Allwinner A20 - Page 553

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 553 / 812
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
DE-SPRITE ALPHA CONTROL REGISTER
Offset: 0x90C
Register Name: DEBE_SPRALPHACTL_REG
Bit
Read/W
rite
Default/
Hex
Description
31:24
R/W
UDF
SPR_GLBALPHA
Globe alpha value
23:1
/
/
/
0
R/W
UDF
SPR_GLBALPHAEN
0:
Disable the globe alpha function
1:
Enable the globe alpha function, when the function is set, the
sprite will use the globe alpha value to calculate the display pixels.
5.4.4.23. DE-SPRITE SINGLE BLOCK COORDINATE CONTROL REGISTER
Offset:
Block 0: 0xA00
Block 1: 0xA04
Block 2: 0xA08
.
.
.
Block 31: 0xA7C
Register Name: DEBE_SPRCOORCTL_REG
Bit
Read/W
rite
Default/
Hex
Description
31:16
R/W
UDF
SPR_YCOOR
Y coordinate
Y is the left-top y coordinate of layer on screen in pixels
The Y represent the two’s complement
15:0
R/W
UDF
SPR_XCOOR
X coordinate
X is left-top x coordinate of the layer on screen in pixels
The X represent the two’s complement