Motorola Quadra 660AV Informações Técnicas

March 1994Developer Press© Apple Computer, Inc. 1994Developer NoteMacintosh DAV Interface for NuBus Expansion CardsMacintosh Quadra 660AVMacintosh Qua

x PREFACE You can contact APDA electronically in these ways: Other Publications 0 The following documents are available from the organizations list

xi PREFACE IMPORTANT A note like this contains important information that you should read before proceeding. ▲ Standard Abbreviations 0 Abbreviatio

xii PREFACE FIFO first-in, first-outGND groundIEEE Institute of Electrical and Electronics EngineersI/O input/outputMUNI Macintosh Universal NuBus Int

CHAPTER 1 The DAV Interface 1Figure 1-0Listing 1-0Table 1-0 Thi d t t d ith F M k 4 0 4

CHAPTER 1 The DAV Interface 2 Macintosh Quadra Implementation The Macintosh DAV interface is supported by a single internal connector that is separat

CHAPTER 1 The DAV InterfaceMacintosh Quadra Implementation 3 Figure 1-1 Macintosh Quadra 660 AV expansion card mounting The MUNI (Macintosh Universa

CHAPTER 1 The DAV Interface 4 Macintosh Quadra Implementation The DAV connector in both the Macintosh Quadra 660 AV and 840 AV is a 40-pin model KE

CHAPTER 1 The DAV InterfacePower Macintosh Implementation 5 Power Macintosh Implementation 1 In the Power Macintosh 7100/66 AV and 8100/80 AV compu

CHAPTER 1 The DAV Interface 6 Power Macintosh Implementation Figure 1-4 shows the location of the DAV connector on the Power Macintosh AV card. Dimen

CHAPTER 1 The DAV InterfacePower Macintosh Implementation 7 The DAV connector on the Power Macintosh AV card is a 60-pin type, AMP model 104549-8 or

Apple Computer, Inc.© 1994, Apple Computer, Inc.All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or t

CHAPTER 2 Audio Interface 2Figure 2-0Listing 2-0Table 2-0 Thi d t t d ith F M k 4 0 4

CHAPTER 2 Audio Interface 10 External Audio Signals Macintosh computers whose model designations end in AV support high-quality 16-bit stereo sound

CHAPTER 2 Audio InterfaceSound Processing 11 Sound Processing 2 Macintosh Quadra 660 AV and 840 AV computers process sound with a 16-bit digital so

CHAPTER 2 Audio Interface 12 Sound Frames Sound Frames 2 The sound codecs in the Macintosh Quadra and Power Macintosh models covered by this note ope

CHAPTER 2 Audio InterfaceSound Frames 13 As shown in Figure 2-2, a frame sync is marked by a pulse two AwacClk cycles wide; a word sync is marked by

CHAPTER 3 Video Interface 3Figure 3-0Listing 3-0Table 3-0 Thi d t t d ith F M k 4 0 4

CHAPTER 3 Video Interface 16 Macintosh Quadra Video Circuits Macintosh computers whose model designations end in AV support video I/O, including co

CHAPTER 3 Video InterfaceMacintosh Quadra Video Circuits 17 be either 1 MB or 2 MB; in the Macintosh Quadra 660 AV it is limited to 1 MB. The VRAM i

iiiContents Figures and Tables v Preface About This Developer Note viiContents of This Note viiiSupplementary Documents viiiApple Publications viiiOt

CHAPTER 3 Video Interface 18 Power Macintosh Video Circuits The input signal, which may be analog composite or S-video in NTSC, PAL, or SECAM format,

CHAPTER 3 Video InterfaceVideo Processing Chips 19 The Power Macintosh video and graphics I/O system differs from the Macintosh Quadra system, descri

CHAPTER 3 Video Interface 20 Video Processing Chips supports mixing video with still graphics, even with different color depths supports both Tru

CHAPTER 3 Video InterfaceUser Interface to Video I/O 21 Endeavor Clock 3 The Endeavor is a programmable video clock chip used in the Macintosh Quad

CHAPTER 3 Video Interface 22 Video Monitor Support * With a color depth of 16 bits in these configurations, the maximum video window size is limited.

CHAPTER 3Video InterfaceVideo Data Characteristics 23Video Data Characteristics 3This section describes the characteristics of video data in Macintosh

CHAPTER 3Video Interface24 Video Data CharacteristicsMode 1, in which the expansion card uses clock and synchronization signals from the system, may o

CHAPTER 3Video InterfaceVideo Data Characteristics 25If an external video signal is present during mode 1b, the decoder ignores it. If it is necessary

CHAPTER 3Video Interface26 Video Data CharacteristicsData Organization 3Digital video data is organized internally into lines and fields. A video line

CHAPTER 3Video InterfaceVideo Data Characteristics 27Regardless of whether video data comes from the Macintosh system or from an expan-sion card, each

iv Video Data Characteristics 23Transfer Modes 23Mode Switching 24Data Organization 26Control Timing 27 Glossary 29 Index 31

CHAPTER 3Video Interface28 Video Data CharacteristicsThe parameter values shown in Figure 3-6 must conform to the timing limits shown in Table 3-6. B

29analog-to-digital converter (ADC) Circuitry that measures analog electrical levels and delivers the results as digital data. APDA Apple’s worldwide

GLOSSARY 30MC68040 The Motorola microprocessor chip used in Macintosh Quadra computers. Mickey A video encoder that produces composite and S-video ou

31 Index A abbreviations xiAPDA ix to xAudioVision display 21audio waveform amplifier and converter (AWAC) chip 10 to 11AV card 5, 6, 19 B burst trans

INDEX 32 random-access memory for 16, 19timing 27 to 28transfer modes 23 to 25video data path chip (VDC) 17, 20video frame buffer 17 Y YUV format 18,

THE APPLE PUBLISHING SYSTEM This Apple manual was written, edited, and composed on a desktop publishing system using Apple Macintosh computers and Fr

v Figures and Tables Chapter 1 The DAV Interface 1 Figure 1-1 Macintosh Quadra 660AV expansion card mounting 3 Figure 1-2 Card with DAV connector for

vii PREFACE About This Developer Note This developer note describes the electrical interface for the digital audio and video signals that certain Ma

viii PREFACE Contents of This Note 0 This developer note is divided into three chapters: Chapter 1, “The DAV Interface,” describes the general mec

ix PREFACE Technical Introduction to the Macintosh Family, second edition, surveys the complete Macintosh family of computers from the developer’s