Attribute Name
|
Attribute ID
|
Description
|
Possible Ranges
|
PANELDEPTH
|
26
|
Specify Panel Depth based on connected panel.
|
Default is 18, however, on some SCH chipsets 24-bit
also is supported. For example,US15W supports both 18 and 24-bit outputs.
|
DUALCHANNEL
|
27
|
Single or Dual Channel Panel
|
0 = Single
1 = Dual
Default is 0.
|
SPREAD SPECTRUM CLOCKING
|
43
|
Spectrum Clocking
|
3-9 for US15W
0-15 for other chipsets
Default = 7
Step = 1
Note:
This setting changes the EMI characteristics, which can
be measured with tuning equipment. The change will not necessarily be
visible in the display.
|
DITHER
|
45
|
On and off Dithering
|
Dither=0 for 24-bit panels
Dither=1 for 18-bit panels
Default:
• dither = 1 for 18-bit panels
• dither = 0 for 24-bit panels.
|
LVDS PANEL TYPE
|
49
|
LVDS panel connector.
|
0 = SPWG formatted LVDS output (default)
1 = OpenLDI unbalanced color mapping output
Default = 0
|
FIXED TIMING
|
60
|
This indicates whether attached display is a fixed
timing display.
|
0 = on
1 = off
|
INTENSITY
|
70
|
This attribute provides a method to control the
backlight intensity. It is not a method to turn on backlight but provides
a way to adjust its value in percentages from 0% to 100%
|
Valid range is 0-100%.
Default is 100.
|
INVERTER FREQUENCY
|
71
|
A method of controlling the backlight. It determines
the number of time base events in total for a complete cycle of modulated
backlight control.
|
Valid range is 0-65535 Hz.
Typical value is 300 – 1000.
Default depends on the board.
For Atom E6xx, default is 20300. For most boards, default is
0.
Note:
For Atom E6xx platforms provided by Intel to EA customers, the
inverter frequency and intensity needs to be set.
|
BACKLIGHT LEGACY MODE
|
72
|
A method for controlling whether to use legacy mode
for PWM duty cycle. Legacy mode is where the PWM duty cycle will be calculated
using a combination of Backlight duty cycle and Legacy backlight Control
(LBPC). In non-legacy mode, it will be calculated using Backlight duty
cycle only.
|
Valid values are 0 for non-legacy mode or 1 for
legacy mode.
Default is 0.
|