DTD Parameter
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Description
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Enter DTD File Name
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Enter a name for this customized DTD. This is a
required field and the name must be between 1 and 50 characters and may
contain spaces and underscores.
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DTD Type
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Select the DTD Type that most closely aligns with
your display parameters. Options are:
• Intel®
EMGD Parameters:
The Intel® EMGD Parameters are the same as the current PCF/CED
DTD parameters.
• VESA Parameters:
The VESA Parameters allow the user to create a DTD from a VESA monitor
timing standard.
• Hardware Parameters:
The Hardware Parameters are the parameters that are used by Intel® EMGD.
• Simple Parameters:
The Simple Parameters (CVT Standard) is a process for computing standard
timing specifications. The method for developing Reduced Blanking timings
is not included.
• Mode Lines:
The Mode Lines are a video timing spec used by X.Org. The X.Org timing
setting for Mode Lines is “name” I A B C D E F G H. For example:
“640x480@8bpp” 25.175 640 672 728 816 480 489 501 526.
• EDID Block:
The EDID Block is the detailed timing section (18 bytes) of the basic
128-byte EDID data structure. The detailed timing section starts at 36h
of the 128-byte EDID data structure. Enter the EDID block 1 byte at a
time. Example:
a0 0f 20 00 31 58 1c 20 d2 1a 14 00 f6 b8 00 00 00 18
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Pixel Clock
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Pixel clock value in KHz. Range 0-0x7fffffff.
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DTD Settings Flags
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This section allows you to set flags for Interlace,
Vertical Sync Polarity, Horizontal Sync Polarity, and Blank Sync Polarity.
Each field in this section is described below.
Interlaced Display:
• Check for Interlaced
• Cleared for Non-interlaced
Vertical Sync Polarity:
• Active Low (Default)
• Active High
Horizontal Sync Polarity:
• Active Low (Default)
• Active High
Blank Sync Polarity:
• Active Low (Default)
• Active High
Note:
These flags are Intel®
EMGD-specific and do not correspond to VESA 3.0 flags.
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Horizontal Sync Offset (Front Porch) in pixels
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Specifies the amount of time after a line of the
active video ends and the horizontal sync pulse starts (Horizontal Front
Porch). Range 0-1023 [10 bits].
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Horizontal Sync Pulse Width (Sync Time) in pixels
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Width of the Horizontal Sync Pulse (Sync Time) which
synchronizes the display and returns the beam to the left side of the
display. Range 0-1023 [10 bits].
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Horizontal Blank Width (Blank Time) in pixels
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This parameter indicates the amount of time it takes
to move the beam from the right side of the display to the left side
of the display (Blank Time). During this time, the beam is shut off,
or blanked. Range 0-4095 [12 bits].
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Horizontal Active (Width) in pixels
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Number of pixels displayed on a horizontal line
(Width). Range 1-32767 [15 bits].
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Horizontal Sync Start in pixels
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This parameter specifies the start of the horizontal
active time.
Range 0-40957.
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Horizontal Sync End in pixels
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This parameter specifies the end of the horizontal
active time.
Range 0-49148.
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Horizontal Blank Start in pixels
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This parameter specifies the start of one line of
the video and margin period. Range 0-32766.
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Horizontal Blank End in pixels
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This parameter specifies the end of one line of
the video and margin period. Range 0-65533.
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Refresh in Hz
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Also known as the Vertical Refresh, the rate the
full display updates. Standard refresh rates are 50Hz, 60Hz, 75Hz, and
85Hz.
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Vertical Sync Offset (Front Porch) in lines
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Specifies the amount of time after last active line
of video ends and vertical sync pulse starts (Vertical Front Porch).
Range 0-4095 [12 bits].
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Vertical Sync Pulse Width (Sync Time) in lines
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Specifies the Width of the Vertical Sync Pulse which
synchronizes the display on the vertical axis and returns the beam to
the top, left side of the display. Range 0-63 [6 bits].
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Vertical Blank Width (Blank Time) in lines
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The amount of time for the complete vertical blanking
operation to complete. It indicates the time it takes to move the beam
from the bottom right to the top, left side of the display (Blank Time).
During this time, the beam is shut off, or blanked. Range 0-4095 [12
bits].
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Vertical Active (Height) in lines
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The number of active lines displayed (Height). Range
1-4095 [12 bits].
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Vertical Sync Start in lines
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This parameter specifies the start of the vertical
sync. Range 0-4157.
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Vertical Sync End in lines
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This parameter specifies the end of the vertical
sync. Range 0-4220.
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Vertical Blank Start in lines
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This parameter specifies the start of display vertical
blanking including margin period. Range 0-4094.
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Vertical Blank End in lines
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This parameter specifies the end of vertical blanking.
Range 0-8189.
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