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NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 1148 -
Revision V1.30
NUC97
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CHNIC
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OSD Overlay Color-Key Mask Register (OSD_CMASK)
A 24-bit value serves as the mask of OSD color-key pattern comparing. The OSD data only
compare with the color-key pattern where the mask bits are set as 1.
Register
Offset
R/W
Description
Reset Value
OSD_CMASK
0x58
R/W
OSD Overlay Color-Key Mask Register
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
OSD_CMASK[23:16]
15
14
13
12
11
10
9
8
OSD_CMASK [15:8]
7
6
5
4
3
2
1
0
OSD_CMASK [7:0]
Bits
Description
[31:24]
Reserved
Reserved.
[23:16]
OSD_CMASK[23:16]
The 8 higher-order bits are used for pattern mask of Y or R component
according to the source color format.
[15:8]
OSD_CMASK[15:8]
The 8 middle-order bits are used for pattern mask of U or G component
according to the source color format.
[7:0]
OSD_CMASK[7:0]
The 8 lower-order bits are used for pattern mask of V or B component
according to the source color format.