web_Inter_LVDS_port_attrib

Internal LVDS Port Driver Attributes (Mobile chipsets only)

Internal LVDS Port Driver Attributes

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.




*Other names and brands may be claimed as the property of others.
Revised June 20, 2011