Allwinner A20 - Page 324

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 324 / 812
Offset: 0x80
Register Name: MP_SCACTL_REG
Bit
Read/W
rite
Default/He
x
Description
Enable scaling function.
3.1.4.14. SCALING OUTPUT SIZE REGISTER
Offset: 0x84
Register Name: MP_SCAOUTSIZE_REG
Bit
Read/W
rite
Default/He
x
Description
31:29
/
/
/
28:16
R/W
0
SCA_OUTHEIGHT
Output height
The output height = The value of these bits add 1
The minimum output height is 8 pixels.
15:13
/
/
/
12:0
R/W
0
SCA_OUTWIDTH
Output width
The output width = The value of these bits add 1
The minimum output width is 16 pixels.
3.1.4.15. SCALER HORIZONTAL SCALING FACTOR REGISTER
Offset: 0x88
Register Name: MP_SCAHORFCT_REG
Bit
Read/W
rite
Default/He
x
Description
31:24
/
/
/
23:16
R/W
0
SCA_HORINTFCT
The integer part of the horizontal scaling ratio
the horizontal scaling ratio = input width/output width
15:00
R/W
0
SCA_HORFRAFCT
The fractional part of the horizontal scaling ratio
the horizontal scaling ratio = input width/output width