EDID1.4 SPEC文字版(Release A revision 2).pdf

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E-EDID™ Standard Phone: (408) 957-9270 Fax: (408) 957-9277 URL: www.vesa.org 860 Hillview Court, Suite 150 Milpitas, CA 95035 VESA ENHANCED EXTENDED DISPLAY IDENTIFICATION DATA STANDARD (Defines EDID Structure Version 1, Revision 4) Release A, Revision 2 September 25, 2006 Purpose The E-EDID Standard defines a remotely readable (read by a source) data file stored in an electronic display. The data in this file identifies the characteristics, features and video timing modes supported by the display product. The purpose of this standard is to describe the BASE (block 0) 128-byte data structure "EDID 1.4" (shorthand for EDID Version 1, Revision 4), as well as the overall layout of the data blocks that make up Enhanced EDID. This document specifies the ELEMENTS, data structures and file formats used to organize and store this data. The contents of this data file are used by a video source to configure its graphics processing unit to generate correctly formatted video for the display and to provide additional information for certain application programs. Summary This revision to the E-EDID Standard adds support for Consumer Electronic Products (Model Year and Aspect Ratio) and PC Products (CVT {Coordinated Video Timing}, Established Timings III, Additional Video Interfaces, Expanded Display Range Limits, optional Product Features and Timing Mode Priorities). This document contains specifications for the mandatory and optional elements of BASE EDID. These data formats are designed to support both computer based products and digital television products. Optional EDID EXTENSIONs are defined in separate VESA & CEA Standards. Note: This document supersedes all previous versions of the EDID and E-EDID Standards. The EDID 1.4 structure is intended to be backward compatible (key ELEMENTS only) with EDID structures 1.0, 1.1, 1.2 and 1.3 as implemented in most commercially available displays. This document contains specifications for the mandatory core ELEMENTS of Enhanced EDID. Optional EDID extensions are defined in separate documents. Use of EDID extensions described in this document requires that the addressing methods described in the E-DDC (Enhanced Display Data Channel) Standard are used. VESA Enhanced EDID Standard ©Copyright 1994 - 2006 Video Electronics Standards Association Release A, Rev.2 Page 1 of 91

Preface Intellectual Property Copyright © 1994 - 2006 Video Electronics Standards Association. All rights reserved. While every precaution has been taken in the preparation of this standard, the Video Electronics Standards Association and its contributors assume no responsibility for errors or omissions, and make no warranties, expressed or implied, of functionality or suitability for any purpose. Trademarks All trademarks used within this document are the property of their respective owners. VESA, DDC, E- DDC, DPMS, DPM, EDID, E-EDID, EVC, P&D, VDIF, GTF, CVT, VTB-EXT, DI-EXT and DisplayPort are trademarks of the Video Electronics Standards Association. I2C is a trademark owned by Philips. Patents VESA draws attention to the fact that it is claimed that compliance with this specification may involve the use of a patent or other intellectual property right (collectively, “IPR”).. VESA takes no position concerning the evidence, validity, and scope of this IPR. Attention is drawn to the possibility that some of the elements of this VESA Specification may be the subject of IPR other than any identified above. VESA shall not be held responsible for identifying any or all such IPR, and has made no inquiry into the possible existence of any such IPR. THIS SPECIFICATION IS BEING OFFERED WITHOUT ANY WARRANTY WHATSOEVER, AND IN PARTICULAR, ANY WARRANTY OF NON-INFRINGEMENT IS EXPRESSLY DISCLAIMED. ANY IMPLEMENTATION OF THIS SPECIFICATION SHALL BE MADE ENTIRELY AT THE IMPLEMENTER’S OWN RISK, AND NEITHER VESA, NOR ANY OF ITS MEMBERS OR SUBMITTERS, SHALL HAVE ANY LIABILITY WHATSOEVER TO ANY IMPLEMENTER OR THIRD PARTY FOR ANY DAMAGES OF ANY NATURE WHATSOEVER DIRECTLY OR INDIRECTLY ARISING FROM THE IMPLEMENTATION OF THIS SPECIFICATION. Support for this Standard 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 EDID, you should ask the company that manufactured your product for assistance. If you are a manufacturer, VESA can assist you with any clarification you may require. All comments or reported errors should be submitted in writing to VESA using one of the following methods. • Phone: • Fax: • E-mail: • Mail: VESA Enhanced EDID Standard ©Copyright 1994 - 2006 Video Electronics Standards Association 408-957 9270 408-957 9277, direct this note to Technical Support at VESA support@vesa.org Technical Support Video Electronics Standards Association 860 Hillview Court, Suite 150 Milpitas, CA 95035 Release A, Rev.2 Page 2 of 91

Conformance Glossary – Definition of Terms The following is a list of definitions for certain keywords used through out this document: shall: A keyword that indicates a mandatory requirement for compliance with this standard. should: A keyword that indicates a choice with a strongly preferred preference – equivalent to “is strongly recommended”. may: A keyword that indicates a choice with no expressed or implied preference. optional: A keyword that denotes items which may or may not be present in a complaint device. required: A keyword that denotes items which are mandatory and shall be present in a compliant device. Conformance Glossary – Definition of Notations The following table defines a list of notations that are used through out this document: Definitions of Notations Definition Subtraction Division Multiplication Addition Is Equivalent To Thru Delineator Binary Number, msb → lsb Hexadecimal Numbers, MSB → LSB Address or Offset Notation - ÷ × + ≡ → / Binary Hex Boldface Hex Hex Contents Bit Contents Example 7 – 3 = 4 9 ÷ 3 = 3 2 x 3 = 6 2 + 3 = 5 A ≡ B 7 → 3 ≡ 7, 6, 5, 4, 3 Offset Pointer or Address (msb) 10010110 (lsb) (MSB) 14 00 0A FF FEh (LSB) 3Fh ≡ is an address located at 3Fh at address 7Ah 4, 3, 6, 4 (14 00 0A FF FE)h Hex Contents at Address [__h] Contents of Bits at Address [__h] [3Fh] ≡ the hex data stored at address 3Fh [Byte 7Ah, bit 1, 0] ≡ Binary data stored in bits 1 & 0 Dec String Hex String String of Decimal Numbers String of Hexadecimal Numbers VESA Enhanced EDID Standard ©Copyright 1994 - 2006 Video Electronics Standards Association Release A, Rev.2 Page 3 of 91

Revision History Release A Initial release of the standard. The body of the standard is derived from the EDID Standard Ver. 3.0. September 2, 1999 February 9, 2000 Release A Revision 1 Consolidate requirements of detailed timing section in section 3.10 Section 3.4 - removed restriction of 00h, 00h, 00h, 00h value for serial number field Table 3.11 - added note to reference preferred timing mode bit requirements Table 3.15 - added note for 1 : 1 AR (aspect ratio) in earlier EDID definitions Table 3.16 – corrected order of bits in Vertical Sync format description Table 3.17 - added definition for stereo flag bits values of 0,0,x Table 3.20 - added clarification to round up Max pixel; clock value Release A Revision 2 September 25, 2006 Preface - Added a Conformance Glossary for definitions of terms and notations. Added a List of Tables. Section 1 Overview - Revised Summary in Section 1.1 and added Scope in Section 1.2. Section 1.5 Reference Documents - Revised list and partitioned into Section 1.5.1 Normative Documents and Section 1.5.2 Reference Documents. Section 2 EDID Structures - Added Table 2.1 History of EDID Structures in Section 2.1; added Table 2.2 Comparison of EDID Structures (defines required, optional and recommended elements of EDID data structures 1.0 to 1.4) and added Section 2.1.7 Compatibility of EDID 1.x Structures. Section 2.2 EDID Extension Blocks - Revised/added the following: Section 2.2.1 Order of EDID Extension Blocks - note that Block Maps are now optional; Section 2.2.2 General Extension Block Format; Section 2.2.3 EDID Block Map Extension and Section 2.2.4 EDID Extension Tags Assigned by VESA. Section 3.1 EDID Format Overview - Updated contents of Table 3.1. Section 3.4.1ID Manufacturer Name - Updated PNPID Contact Information. Section 3.4.4 Week & Year of Manufacture - Added option to declare Model Year. Section 3.6.1 Video Input Definition -Added Color Bit Depth declaration to Digital Video Interfaces and updated Supported Digital Interfaces. Section 3.6.2 H & V Screen Size - Added option to declare Screen Aspect Ratio (Portrait or Landscape) in place of H & V Screen Size. Section 3.6.4 Feature Support Byte - Added Supported Color Encoding Formats; Replaced Preferred Timing Mode (PTM) Bit with PTM includes or does not include Native Pixel Format/Preferred Refresh Rate of the display device and replaced GTF Bit with Continuous or Non-Continuous Frequency Display. Section 3.10 - 18 Byte Descriptors - Changed terminology, formally known as Detailed Timing Descriptor Block. Section 3.10.2 Detailed Timing Descriptor - Added option to include aspect ratio for DTV timing modes; included definitions for Analog Composite, Bipolar Analog Composite, Digital Composite & Digital Separate. Section 3.10.3.3 Display Range Limits - formally known as Monitor Range Limits – increased range by adding optional Display Range Limits Offsets and added optional GTF (default), GTF (secondary curve) & CVT Support Information. Section 3.10.3.7 Color Management Data - Added optional short hand CMD definition. Section 3.10.3.8 3 Byte CVT Codes - Added optional 3 Byte CVT Codes. VESA Enhanced EDID Standard ©Copyright 1994 - 2006 Video Electronics Standards Association Release A, Rev.2 Page 4 of 91

Section 3.10.3.9 Established Timings III - Added optional Established Timings III. Section 3.12 Notes Regarding Borders - Made corrections and updates to the video timing parameter definition drawing. Section 4 EDID Extensions - Updates and corrections were added. Section 5 Timing Information Priority Order - Updates and corrections were added. Section 6 APPENDIX A – Three new sample EDID tables were included. Section 7 APPENDIX B - Added GTF & CVT Compatibility Issues. Section 8 APPENDIX C - Added a Glossary. Section 9 APPENDIX D - Updated FAQ section. Section 10 APPENDIX E - Added ASCII Reference Tables. VESA Enhanced EDID Standard ©Copyright 1994 - 2006 Video Electronics Standards Association Release A, Rev.2 Page 5 of 91

ATI Technologies Chrontel Dell DisplayLabs Hewlett-Packard NVIDIA NVIDIA Philips Samsung Sony Sony Tech Source ViewSonic Task Group Chair & Editor Acknowledgments This document would not have been possible without the efforts of the VESA Display Systems Committee’s EDID Task Group. In particular, the following individuals and their companies have contributed significant time and knowledge. Release A, Rev. 2 Syed Athar Hussain Chi Tai Hong Joe Goodart James R. Webb Bob Myers Gang Han Isaac Yang Glenn Adler Ian Miller Paul Doyle Robert Blanchard Joe Lamm Alain d’Hautecourt Release A, Rev. 1 and/or previous Bill Milford Warren Whaley Joe Goodart Drew Loucks Bob Myers Ton Wang Ian Miller Shaun Kerigan En Anwyl Geoff Gould Rick Stoneking Chuck Scott Anthony Cianfarano Jack Hosek Richard Atanus Anders Frisk Hans van der Ven Glenn Adler John Matsumoto Alain d’Hautecourt Don Panell 3Dfx Canon Dell Elo Touchsystems Hewlett-Packard Hitachi IBM IBM IBM Intel Microchip Technology Microsoft Mitsubishi NEC NEC Nokia Panasonic Philips Toshiba ViewSonic VESA Enhanced EDID Standard ©Copyright 1994 - 2006 Video Electronics Standards Association Release A, Rev.2 Page 6 of 91

Table of Contents Preface.......................................................................................................................................................................... 2 Revision History ........................................................................................................................................................... 4 Release A September 2, 1999................................................................................................................................. 4 Release A Revision 1 February 9, 2000................................................................................................................. 4 Release A Revision 2 September 25, 2006 ............................................................................................................... 4 List of Tables ............................................................................................................................................................... 8 2.2 1.5.1 1.5.2 2.1.1 2.1.2 2.1.3 2.1.4 2.1.5 2.1.6 2.1.7 2.2.1 2.2.2 2.2.3 2.2.4 1. OVERVIEW ...................................................................................................................................................... 10 Summary ......................................................................................................................................................... 10 1.1 1.2 Scope............................................................................................................................................................... 10 1.3 Background ..................................................................................................................................................... 11 Standard Objectives ........................................................................................................................................ 11 1.4 Reference Documents ..................................................................................................................................... 11 1.5 Normative Reference Documents ............................................................................................................ 11 Informative Reference Documents .......................................................................................................... 11 2. EDID STRUCTURES....................................................................................................................................... 13 Base EDID: Past and Present .......................................................................................................................... 13 2.1 EDID 1.0 ................................................................................................................................................. 14 EDID 1.1 ................................................................................................................................................. 14 EDID 1.2 ................................................................................................................................................. 14 EDID 1.3 ................................................................................................................................................. 14 EDID 1.4 ................................................................................................................................................. 14 EDID Structures --- Comparison Table .................................................................................................. 14 Compatibility of EDID 1.x Data Structures --- Handling Updates to EDID Data Structures................ 15 EDID Extension Blocks .................................................................................................................................. 16 EDID Extensions: Order of the Blocks ................................................................................................... 16 EDID Extensions: General Extension Block Format.............................................................................. 17 EDID Extensions: EDID Block Map Extension ...................................................................................... 17 EDID Extension Tags Assigned by VESA ............................................................................................... 18 3. Extended Display Identification Data (EDID) Version 1 Revision 4............................................................ 19 3.1 EDID Format Overview.................................................................................................................................. 19 3.2 Data Format Conventions................................................................................................................................ 20 3.3 Header: 8 Bytes ............................................................................................................................................... 20 3.4 Vendor & Product ID: 10 Bytes...................................................................................................................... 21 ID Manufacturer Name: 2 Bytes ......................................................................................................... 21 ID Product Code: 2 Bytes ....................................................................................................................... 21 ID Serial Number: 4 Bytes ...................................................................................................................... 22 Week and Year of Manufacture or Model Year: 2 Bytes......................................................................... 22 EDID Structure Version & Revision: 2 Bytes................................................................................................. 23 Basic Display Parameters and Features: 5 Bytes............................................................................................. 23 Video Input Definition: 1 Byte................................................................................................................. 23 Horizontal and Vertical Screen Size or Aspect Ratio: 2 Bytes................................................................ 25 Display Transfer Characteristics (Gamma): 1 Byte................................................................................ 26 Feature Support: 1 Byte .......................................................................................................................... 26 3.7 Display x, y Chromaticity Coordinates: 10 Bytes ........................................................................................... 28 Established Timings I & II: 3 bytes................................................................................................................. 29 3.8 3.9 Standard Timings: 16 Bytes ............................................................................................................................ 30 3.10 18 Byte Descriptors - 72 Bytes ....................................................................................................................... 31 3.10.1 The First 18 Byte Descriptor................................................................................................................... 32 3.10.2 Detailed Timing Descriptor: 18 bytes..................................................................................................... 32 3.5 3.6 3.4.1 3.4.2 3.4.3 3.4.4 3.6.1 3.6.2 3.6.3 3.6.4 VESA Enhanced EDID Standard ©Copyright 1994 - 2006 Video Electronics Standards Association Release A, Rev.2 Page 7 of 91

3.10.3.1 3.10.3.2 3.10.3.3 3.10.3 Display Descriptor Definitions - 18 bytes............................................................................................... 36 Display Product Serial Number Descriptor Definition (tag #FFh)................................................................... 37 Alphanumeric Data String Descriptor Definition (tag #FEh)........................................................................... 37 Display Range Limits & Additional Timing Descriptor Definition (tag #FDh)............................................... 38 3.10.3.3.1 Display Range Limits with GTF Secondary Curve Definition:.................................................................. 40 3.10.3.3.2 Display Range Limits with CVT Support Definition:................................................................................. 41 Display Product Name (ASCII) String Descriptor Definition (tag #FCh) ....................................................... 43 3.10.3.4 Color Point Descriptor Definition (tag #FBh).................................................................................................. 43 3.10.3.5 Standard Timing Identifier Definition (tag #FAh) ........................................................................................... 43 3.10.3.6 Color Management Data Definition (tag #F9h) ............................................................................................... 43 3.10.3.7 CVT 3 Byte Code Descriptor Definition (tag #F8h) ........................................................................................ 43 3.10.3.8 Established Timings III Descriptor Definition (tag #F7h) ............................................................................... 43 3.10.3.9 Unused – Reserved Data Tag Number (Tags #11h to #F6h)............................................................................ 43 3.10.3.10 Dummy Descriptor Definition (Tag #10h)....................................................................................................... 43 3.10.3.11 3.10.3.12 Manufacturer Specified Data Tag Numbers (Tags #00h to #0Fh) ................................................................... 43 3.11 Extension Flag and Checksum ........................................................................................................................ 43 3.12 Note Regarding Borders.................................................................................................................................. 43 4. EDID Extensions ............................................................................................................................................... 43 5. Timing Information Priority Order ................................................................................................................ 43 6. APPENDIX A - Sample EDIDs........................................................................................................................ 43 EXAMPLE 1: Sample BASE EDID (Block 0) for an LCD Desktop IT Display ........................................... 43 6.1 6.2 EXAMPLE 2: Sample BASE EDID & CEA861 Extension for a DTV Display ............................................ 43 6.3 EXAMPLE 3: Sample BASE EDID & CEA861 Extension for a IT/DTV Display ....................................... 43 7. APPENDIX B – GTF & CVT Compatibility Issues....................................................................................... 43 8. APPENDIX C - Glossary.................................................................................................................................. 43 9. APPENDIX D - Answers To Commonly Asked Questions ........................................................................... 43 10. APPENDIX E – ASCII Reference Tables ................................................................................................... 43 Tables Table 2.1 - EDID Structures – History........................................................................................................................ 13 Table 2.2 - EDID Structures – Comparison Table ...................................................................................................... 15 Table 2.3 - EDID Structures – Comparison Table - Key ............................................................................................ 15 Table 2.4 – E-EDID High Level Layout..................................................................................................................... 16 Table 2.5 - EDID Structure – General Extension Block Format................................................................................. 17 Table 2.6 - EDID Structure – Block Map Extension .................................................................................................. 17 Table 2.7 - EDID Structure – Extension Tag Numbers .............................................................................................. 18 Table 3.1 - EDID Structure Version 1, Revision 4 ..................................................................................................... 19 Table 3.2 - Data Format Conventions ......................................................................................................................... 20 Table 3.3 - EDID Header Format................................................................................................................................ 20 Table 3.4 – Vendor & Product ID Structure ............................................................................................................... 21 Table 3.5 - ID Manufacturer Name............................................................................................................................. 21 Table 3.6 – ID Product Code....................................................................................................................................... 21 Table 3.7 - ID Serial Number...................................................................................................................................... 22 Table 3.8 – Week & Year of Manufacture or Model Year ......................................................................................... 22 Table 3.9 - EDID Structure Version and Revision Numbers...................................................................................... 23 Table 3.10 - Basic Display Parameters and Features .................................................................................................. 23 Table 3.11 - Video Input Definition............................................................................................................................ 24 Table 3.12 - Horizontal and Vertical Screen Size or Aspect Ratio............................................................................. 25 Table 3.13 – Display Transfer Characteristics (Gamma)............................................................................................ 26 Table 3.14 - Feature Support....................................................................................................................................... 27 Table 3.15 – DPMS vs. DPM --- State Mappings....................................................................................................... 27 VESA Enhanced EDID Standard ©Copyright 1994 - 2006 Video Electronics Standards Association Release A, Rev.2 Page 8 of 91

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