參數(shù)資料
型號(hào): TVP3020-175
廠商: Texas Instruments, Inc.
英文描述: Video Interface PALETTE(視頻接口調(diào)色器)
中文描述: 視頻接口盒(視頻接口調(diào)色器)
文件頁數(shù): 95/98頁
文件大小: 582K
代理商: TVP3020-175
E–11
Color Key (Red, Green, Blue, Overlay) Low and High Registers
These registers are used to specify the color comparison ranges for the four Direct Color data fields when
performing color key switching. A Low and a High register are provided for each of the four data fields to
facilitate the range comparison. See section 2.6 and 2.6.2 for more details on their useage. All four Low
registers are initiallized with 01 (hex), while all four High registers are initiallized with FF (hex). The registers
may be written to or read from by the MPU at any time. Note that there are 8 registers total, two for each
color. The register format for both Low and High registers is shown below.
Table J–16.
Color Key Low
Data bit
D7
D6
D5
D4
D3
D2
D1
D0
Low Value
7
6
5
4
3
2
1
0
Index = 30h, 32h, 34h, 36h
Table J–17.
Color Key High
Data bit
D7
D6
D5
D4
D3
D2
D1
D0
High Val-
ue
7
6
5
4
3
2
1
0
Index = 31h, 33h, 35h, 37h
Values 00 (hex) to FF (hex) may be written into the 4 Color Key Low and 4 Color Key High registers.
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