參數(shù)資料
型號(hào): BT848A
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): 107/141頁
文件大?。?/td> 1149K
代理商: BT848A
Brooktree
97
C
ONTROL
R
EGISTER
D
EFINITIONS
Miscellaneous Control Register
L848A_A
Bt848/848A/849A
Single-Chip Video Capture for PCI
Miscellaneous Control Register
Memory Mapped Location 0x02C – Even Field (E_CONTROL)
Memory Mapped Location 0x0AC – Odd Field (O_CONTROL)
Upon reset it is initialized to 0x20. SAT_V_MSB is the least significant bit.
Bits
Type
Default
Name
Description
[7]
RW
0
LNOTCH
This bit is used to include the luma notch filter. For monochrome
video, the notch filter should not be used. This will output full band-
width luminance.
0
= Enable the luma notch filter
1
= Disable the luma notch filter
[6]
RW
0
COMP
When COMP is set to logical one, the luma notch is disabled.
When COMP is set to logical zero, the C ADC is disabled.
0
= Composite Video
1
= Y/C Component Video
[5]
RW
1
LDEC
The luma decimation filter is used to reduce the high-frequency
component of the luma signal. Useful when scaling to CIF resolu-
tions or lower.
0
= Enable luma decimation using selectable H filter
1
= Disable luma decimation
[4]
RW
0
CBSENSE
This bit controls whether the first pixel of a line is a Cb pixel or a Cr
pixel. For example, if CBSENSE is low and HDELAY is an even
number, the first active pixel output is a Cb pixel. If HDELAY is odd,
CBSENSE may be programmed high to produce a Cb pixel as the
first active pixel output.
0
= Normal Cb, Cr order
1
= Invert Cb, Cr order
[3]
RW
0
Reserved
This bit should only be written with a logical zero.
[2]
RW
0
CON_MSB
The most significant bit of the luma gain (contrast) value.
[1]
RW
0
SAT_U_MSB
The most significant bit of the chroma (u) gain value.
[0]
RW
0
SAT_V_MSB
The most significant bit of the chroma (v) gain value.
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