adv7180 Analog Devices, Inc., adv7180 Datasheet - Page 84

• Manufacturer Part Number: adv7180
• Description: 10-bit, 4 X Oversampling Sdtv Video Decoder
• Manufacturer: Analog Devices, Inc.

ADV7180
Subaddress
0x15
0x17
Register
Digital Clamp
Control 1
Shaping Filter
Control
Bit Description
Reserved.
Digital clamp freeze
(DCFE)
DCT[1:0]. Digital clamp
timing determines the
time constant of the
digital fine clamp circuitry.
Reserved.
YSFM[4:0]. Selects Y
shaping filter mode in
CVBS-only mode.
Allows the user to select a
wide range of low-pass
and notch filters.
If either auto mode is
selected, the decoder
selects the optimum Y
filter depending on the
CVBS video source quality
(good vs. bad).
CSFM[2:0]. C shaping filter
mode allows selection
from a range of low-pass
chrominance filters. If
either auto mode is
selected, the decoder
selects the optimum C
filter depending on the
CVBS video source quality
(good vs. bad). Nonauto
settings force a C filter for
all standards and quality of
CVBS video.
7
0
0
0
0
0
1
1
1
1
(Shading Indicates Default State)
6
0
0
1
1
0
0
1
1
0
0
1
1
Rev. B | Page 84 of 112
5
0
1
0
1
0
1
0
1
0
1
0
1
4
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Bits
3
x
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
2
x
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
x
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
x
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
LQFP-64
Set to default
Digital clamp on
Digital clamp off
Slow (TC = 1 sec)
Medium (TC = 0.5 sec)
Fast (TC = 0.1 sec)
TC dependent on video
Set to default
Auto wide notch for poor quality
sources or wide-band filter with comb
for good quality input
Auto narrow notch for poor quality
sources or wideband filter with comb
for good quality input
SVHS 1
SVHS 2
SVHS 3
SVHS 4
SVHS 5
SVHS 6
SVHS 7
SVHS 8
SVHS 9
SVHS 10
SVHS 11
SVHS 12
SVHS 13
SVHS 14
SVHS 15
SVHS 16
SVHS 17
SVHS 18 (CCIR601)
PAL NN1
PAL NN2
PAL NN3
PAL WN1
PAL WN2
NTSC NN1
NTSC NN2
NTSC NN3
NTSC WN1
NTSC WN2
NTSC WN3
Reserved
Auto selection 15.0 MHz
Auto selection 2.17 MHz
SH1
SH2
SH3
SH4
SH5
Wideband mode
Comments
LFCSP-40
Notes
Decoder selects
optimum Y
shaping filter
depending on
CVBS quality
If one of these
modes is selected,
the decoder does
not change filter
modes; depending
on video quality, a
fixed filter
response (the one
selected) is used
for good and bad
quality video
Automatically
selects a
C filter based on
video standard and
quality
Selects a C filter for
all video standards
and for good and
bad video