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        =                    =        DPM™ Standard

Video Electronics Standards Association        =             &nb= sp;                   =             &nb= sp;            =             &nb= sp;         

860 Hillview Court, Suite = 150        &= nbsp;           &nbs= p;            &= nbsp;                                  =     Phone: 408-957-9270

Milpitas<= /st1:City>, CA 95035  &nb= sp;            =             &nb= sp;            =             &nb= sp;                               =     FAX: 408-957-9277

 

 

Display Power Management (DPM) Standard

Release A

March 3, 2003

 

 

 

 

 

 

Purpose:

To standardize on a common definition of low power states for the computer dis= play industry.

 

 

Summary:

Government agencies and independent organizations worldwide are involved in setting li= mits or goals for power consumption in office equipment.  Desktop computers are one of the p= rimary targets for this effort.  The display consumes a significant portion of the power used in a desktop compu= ter system

 

 

 

 

Intellec= tual Property

Cop= yright 2003 - Video Electronics Standards Association.  All other rights reserved.

 

While every precaution has been taken in the preparati= on of this standard, the Video Electronics Standards Association and its contribu= tors assume no responsibility for errors or omissions, and make no warranties, expressed or implied, of functionality or suitability for any purpose.

 

Trademarks

All tradema= rks used within this document are the property of their respective owners.  VESA, DPMS and DPM are registered = trademarks of the Video Electronics Standards Association.

 =

Patents

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

 

Support for this Specificatio= n

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

 

If you have a product that incorporates DPM, you shoul= d ask the company that manufactured your product for assistance. If you are a manufacturer, VESA can assist you with any clarification you may require. A= ll comments or reported errors should be submitted in writing to VESA using on= e of the following methods.

 

FAX:   408-957-9277, direct this note to Technical Support at VESA

 

E-mail: support@ve= sa.org

 

Mail:   = ; Technical Support

            Video Electronics Standards Association

            860 Hillview Court, Suite 150

   &nbs= p;        Milpitas, CA 95035

Revision History

 

Release A        March 3, 2003

Initial release of the standard. The body of this standard is derived from t= he Display Power Management Signaling Standard, Version 1.= 0, Revision 1.0 dated August 20, 1993.

 =


Acknowledgments= =

This document was made possible by the joint effort= of members of VESA Display Committee.  In particular, the following individuals and their companies contrib= uted with time and knowledge.

 

DPM Workgroup Leader

Joe Goodart, Dell Computer Corporation

 

Workgroup Members

Bob Myers, Hewlett-Packard Company

Susan Luerich, IBM Corpora= tion

Richard Atanus, NEC-Mitsub= ishi

Ian Miller, Samsung

Don Chambers, Total Technologies Ltd.

Alain d’Hautecourt, = ViewSonic

 

 

 

Table of Contents

 

 TOC \o Introduction and Scope=   &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;          <= !--[if supportFields]> = PAGEREF _Toc20211636 \h <= ![endif]-->6=

1.1           Purpose            =             &nb= sp;            =             &nb= sp;            =             &nb= sp;            =             &nb= sp;            =           6

1.2           Activation Criteria        &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p; 6

1.3           Computer Systems Supported      &n= bsp;            = ;            &n= bsp;            = ;            &n= bsp;            = ;         6

1.4           Synchronization Formats Supported      &n= bsp;            = ;            &n= bsp;            = ;            &n= bsp;    6

1.5           Programming Interface<= span style=3D'mso-tab-count:1'>        &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;    6

Terms and Definitions<= /span>  &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;   6=

2.1           Synchronization Signals        &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp; 7

2.1.1        &= nbsp;       Pulses            =             &nb= sp;            =             &nb= sp;            =             &nb= sp;            =             &nb= sp;            =         7

2.1.2        &= nbsp;       No Pulses     =             &nb= sp;            =             &nb= sp;            =             &nb= sp;            =             &nb= sp;            =           7

2.2           Blanked Video        &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;           7

2.3           Display Controller=         &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p; 7

2.4           Display            =             &nb= sp;            =             &nb= sp;            =             &nb= sp;            =             &nb= sp;            =           7

2.5           Host System        &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;    8

Display Power Manageme= nt States            =             &nb= sp;            =             &nb= sp;            =             &nb= sp;   8=

3.1           On Mode        &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;            8

3.2           Off Mode        &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;          <= !--[if supportFields]> PAGEREF _Toc20211652 \h 8

Display Power Manageme= nt Summary            = ;            &n= bsp;            = ;            &n= bsp;            = ;          8=

Appendix A:  Override Capability (optional)  &nbs= p;            &= nbsp;           &nbs= p;            &= nbsp;           &nbs= p;      9=

Appendix B:  Related Documents/Other Organizati= ons  &nbs= p;            &= nbsp;           &nbs= p;        9=

=  = ;

1      =    Introduction and Scope

1.1      =   Purpose

This document replaces the previous DPMS Standard Version 1.0 Revision 1.0, dated August = 20, 1993. This document will redefine the power state modes of operation. This new specification will reflect the current state of art for power management.

 =

1.2&= nbsp;       Activation Criteria

This document does not specify the criteria for enteri= ng into or out of power management states; it does specify the signaling method used to enter these states. This document is based on the VESA DPMS Standar= d Ver. 1.0 Rev. 1.0.

 

1.3      =   Computer Systems Supported=

DPM is intended to be independent of computer platform= and operating systems.

 

1.4      =   Synchronization Formats Supported

This standard applies to all synchronization (sync) fo= rmats: separate horizontal and vertical sync, composite sync, and sync on green.

 

1.5      =   Programming Interface

No programming interface is defined within this docume= nt.

 

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