DMA2286 datasheet(2/48 Pages) MICRONAS

Part #	DMA2286

Description	DMA 2275, DMA 2286 C/D/D2-MAC Descrambler

Download	48 Pages

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Manufacturer	MICRONAS [Micronas]

Direct Link	http://www.micronas.com

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2 / 48 page

DMA 2275, DMA 2286

2

Contents

Page

Section

Title

4

1.

Introduction

4

1.1.

General Information

4

1.2.

Environment

5

2.

Chip Architecture

6

3.

Video Processor

6

3.1.

Code Converter

6

3.2.

Video Descrambler

6

3.3.

Interpolation Filter

6

3.4.

Clamping and Video Gate

7

4.

PRBS Generator

7

4.1.

Video PRBS Generator

7

4.2.

Packet PRBS Generator

7

4.3.

VBI Descrambler

8

5.

Line 625 Processor

8

5.1.

Majority Decision

8

5.2.

BCH Check

8

5.3.

Frame Counter Flywheel

8

5.4.

RTCI Detector

9

6.

Sound Processor

9

6.1.

The S Bus Interface and the S Bus

10

7.

Packet Processor

10

7.1.

Packet Acquisition

11

7.2.

Packet Descrambler

12

8.

Interface Processor

12

8.1.

Fast Processor

13

8.2.

IM Bus Interface

13

8.2.1.

IM Bus Addresses and Instructions

18

8.3.

DRAM Interface

19

8.4.

DRAM Memory Map

19

8.4.1.

Mode Register

20

8.4.2.

Pac1 Register

21

8.4.3.

Pac2 Register

23

8.4.4.

Coeff Register

24

8.4.5.

CW Register

25

8.4.6.

Error Buffer

26

8.4.7.

Packet Buffer

28

8.4.8.

Line 625 Buffer

29

8.4.9.

Scratch Buffer

29

8.5.

FP Memory Map

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DMA2286 Datasheet(PDF) 2 Page - Micronas

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