ADV7182 datasheet(39/96 Pages) AD

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Data Sheet

ADV7182

Rev. A | Page 39 of 96

ACE_LUMA_GAIN[4:0], User Sub Map 2, Address 0x83[4:0]

A control to set the auto-contrast level for the luma channel when

ACE_ENABLE is 1.

Table 63. ACE_LUMA_GAIN Function

ACE_LUMA_GAIN[4:0]

Description

00000

Set ACE luma auto-contrast level to

minimum value

01101 (default)

Set ACE luma auto-contrast level to

default value

11111

Set ACE luma auto-contrast level to

maximum value

ACE_RESPONSE_SPEED[3:0], User Sub Map 2,

Address 0x85[7:4]

Sets the reaction time of the ACE function.

Table 64. ACE_RESPONSE_SPEED Function

ACE_ RESPONSE_SPEED[3:0]

Description

0000

Set speed of ACE response to

slowest value

1111 (default)

Set speed of ACE response to

fastest value

ACE_CHROMA_GAIN[3:0], User Sub Map 2,

Address 0x84[3:0]

This control sets the color-saturation level for the color channels

when ACE_ENABLE is 1.

Table 65. ACE_CHROMA_GAIN Function

ACE_CHROMA_GAIN[3:0]

Description

0000

Set ACE color auto-saturation level

to minimum value

1000 (default)

Set ACE color auto-saturation level

to default value

1111

Set ACE color auto-saturation level

to maximum value

ACE_CHROMA_MAX[3:0], User Sub Map 2,

Address 0x84[7:4]

This control sets a maximum threshold value that clips the

chroma gain regardless of the ACE_CHROMA_GAIN[3:0]

settings.

Table 66. ACE_CHROMA_MAX Function

ACE_CHROMA_MAX[3:0]

Description

0000

Set maximum threshold for ACE

color auto-saturation level to

minimum value

1000 (default)

Set maximum threshold for ACE

color auto-saturation level to

default value

1111

Set maximum threshold for ACE

color auto-saturation level to

maximum value

ACE_GAMMA_GAIN[3:0], User Sub Map 2,

Address 0x85[3:0]

This control provides further contrast enhancement to the luma

and chroma gain controls and is particularly effective in the darker

areas of an image.

Table 67. ACE_GAMMA_GAIN[3:0] Function

ACE_GAMMA_GAIN[3:0]

Description

0000

Set further contrast enhancement

to minimum value

1000 (default)

Set further contrast enhancements

to default value

1111

Set further contrast enhancement

to maximum value

DITHER FUNCTION

The dither function converts the digital output of the ADV7182

from 8-bit pixel data down to 6-bit pixel data. This function makes

it easier for the ADV7182 to communicate with some LCD panels.

The dither function is turned off by default. It is activated by the

BR_DITHER_MODE bit.

BR_DITHER_MODE, User Sub Map 2, Address 0x92[0]

Table 68. BR_DITHER_MODE Function

BR_DITHER_MODE

Description

0 (default)

8-bit to 6-bit down dither disabled

8-bit to 6-bit down dither enabled

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