Data Sheet
ADV7180
Bits
(Shading Indicates Default State)
Subaddress
Register
Bit Description
7
6
5
4
3
2
1
0
Comments
Notes
GDECOL[15:8]; see the
Comments column
0
0
0
0
0
0
0
0
GDECOL[15:0]: 16 individual enable bits
that select the lines of video (odd field
Line 10 to Line 25) that the decoder
checks for Gemstar-compatible data
LSB = Line 10,
MSB = Line 25,
0x4A
Gemstar
Control 3
Default = do not
check for Gemstar-
compatible data on
any lines [10 to 25]
in odd fields
GDECOL[7:0]
0
0
0
0
0
0
0
0
0x4B
Gemstar
Control 4
GDECAD; controls the
0
1
Split data into half-byte
To avoid 00/FF code
0x4C
Gemstar
Control 5
manner decoded Gemstar
data is inserted into the
horizontal blanking period
Output in straight 8-bit format
GDE_SEL_OLD_ADF
Reserved
0
Enables a new ancillary data system
Undefined
x
x
x
x
x
x
0x4D
CTI DNR
Control 1
CTI_EN; CTI enable
0
1
Disable CTI
Enable CTI
CTI_AB_EN; enables the
mixing of the transient
improved chroma with
the original signal
0
1
Disable CTI alpha blender
Enable CTI alpha blender
CTI_AB[1:0]; controls the
behavior of the alpha-
blend circuitry
0
0
1
1
0
1
0
1
Sharpest mixing
Sharp mixing
Smooth mixing
Smoothest mixing
Set to default
Reserved
0
DNR_EN; enable or bypass
the DNR block
0
1
Bypass the DNR block
Enable the DNR block
Set to default
Reserved
1
0
1
0
0x4E
0x50
0x51
CTI DNR
Control 2
CTI_C_TH[7:0]; specifies
how big the amplitude
step must be to be steep-
ened by the CTI block
0
0
0
1
1
0
0
0
0
0
0
Set to 0x04 for AV input;
set to 0x0A for tuner input
CTI DNR
Control 4
DNR_TH[7:0]; specifies
the maximum edge that is
interpreted as noise and is
therefore blanked
0
0
0
Lock count
CIL[2:0]; count into lock
determines the number of
lines the system must
remain in lock before
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
One line of video
Two lines of video
Five lines of video
10 lines of video
100 lines of video
500 lines of video
1000 lines of video
100,000 lines of video
1 line of video
2 lines of video
5 lines of video
10 lines of video
100 lines of video
500 lines of video
1000 lines of video
100,000 lines of video
Over field with vertical info
Line-to-line evaluation
showing a locked status
COL[2:0]; count out of
lock determines the
number of lines the
system must remain out-
of-lock before showing a
lost-locked status
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
SRLS; select raw lock signal;
selects the determination
of the lock status
0
1
FSCLE; fSC lock enable
0
1
Lock status set only by horizontal lock
Lock status set by horizontal lock and
subcarrier lock
0x58
VS/FIELD
pin control
VS/FIELD; VSYNC or FIELD
output; 40-lead and
32-lead LFCSP only
0
1
FIELD
VSYNC
Pin 37 on 40-lead
LFCSP, Pin 31 on
32-lead LFCSP
Reserved
0
Set to default
ADC sampling control
0
1
ADC sampling control
Y/C mode only
Set to default
Mandatory write
Reserved
0
0
0
0
0
Rev. G | Page 93 of 120
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