Intel E3815 FH8065301567411 Data Sheet

 

Intel

®

 Atom™ Processor E3800 Product Family

Datasheet

995

Sprite C Gamma Correction Registers

Default: 00C0C0C0h

26:16

0b

RW

This 11-bit signed fixed-point number is in 

2 s compliment (s3i.7f) format with the MSB as the sign, next 3 MSBs as the integer 

value and the last 7 LSBs as the fraction value. This field can be used in two modes. 

When full range YUV data is operated on, this field contains the saturation value. When 

the range-limited YCbCr data is used, software should program this field with the 

product of the saturation multiplier value multiplied by the CbCr range scale factor 

(=128/112).  

Similar to the contrast field, there is no limit for saturation reduction saturation = 0 

means all pixels become the same value. However, increasing contrast can only be 

increased by a factor less than 8. For example, the largest contrast with value of 0x7.7F 

can bring input range [0, 32] to a full display color range of [0, 255].  

Bypassing Hue, even for source data in RGB format, is accomplished by programming 

this field to 0.0.

15:10

0b

RW

Reserved.

9:0

001000000

0b

RW

This unsigned fixed-point number is in 

3i.7f format with the first 3 MSBs be the integer value and the last 7 LSBs be the 

fraction value. This field can be used in two modes. When full range YUV data is 

operated on, this field contains the saturation value. When the range-limited YCbCr data 

is used, software should program this field with the product of the saturation multiplier 

value multiplied by the CbCr range scale factor (=128/112).  

Similar to the contrast field, there is no limit for saturation reduction saturation = 0 

means all pixels become the same value. However, increasing contrast can only be 

increased by a factor less than 8. For example, the largest contrast with value of 0x7.7F 

can bring input range [0, 32] to a full display color range of [0, 255].  

Bypassing Saturation, even for source data in RGB format, is accomplished by 

programming this field to 1.0.

Memory Mapped I/O Register

(Size: 32 bits)

PCI Configuration Register (Size: 32 

bits)
GTTMMADR_LSB Reference: 

[B:0, D:2, F:0] + 10h

31

28

24

20

16

12

8

4

0

0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0

RE

SER

V

ED

RED

_

V

_

C

R

GR

E

E

N

_

Y

BLUE_U_C

B

31:24

0b

RW

reserved

23:16

11000000b

RW

gamma correction mapping Red to CR

15:8

11000000b

RW

gamma correction mapping Green to Y