參數(shù)資料
型號: 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): 106/141頁
文件大小: 1149K
代理商: BT849A
Bt848/848A/849A
Single-Chip Video Capture for PCI
Brooktree
96
C
ONTROL
R
EGISTER
D
EFINITIONS
Brightness Control Register
L848A_A
Brightness Control Register
Memory Mapped Location 0x028 – (BRIGHT)
Upon reset it is initialized to 0x00.
BRIGHT
Bits
Type
Default
Name
Description
[7:0]
RW
0x00
BRIGHT
The brightness control involves the addition of a two’s complement
number to the luma channel. Brightness can be adjusted in 255
steps, from –128 to +127. The resolution of brightness change is
one LSB (0.39% with respect to the full luma range).
Hex Value
Binary Value
Brightness Changed By
Number
of LSBs
Percent of
Full Scale
0x80
1000 0000
–128
–50%
0x81
1000 0001
–127
–49.6%
.
.
.
.
.
.
0xFF
1111 1111
–01
–0.39%
0x00*
0000 0000*
00
0%
0x01
0000 0001
+01
+0.39%
.
.
.
.
.
.
0x7E
0111 1110
+126
+49.2%
0x7F
0111 1111
+127
+49.6%
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