Datasheet

ADV7189B
Rev. B | Page 76 of 104
Bits
Subaddress Register Bit Description
7 6 5 4 3 2 1 0 Comments Notes
Reserved 0 x x x x Set to default
0 0 Slow (TC = 1 sec)
0 1 Medium (TC = 0.5 sec)
1 0 Fast (TC = 0.1 sec)
DCT[1:0]. Digital clamp timing
determines the time constant of
the digital fine clamp circuitry.
1 1 TC dependent on video
0x15 Digital
Clamp
Control 1
Reserved
0 Set to default
0 0 0 0 0 Auto wide notch for poor
quality sources or wide-
band filter with Comb for
good quality input
0x17
0 0 0 0 1 Auto narrow notch for
poor quality sources or
wideband filter with comb
for good quality input
Decoder selects
optimum Y-shaping
filter depending on
CVBS quality.
0 0 0 1 0 SVHS 1
Shaping
Filter
Control
0 0 0 1 1 SVHS 2
0 0 1 0 0 SVHS 3
0 0 1 0 1 SVHS 4
0 0 1 1 0 SVHS 5
0 0 1 1 1 SVHS 6
0 1 0 0 0 SVHS 7
0 1 0 0 1 SVHS 8
0 1 0 1 0 SVHS 9
0 1 0 1 1 SVHS 10
0 1 1 0 0 SVHS 11
0 1 1 0 1 SVHS 12
0 1 1 1 0 SVHS 13
0 1 1 1 1 SVHS 14
1 0 0 0 0 SVHS 15
1 0 0 0 1 SVHS 16
1 0 0 1 0 SVHS 17
1 0 0 1 1 SVHS 18 (CCIR601)
1 0 1 0 0 PAL NN1
1 0 1 0 1 PAL NN2
1 0 1 1 0 PAL NN3
1 0 1 1 1 PAL WN 1
1 1 0 0 0 PAL WN 2
1 1 0 0 1 NTSC NN1
1 1 0 1 0 NTSC NN2
1 1 0 1 1 NTSC NN3
1 1 1 0 0 NTSC WN1
1 1 1 0 1 NTSC WN2
1 1 1 1 0 NTSC WN3
YSFM[4:0]. Selects Y-Shaping Filter
mode when 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).
1 1 1 1 1 Reserved
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.
0 0 0 Auto selection 15 MHz
0 0 1 Auto selection 2.17 MHz
Automatically selects
a C filter for the
specified bandwidth.
0 1 0 SH1
0 1 1 SH2
1 0 0 SH3
1 0 1 SH4
1 1 0 SH5
CSFM[2:0].
C-Shaping Filter mode allows the
selection from a range of low-pass
chrominance filters, SH1to SH5, and
wideband mode.
1 1 1 Wideband mode