descriptors

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9.2.3 Free Queue

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Calculation

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9.2.4 Done Queue

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DS31256

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9.3 Transmit Side

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9.3.1 Overview

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9.3.2 Packet Descriptors

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9.3.3 Pending Queue

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9.3.4 Done Queue

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9.3.5 DMA Configuration RAM

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10. PCI BUS

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10.1.1 PCI Read Cycle

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Figure 10-2. PCI Bus Read

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10.1.2 PCI Write Cycle

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Figure 10-3. PCI Bus Write

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10.1.3 PCI Bus Arbitration

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10.1.4 PCI Initiator Abort

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10.1.5 PCI Target Retry

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10.1.7 PCI Target Abort

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10.2.1 Command Bits (PCMD0)

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10.2.2 Status Bits (PCMD0)

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10.2.3 Command Bits (PCMD1)

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10.2.4 Status Bits (PCMD1)

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Register Name: PLTH1

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11. LOCAL BUS

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11.1 General Description

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11.1.1 PCI Bridge Mode

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LBHE Setting

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11.1.2 Configuration Mode

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Intel Mode (LIM = 0)

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Motorola Mode (LIM = 1)

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12. JTAG

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12.1 JTAG Description

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Figure 12-1. Block Diagram

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12.4 Test Registers

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13. AC CHARACTERISTICS

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ABSOLUTE MAXIMUM RATINGS

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DC CHARACTERISTICS

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(continued)

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14. MECHANICAL DIMENSIONS

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14.1 256 PBGA Package

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15. APPLICATIONS

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