Datasheet
ADV7189B
Rev. B | Page 83 of 104
Bits
Subaddress Register Bit Description
7 6 5 4 3 2 1 0 Comments Notes
Reserved 0 1 0 0 0 0 Set to default
0 SFL compatible with
ADV7190/ADV7191/
ADV7194 encoders
SFL_INV. Controls the behavior of
the PAL switch bit.
1 SFL compatible with
ADV717x/ADV7173x
encoders
0x41 Resample
Control
Reserved.
0 Set to default
0x48 Gemstar
Control 1
GDECEL[15:8]. See the Comments
column.
0 0 0 0 0 0 0 0
0x49 Gemstar
Control 2
GDECEL[7:0]. See the Comments
column
0 0 0 0 0 0 0 0
GDECEL[15:0]. 16
individual enable bits that
select the lines of video
(even field lines 10 to 25)
that the decoder checks
for Gemstar-compatible
data.
LSB = Line 10
MSB = Line 25
Default = Do not
check for Gemstar-
compatible data on
any lines (10 to 25) in
even fields
0x4A Gemstar
Control 3
GDECOL[15:8]. See the Comments
column.
0 0 0 0 0 0 0 0
0x4B Gemstar
Control 4
GDECOL[7:0]. See above. 0 0 0 0 0 0 0 0
GDECOL[15:0]. 16
individual enable bits that
select the lines of video
(odd field lines 10 to 25)
that the decoder checks
for Gemstar-compatible
data.
LSB = Line 10
MSB = Line 25
Default = Do not
check for Gemstar-
compatible data on
any lines (10 to 25) in
odd fields
0 Split data into half byte To avoid 00/FF code. GDECAD. Controls the manner in
which decoded Gemstar data is
inserted into the horizontal
blanking period.
1 Output in straight 8-bit
format
0x4C Gemstar
Control 5
Reserved.
x x x x x x x Undefined
0 Disable CTI CTI_EN. CTI enable.
1 Enable CTI
0 Disable CTI alpha blender CTI_AB_EN. Enables the mixing of
the transient improved chroma
with the original signal.
1 Enable CTI alpha blender
0 0 Sharpest mixing
0 1 Sharp mixing
1 0 Smooth
CTI_AB[1:0]. Controls the behavior
of the alpha-blend circuitry.
1 1 Smoothest
Reserved. 0 Set to default
0 Bypass the DNR block DNR_EN. Enable or bypass the DNR
block.
1 Enable the DNR block
0x4D CTI DNR
Control 1
Reserved.
1 1 Set to default
0x4E CTI DNR
Control 2
CTI_CTH[7:0]. Specifies how big the
amplitude step must be to be
steepened by the CTI block.
0 0 0 0 1 0 0 0
0x50 CTI DNR
Control 4
DNR_TH[7:0]. Specifies the
maximum edge that is
interpreted as noise and is
therefore blanked.
0 0 0 0 1 0 0 0
Set to 0x04 for A/V input;
set to 0x0A for tuner input