Datasheet

Table Of Contents
ADV7188
Rev. A | Page 97 of 112
Bit
1
Address Register Bit Description 7 6 5 43210Comments Notes
0xEE FB_CONTROL 2 MAN_ALPHA_VAL [6:0]. These bits determine
in what proportion the video from the CVBS
and RGB sources are blended.
0 0 0 0 0 0 0
0 Automatic configuration of the
CSC for SCART support
CSC is used to convert RGB portion of
SCART signal to YCrCb
FB_CSC_MAN.
1 Enable manual programming of CSC
0xEF FB_CONTROL 3 000No edge shaping
FB_EDGE_SHAPE [2:0].
001Level 1 edge shaping
Improves picture transition for high
speed fast blank switching. All other
settings are invalid.
0 1 0 Level 2 edge shaping
011Level 3 edge shaping
100Level 4 edge shaping
CNTR_ENABLE. 0 Contrast reduction mode disabled
and FB signal interpreted as
bilevel signal
1 Contrast reduction mode enabled
and FB signal interpreted as
trilevel signal
FB_SP_ADJUST. 0 1 0 0 Adjusts FB timing in reference to
the sampling clock
Each LSB corresponds to
th
of a
clock cycle
0xF0 FB_CONTROL 4 FB_DELAY [3:0]. 0 1 0 0 Delay on FB signal in 28.63636 MHz
clock cycles
Reserved. 0 1 0 0
0xF1 FB_CONTROL 5 RGB_IP_SEL. 0 SD RGB input for FB on AIN7, AIN8,
and AIN9
1SD RGB input for FB on AIN4, AIN5,
and AIN6
Reserved. 0 Set to 0
00 25%
CNTR_MODE [1:0]. These bits allow adjustment
of contrast level in the contrast reduction box.
01 50%
10 75%
1 1 100%
FB_LEVEL [1:0]. These bits control reference
level for fast blank comparator.
0 0 CNTR_ENABLE = 0,
FB threshold = 1.4 V
CNTR_ENABLE = 1,
FB threshold = 1.6 V
01 CNTR_ENABLE = 0,
FB threshold = 1.6 V
CNTR_ENABLE = 1,
FB threshold = 1.8 V
10 CNTR_ENABLE = 0,
FB threshold = 1.8 V
CNTR_ENABLE = 1,
FB threshold = 2 V
11 CNTR_ENABLE = 0,
FB threshold = 2 V
CNTR_ENABLE = 1,
FB threshold = not used
0 0 0.4 V contrast reduction threshold CNTR_ENABLE = 1
CNTR_LEVEL [1:0]. These bits control reference
level for contrast reduction comparator.
0 1 0.6 V contrast reduction threshold
1 0 0.8 V contrast reduction threshold
11 Not used
0xF3 AFE_CONTROL 1 AA_FILT_EN [0]. 0 Disables the internal antialiasing
filter on Channel 0
1 Enables the internal antialiasing
filter on Channel 0
0 Disables the internal antialiasing
filter on Channel 1
AA_FILT_EN [1].
1 Enables the internal antialiasing
filter on Channel 1
0 Disables the internal antialiasing
filter on Channel 2
AA_FILT_EN [2].
1 Enables the internal antialiasing
filter on Channel 2
0 Disables the internal antialiasing
filter on Channel 3
AA_FILT_EN [3].
1 Enables the internal antialiasing
filter on Channel 3