Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

15.4.6.2.UVSCALE—UV Scale Factor Register

Memory Address Offset:

 

44h (R/W)

 

 

 

 

On-chip Reg. Mem Addr Offset:

30144h (RO; debug path)

 

 

 

Default Value:

 

00h

 

 

 

 

Access:

 

 

 

see address offset above

 

 

 

Size:

 

 

 

32 bits

 

 

 

 

31

 

 

 

 

20

19

16

 

 

 

 

 

 

Vertical Scale Factor UV

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

15

14

 

3

2

1

0

 

 

 

Reserved

 

Horizontal Scale Factor UV

Reserved

UV Down Scale Integer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

 

 

 

Description

 

 

 

 

 

 

 

31:20

Vertical Scale Factor UV. Used only in YUV planar modes to set the scale factor for the UV data. This

 

 

 

is different in formats where the UV data is vertically sub-sampled. Bit 31:20 1 > scale 1/64 (the

 

 

 

maximum vertical up zoom is 64X)

 

 

 

 

 

 

 

 

 

 

 

 

 

19:15

Reserved.

 

 

 

 

 

 

 

 

 

14:3

Horizontal Scale Factor UV. Used only in YUV modes to set the scale factor for the UV data. This is

 

 

 

different in formats where the UV data is sub-sampled.

 

 

 

 

2Reserved.

1:0

UV Down Scale Integer. This field is used only for vertical down scale. It specifies the integer portion

 

of the scale factor for UV data.

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Image 286
Intel 815 manual UVSCALE-UV Scale Factor Register