NAVI ä Standard

VESA=

Video Electronics Stan= dards Association

860 Hillview Court, Suite 150 = &nb= sp; = &nb= sp; = Phone: (408) 957-= 9270

Mil= pitas, CA 95035 = &nb= sp; = &nb= sp; = &= nbsp; Fax: (408) 957-9277

VESA New Analog Video Interface

Version = 1<= o:p>

July 30, 2004

Purpose

This proposal defines new features and functionali= ty for both the existing (VGA) analog interface, as well as defining how these= may be implemented on later, higher-performance interface systems. It also = defines a new compact connector for providing this high-performance analog interface and a standard digital video interface for PDAs, notebooks, and similar portable appliances. This new interface definition is intended to be usable for PC, information appliance, and consumer electroni= cs applications.

Summary

In recent years, various attempts have been made to define digital interfaces as a replacement for the existing analog RGB disp= lay connections provided by the “VGA” and similar connector systems. These efforts have faced significant problems due to the very large install= ed base of the traditional VGA interface.&nbs= p; This specification defines a means for adding many of the features of existing digital interface standards -&nbs= p; such as improved performance on fixed-format displays, data communications, and content protection – to existing analog and mixed analog/digital interface standards, such as the “VGA” (15-pin high-density D-subminiature connector). One completely new connector, the V= ESA NAVI-D (for “NAVI-Desktop”), is also defined by this standard.<= /p>

Table of Contents

Preface

Intellectual Property Statement.................................................................= ................................... .3

Trademarks.......= ...........................................................................= ................................................. 3

Patents..........= ...........................................................................= .................................................... .3

Other Documents Referenced By This Standard..........................................= .................................. 4

Support For This Standard...................................................................= ......................................... 4

List of Figures..........................................= ...........................................................................= .... 3

1. &= nbsp; Overview.= ...........................................................................= .............................................. 7

2. &= nbsp; Analog Interface – Electrical Specificatio= ns......................................... = 8

2.1 &nbs= p; Video Signals..........................................= ......................................................................... <= /span>9

2.1.1 Signal Amplitude and Video System Impedance..........................................= ..................... 9

2.2 &nbs= p; Synchronization Signals= ..........................................= .............................................. 10

2.2.1 Horizontal Sync Signal Impedance/Termination...........................................= ................. 10

2.3 &nbs= p; Sampling Clock Reference Signal..............................= ......................................... 10

2.3.1 Sampling Clock Reference and HSYNC combination..........................................= ........... 10

2.3.2 Sampling Clock Reference Signal Frequency, Active Edge, and Duty Cycle................= .. 11

2.3.3 Sampling Clock Reference Signal Amplitude..........................................= ....................... 11

2.3.4 Sampling Clock Reference Signal Rise/Fall Time; = Other Parameters..........................= ... 11

2.3.5 NAVI_ENABLE Signal Requirements.................................................................= ............ 12

2.3.6 HSYNC Drive Disabling...............................................................= .................................. 12

2.4 &nbs= p; Amplitude References; Amplitude Reference Pulse...........= .......................... 13

2.4.1 Amplitude Reference Pulse Amplitude, Duration, a= nd Position............................= .......... 13

2.4.2 ARP Signal Characteristics.................................................................= ........................... 13

2.4.3 Detection of ARP by Display.................................................................= ......................... 13

2.5 &nbs= p; Active Video Location P= ulses..........................................= ...................................... 15

2.5.1 AVL Pulse Amplitude, Duration, and Positions..........................................= .................... 15

2.5.2 Other Requirements for AVL Pulses..........................................= ..................................... 15

2.5.3 AVL Pulses in Interlaced Operation..........................................= ..................................... 15

2.6 &nbs= p; Serial Data Transmissio= n, Type 1..............................= ............................................ 17

2.6.1 Type 1 Serial Data Transmission; Rates and Durat= ion of Transmissions.......................= 18

2.6.2 Transmission Start Time Restriction..........................................= ..................................... 19

2.6.3 Transmission Stop Time Restriction..........................................= ..................................... 19

2.6.4 Restrictions - Type 1 Support in Displays..........................................= ............................ 19

2.6.5 Transmission Header and Format; CRCs (Cyclic Redundancy Checks)..................= ...... 19

2.6.6 Standard Secondary Header Codes.................................................................= .............. 22

2.6.7 Type 2 Channel Control Secondary Header Codes..........................................= ............. 25

2.6.8 Content Protection Control Secondary Header Code= s..........................................= ......... 29

2.6.9 Mode D Control Secondary Header Codes..........................................= ......................... 29

2.6.10 Display-to-Host Serial Data Timing..........................................= ..................................... 32

2.7 &nbs= p; Serial Data Transmissio= n, Type 2...................................= ....................................... 33

2.7.1 Type 2 Serial Data Transmission.................................................................= .................. 34

2.7.2 Type 2 CRC (Cyclic Redundancy Check)..........................................= ............................. 35

3. &= nbsp; Digital Video Transmission (NAVI Mode D)..........................................= ......... 36

3.1 &nbs= p; Basic NAVI Mode D Opera= tion..........................................= ........................................ 36

3.1.1 Mode D Encoding.....................................................................= ..................................... 37

3.1.2 Mode D Signal Requirements.................................................................= ....................... 38

3.1.3 Initiation and Cessation of Mode D Transmission<= span style=3D'mso-tab-count:1 dotted'>..........................................= ............... 38

3.1.4 Mode D Transmission Rate Requirements/Limits and= Data Capacity............................= . 38

3.1.5 Mode D Checksum.....................................................................= .................................... 39

3.1.6 Digital Packet Video Link Operation with NAVI Mo= de D..........................................= ..... 39

4. &= nbsp; Supplemental Interfaces and Functions..........................................= ........... 40

4.1 &nbs= p; Display Data Channel..........................................= ..................................................... 40

4.2 &nbs= p; Power.................................................................= ............................................................... 40

4.2.1 Mandatory/Option Support Requirements..........................................= ........................... 40

4.2.2 Power Specifications; Over-Current & Short-C= ircuit Protection..........................= ......... 42

4.2.3 Directionality Control in Bi-Directional Systems= ..........................................= ................. 43

4.3 &nbs= p; Hot Plug Detect..........................................= ................................................................. 43

4.3.1 Basic HPD Functionality.................................................................= .............................. 43

5. &= nbsp; Physical Implementation I – NAVI on the VGA connector (NAVI-V) = PAGEREF _Toc79308956 \h <= ![endif]-->45

5.1 &nbs= p; Physical Connector..........................................= ......................................................... PAGEREF _Toc79308957 \h 45

5.2 &nbs= p; NAVI-V Pinout..........................................= ....................................................................... 45

6. &= nbsp; Physical Implementation II – The NAVI-Desk= top (NAVI-D) Connector = PAGEREF _Toc79308959 \h <= ![endif]-->46

6.1 &nbs= p; Physical Connector..........................................= ......................................................... PAGEREF _Toc79308960 \h 46

6.2 &nbs= p; Pin Assignments..........................................= .................................................................. <= /span>46

7. &= nbsp; Use of the NAVI System with Alternate Color Encodings (“CE Usage= 221;) 47

7.1 &nbs= p; Alternate Color Encoding Support and Defaults................= ...................... 47

7.2 &nbs= p; Alternate Video Channel Assignments.........................= ................................... 47

6.1 Physical Connector Specification..........................................= ...................... 45

6.2 Pin Assignments.....................= ...........................................................................= ...... 46

7. U= SE of the NAVI system with alt. color encodings (“CE” usage)........ 47

List of Figures

Fig. 2-1– HSYNC and clock reference combination..........................................= .......................... 11

Fig. 2-2– Amplitude Reference Pulse(ARP)specificat= ions..........................................= .................. 14

Fig. 2-3 – Active Video Location (AVL) pulses..........................................= .................................. 16

Fig. 2-4 – Type 1 Serial Data Transmission..........................................= ...................................... 18

Fig. 2-5 – CRC Generator..............................................................= ............................................. 21

Fig. 2-6 – Type 2 Serial Data Transmission..........................................= ...................................... 33

Fig. 3-1 – Basic NAVI Mode D Operation..........................................= ......................................... 35

Fig. 5-1 – NAVI-V Connector & Pinout..........................................= ............................................. 45

Fig. 6-1 – NAVI-D Connector & Pinout..........................................= ............................................ 46

Intellectual Property<= /span>

While every precaution has been taken in the preparation of this standard, the Vi= deo Electronics Standards Association and its contributors assume no responsibi= lity for errors or omissions, and make no warranties, expressed or implied, of functionality or suitability for any purpose.

Trademarks<= span style=3D'font-size:14.0pt;mso-bidi-font-size:10.0pt'>

All trademarks used within this document are the property of their respective owners.

VESA, DDC, E-DDC, EDID, E-EDID, P&D, VSIS and NAVI are trademarks of the Video Electronics Standards Association.

I²C is a trademark owned by Philips.

USB and/or Universal Serial Bus are trademarks owned by USB Implementers Forum,= Inc.

MicroCross is a trademark owned by Molex, Inc.

Patents

VESA proposals and standards are adopted by the Video Electronics Standards Association without regard as to whether their adoption may involve any pat= ents or articles, materials, or processes. Such adoption does not assume any liability to any patent owner, nor does it assume any obligation whatsoever= to parties adopting the proposals or standards documents.

As of this writing, several companies are known to hold patents or other intellectual property relating to the interface operation and specifications contained within this proposal. These include, but are not necessarily limited to, the following. The holder of the intellectual property in question should in each case be contacted for information regarding the licensing of such property as it ma= y be necessary to implement various portions of the interface system described in this standard.

Hewlett-Packard Co. Methods and protocols relating to the advanced analog interface features, including= the sampling clock reference transmission, active video detection and gain cont= rol, data transmission, and analog interface content protection features as described in this proposal, and the “Mode D” transmission syste= m.

Molex, Inc. = ; &n= bsp; The “MicroCross”Ô and contact technology/designs used in the “NAVI-D” connector described in = this proposal.

Silicon Image, Inc.&nb= sp; = Unspecified intellectual property.

Other Documents Refere= nced

Several other standards and specificati= ons are referenced by this standard, and their requirements may be considered a part of this specification as indicated herein. These include the following, listed along with the controlling group or authority in each case:

VESA Enhanced Display Data Channel (E-D= DC) Standard, Version 1.1, March 24, 2004

VESA Enhanced Extended Display Identifi= cation Data Standard (E-EDID), Rel. A, Rev. 1, Feb. 9,= 2000

VESA Monitor Command Control Set (MCCS), Version 2, October 17, 2003

VESA Video Signal Standard (VSIS), Vers= ion 1, Rev. 2, December 12, 2002

VESA Digital Packet Video Link (DPVL) proposal, Version 1, April 18, 2004

Universal Serial Bus 2.0 Specification = (USB Implementer’s Forum, Inc.)

Support for this Stand= ard

Clarifications and application notes to support this standard may be written. To obtain the latest standard and any support documentation, contact VESA.

If you have a product which incorporates any variant o= f the NAVI system, you should ask the company that manufactured your product for = assistance. If you are a manufacturer, VESA can assist you with any clarification you m= ay require. All comments or reported errors should be submitted in writing to = VESA using one of the following methods.

· Fax &nb= sp; : &= nbsp; 408-957 9277, direct this note to Technical Support at VESA

· e-mail: = ; support@vesa.org

· mail: &= nbsp; Technical Support

&nbs= p; &= nbsp; Video Electronics Standards Association

&= nbsp; 860 Hillview Court, Suite 150

&= nbsp; Milpitas, CA 95035

<= span style=3D'font-size:14.0pt;mso-bidi-font-size:10.0pt'>Revision History=

July 30, 2004&nb= sp; Initial release of the standard

Acknowledgments=

This document would not have been possible without the effor= ts of the VESA Display Committee’s NAVI Workgroup. In particular, the following individuals and their companies contributed significant time and knowledge to this edition of the VESA NAVI document.

Don Chambers &nbs= p; Cables To Go

Joe Goodart = Dell

Jim Webb &n= bsp; = ; Genesis Microchip

Bob Myers &= nbsp; Hewlett-Packar= d &= nbsp; Document Editor

Susan Luerich = IBM

Eric Wogsberg = Jupiter Systems

Brad Garofalo = National Semiconductor

George Wiley &nbs= p; Qualcomm

Ian Miller = &nb= sp; Samsung

Alain d’Hautecourt ViewSonic = &nb= sp; Workgroup Leader

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1. = Overview

VESA’s New Analog Video Interface standar= d was developed in response to a desire on the part of many VESA members to provi= de the advantages of current “digital” interfaces, while not requi= ring an interface which is completely incompatible with the installed base of an= alog (“VGA” and other) video systems. The NAVI standard achieves this by adding features and functionality to the existing analog video signal set, = in such a way that compatibility with VGA and similar interfaces is maintained. The result is an interface which provides excellent support for both CRT and non-CRT (fixed-format) display devices, and a clear growth path from the existing V= GA standard connector through new types providing improved performance and form factors. In addition, the NAVI interface also provides a true “digital” mode, enabling digital video transmissions (and ultimately, the support of advanced digital-only functionality such as packetized video, compres= sion and encryption, etc.) on this same basic VGA-compatible physical and electr= ical interface.

To understand how this is possible, it is first necess= ary to realize that many of the advantages of the “digital” interface systems have very little, if anything, to do with the fact that the data is being conveyed in “digital” form. The primary advantages of these sy= stems with fixed-format displays comes from the addition of signals which could a= lso be of use in an analog video system – the transmission of a data samp= ling clock (“pixel clock”), and additional signals (generically refe= rred to as a “display enable”) which clearly identify the start and = stop of active video. The traditio= nal analog interface systems, with their roots in CRT-based display systems, ha= ve to date not provided such signals, and so have been difficult to use with fixed-format displays such as the LCD.&nbs= p; The NAVI system corrects this, and adds support for these features to the existing VGA interface as well as defining how these may be added to ne= wer interface definitions.

The NAVI standard also defines several additional feat= ures which greatly enhance the usefulness of the traditional analog interface in modern systems. First, two levels of serial data transmission, using the existing connections of the VGA interface, are defined by this specificatio= n, including a medium-speed bi-directional communications protocol. These provide support for digital = audio transmission from the host system to the display, as well as enabling a content-protection system to be optionally supported in NAVI-compliant devi= ces. There is also support for automatic compensation for cable losses and skew, again significantly improving the performance of the basic analog interface. In addition, an op= tional “true digital” mode (NAVI Mode D) is defined, which takes advan= tage of the basic NAVI enhancements and an AM digital encoding scheme to transmit digital information in the 2-5 Gbit/second rang= e, a capacity equal to that of existing digital interface standards and more than adequate to support advanced video standards such as the VESA Digital Packet Video Link (DPVL) specification. This is achieved while keeping the physical and electrical interfaces fully VGA-compatible and capable of supporting unmodified “legacy” VGA devices.

Within the NAVI system, three standard connectors are = defined at this time. First, the use = of the NAVI features on the standard “VGA” (15-pin HD) connector is defined; this provides the functionality described above for systems which = also wish to retain complete compatibility with the existing analog video interf= ace. This is referred to as the “NAVI-V” (for “VGA”) implementation. Also, a new connector has been def= ined, providing the NAVI functionality with additional features and improved performance in new physical form factors.&= nbsp; The “NAVI-D” (for Desktop) is intended to be the standard connector for desktop systems and monitors, and similar larger equipment. It provides greatly improved analog signal performance (and support for faster operation in the digital NAVI Mo= de D) as compared with the VGA connector, as well as support for added features such as power.

With the added functionality, and especially the suppo= rt for digital audio and video transmission and content protection on both the ana= log and digital display interfaces, it is expected that the NAVI definition may also be very attractive for use in consumer electronics applications, such = as televisions, VCRs, set-top converter boxes, and similar appliances. To make the system better suited t= o such use, this standard also defines the use of optional color encoding methods (such as composite video, Y/C video, and YUV) on the various NAVI implementations.