參數(shù)資料
型號(hào): BT849A
英文描述: Single-Chip Video Capture for PCI
中文描述: 單芯片的PCI視頻捕捉
文件頁數(shù): 108/141頁
文件大小: 1149K
代理商: BT849A
Bt848/848A/849A
Single-Chip Video Capture for PCI
Brooktree
98
C
ONTROL
R
EGISTER
D
EFINITIONS
Luma Gain Register, Lower Byte
L848A_A
Luma Gain Register, Lower Byte
Memory Mapped Location 0x030 – (CONTRAST_LO)
Upon reset it is initialized to 0xD8. CONTRAST_LO(0) is the least significant bit.
CONTRAST
The least significant byte of the luma gain (contrast) value.
Bits
Type
Default
Name
Description
[7:0]
RW
0xD8
CONTRAST_LO
The CON_L_MSB bit and the CONTRAST_LO register concate-
nate to form the 9-bit CONTRAST register. The value in this regis-
ter is multiplied by the luminance value to provide contrast
adjustment.
Decimal Value
Hex Value
% of Original Signal
511
0x1FF
236.57%
510
0x1FE
236.13%
.
.
.
.
.
.
217
0x0D9
100.46%
216
0x0D8*
100.00%
.
.
.
.
.
.
128
0x080
59.26%
.
.
.
.
.
.
1
0x001
0.46%
0
0x000
0.00%
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