Intel E3815 FH8065301567411 Data Sheet

 

Intel

®

 Atom™ Processor E3800 Product Family

Datasheet

991

Sprite C Constant Alpha Register

Default: 00000000h

27:16

0b

RW

These 12 bits specify the vertical position in lines of the 

beginning of the active display plane relative to the display surface. When performing 

180 rotation, this field specifies the vertical position of the lower right corner relative to 

the start of the active display plane in the unrotated orientation.

15:12

0b

RW

Write as zero

11:0

0b

RW

These 12 bits specify the horizontal offset in pixels of 

the beginning of the active display plane relative to the display surface. When 

performing 180 rotation, this field specifies the horizontal position of the lower right 

corner relative to the start of the active display plane in the unrotated orientation.

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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

ENABL

E

_C

ONST

A

N

T

_

ALP

H

A

RESE

RVED

SPR

IT

E

_C_C

ONS

TA

N

T

_

AL

PH

A

_

V

A

LU

E

31

0b

RW

Sprite C Sprite constant alpha provides a way to apply 

an alpha value to all video sprite pixels. Each pixel color channel is multiplied by the 

constant alpha before proceeding to the blender. This can be used to create fade out 

effects. This is intended for CE device use where the video sprite might still be used to 

generate video output. 

0 Sprite C Sprite Constant Alpha is disabled 

1 Sprite C Sprite Constant Alpha is enabled

30:8

0b

RW

: MBZ

7:0

0b

RW

This field provides the alpha value when 

constant alpha is enabled. A value of FF means fully opaque and a value of zero means 

fully transparent. Values in between those values allow for a blending of sprite with 

other surfaces.