Datasheet
ADV7189B
Rev. B | Page 78 of 104
Bits
Subaddress Register Bit Description
7 6 5 4 3 2 1 0 Comments Notes
0 0 No delay
1 0 Luma 1 clk (37ns) delayed
1 0 Luma 2 clk (74ns) early
LTA[1:0]. Luma timing adjust allows
the user to specify a timing
difference between chroma and
luma samples.
1 1 Luma 1 clk (37ns) early
CVBS mode
LTA[1:0] = 00b;
S-Video mode
LTA[1:0] = 01b;PrPb
mode LTA[1:0] = 01b
Reserved 0 Set to 0
0 0 0 Not valid setting
0 0 1 Chroma +2 pixels (early)
0 1 0 Chroma +1 pixel (early)
0 1 1 No delay
1 0 0 Chroma −1 pixel (late)
1 0 1 Chroma −2 pixels (late)
1 1 0 Chroma −3 pixels (late)
CTA[2:0]. Chroma timing adjust
allows a specified timing difference
between the luma and chroma
samples
1 1 1 Not valid setting
CVBS mode
CTA[2:0] = 011b
S-Video mode
CTA[2:0] = 101b
YPrPb mode
CTA[2:0] = 110b
0 Use values in LTA[1:0] and
CTA[2:0] for delaying
luma/chroma
AUTO_PDC_EN. Automatically
programs the LTA/CTA values so
that luma and chroma are aligned
at the output for all modes of
operation.
1 LTA and CTA values
determined automatically
0 No swapping
0x27 Pixel Delay
Control
SWPC. Allows the Cr and Cb
samples to be swapped.
1 Swap the Cr and Cb O/P
samples
0x2B 0 Update once per video
line
PW_UPD. Peak white update
determines the rate of gain.
1 Update once per field
Peak white must
be enabled.
See LAGC[2:0]
Reserved 1 0 0 0 0 Set to default
0 Color kill disabled
CKE. Color kill enable allows the
color kill function to be switched
on and off.
1 Color kill enabled
For SECAM color kill,
threshold is set at
8%.
See CKILLTHR[2:0]
Misc Gain
Control
Reserved
1 Set to default
0 0 Manual fixed gain Use CMG[11:0]
0 1 Use luma gain for chroma
1 0 Automatic gain Based on color burst
CAGC[1:0]. Chroma automatic gain
control selects the basic mode of
operation for the AGC in the
chroma path.
1 1 Freeze chroma gain
Reserved 1 1 Set to 1
0 0 0 Manual fixed gain Use LMG[11:0]
0 0 1 AGC Peak white algorithm
off
Blank level to sync tip
0 1 0 AGC Peak white algorithm
on.
Blank level to sync tip
0 1 1 Reserved
1 0 0 Reserved
1 0 1 Reserved
1 1 0 Reserved
LAGC[2:0]. Luma automatic gain
control selects the mode of
operation for the gain control in
the luma path.
1 1 1 Freeze gain
0x2C AGC Mode
Control
Reserved
1 Set to 1