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参数资料
型号： ADV7180BST48Z
厂商： Analog Devices Inc
文件页数： 107/116页
文件大小： 0K
描述： IC VID DECOD SDTV 10BIT 48LQFP
标准包装： 1
类型： 视频解码器
应用： 数码相机，手机，便携式视频
安装类型： 表面贴装
封装/外壳： 48-LQFP
供应商设备封装： 48-LQFP（7x7）
包装： 托盘
ADV7180
Data Sheet
Rev. I | Page 90 of 116
Main Map
Bit Description
Bits
(Shading Indicates Default State)
Comments
Notes
Subaddress
Register
7
6
5
4
3
2
1
0
0x27
Pixel delay
control
LTA[1:0]; luma timing
adjust allows the user to
specify a timing difference
between chroma and
luma samples
0
No delay
CVBS mode
LTA[1:0] = 00b,
S-Video mode
LTA[1:0] = 01b,
YPrPb mode
LTA[1:0] = 01b
0
1
Luma one clock (37 ns) late
1
0
Luma two clocks (74 ns) early
1
Luma one clock (37 ns) early
Reserved
0
Set to 0
CTA[2:0]; chroma
timing adjust allows
a specified timing
difference between
the luma and chroma
samples
0
Not a valid setting
CVBS mode
CTA[2:0] = 011b,
S-Videomode
CTA[2:0]=101b,
YPrPb mode
CTA[2:0] = 110b
0
1
Chroma + two pixels (early)
0
1
0
Chroma + one pixel (early)
0
1
No delay
1
0
Chroma one pixel (late)
1
0
1
Chroma two pixels (late)
1
0
Chroma three pixels (late)
1
Not a valid setting
AUTO_PDC_EN;
automatically programs
the LTA/CTA values so
that luma and chroma are
aligned at the output for
all modes of operation
0
Use values in LTA[1:0] and CTA[2:0]
for delaying luma/chroma
1
LTA and CTA values determined
automatically
SWPC; allows the Cr and
Cb samples to be swapped
0
No swapping
1
Swap the Cr and Cb output samples
0x2B
Misc gain
control
PW_UPD; peak white
update determines the
rate of gain
0
Update once per video line
Peak white must
be enabled; see
LAGC[2:0]
1
Update once per field
Reserved
1
0
Set to default
CKE; color kill enable
allows the color kill
function to be switched
on and off
0
Color kill disabled
For SECAM color
kill, the threshold
is set at 8%; see
CKILLTHR[2:0]
1
Color kill enabled
Reserved
1
Set to default
0x2C
AGC mode
control
CAGC[1:0]; chroma auto-
matic gain control selects
the basic mode of
operation for the AGC in
the chroma path
0
Manual fixed gain
Use CMG[11:0]
0
1
Use luma gain for chroma
1
0
Automatic gain
Based on color burst
1
Freeze chroma gain
Reserved
1
Set to 1
LAGC[2:0]; luma auto
matic gain control selects
the mode of operation for
the gain control in the
luma path
0
Manual fixed gain
Use LMG[11:0]
0
1
Peak white algorithm off
Blank level to
sync tip
0
1
0
Peak white algorithm on
Blank level to
sync tip
0
1
Reserved
1
0
Reserved
1
0
1
Reserved
1
0
Reserved
1
Freeze gain
Reserved
1
Set to 1
0x2D
Chroma Gain
Control 1,
Chroma Gain1
(CG)
CMG[11:8]/CG[11:8]; in
manual mode, the chroma
gain control can be used to
program a desired manual
chroma gain; in auto mode,
it can be used to read back
the current gain value
0
1
0
CAGC[1:0] settings
decide in which
mode CMG[11:0]
operates
Reserved
1
Set to 1
CAGT[1:0]; chroma auto
matic gain timing allows
adjustment of the chroma
AGC tracking speed
0
Slow (TC = 2 sec)
Has an effect only
if CAGC[1:0] is set
to autogain (10)
0
1
Medium (TC = 1 sec)
1
0
Reserved
1
Adaptive
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