Analog Devices ADV7181BCP Manual page 85

Subaddress Register
0xC4 ADC
SWITCH 2
0xDC Letterbox
Control 1
0xDD Letterbox
Control 2
0xDE
0xDF
0xE0
0xE1 SD Offset
Cb
0xE2 SD Offset
Cr
0xE3 SD
Saturation
Cb
0xE4 SD
Saturation
Cr
0xE5 NTSC V Bit
Begin
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Bit Description
ADC2_SW[3:0]. Manual muxing
control for ADC2.
Reserved.
ADC_SW_MAN_EN. Enable manual
setting of the input signal muxing.
LB_TH[4:0]. Sets the threshold value
that determines if a line is black.
Reserved.
LB_EL[3:0]. Programs the end line of
the activity window for LB detection
(end of field).
LB_SL[3:0]. Program the start line of
the activity window for LB detection
(start of field).
Reserved.
Reserved.
Reserved.
SD_OFF_CB[7:0]. Adjusts the hue by
selecting the offset for the Cb
channel.
SD_OFF_CR[7:0]. Adjusts the hue by
selecting the offset for the Cr
channel.
SD_SAT_CB[7:0]. Adjusts the
saturation of the picture by
affecting gain on the Cb channel.
SD_SAT_CR[7:0]. Adjusts the
saturation of the picture by
affecting gain on the Cr channel.
NVBEG[4:0]. How many lines after
l rollover to set V high.
COUNT
NVBEGSIGN.
NVBEGDELE. Delay V bit going high
by one line relative to NVBEG (even
field).
NVBEGDELO. Delay V bit going high
by one line relative to NVBEG (odd
field).
Bits
7 6 5 4 3 2 1 0
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
x x x
0
1
0 1 1 0 0
1 0 1
1 1 0 0
0 1 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 1 0 1 0 0
1 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0
0 0 1 0 1
0
1
0
1
0
1
Rev. B | Page 85 of 100
ADV7181B
Comments Notes
No connection SETADC_sw_
man_en = 1.
No connection
No connection
No connection
No connection
AIN6
No connection
No connection
No connection
No connection
No connection
No connection
No connection
AIN5
No connection
No connection
Disable
Enable
Default threshold for the
detection of black lines
Set as default
LB detection ends with
the last line of active video
on a field.;1100b: 262/525
Letterbox detection
aligned with the start of
active video; 0100b:
23/286 NTSC
Chroma gain = 0 dB
Chroma gain = 0 dB
NTSC default (BT.656)
Set to low when manual
programming
Not suitable for user
programming
No delay
Additional delay by 1 line
No delay
Additional delay by 1 line