Analog Devices Advantiv ADV7619 Hardware User's Manual page 151

Hardware User Guide
Free Run Default Color Output
In the event of loss of input signal, the ADV7619 may enter free run and can be configured to output a default color rather than noise.
The default color values are given in Table 65.
The times at which the default colors are inserted can be set as follows:
•
Free run is forced: default colors are always output
•
Automatic free run mode: default colors are output when the system detects a loss of video signal
Table 65. Default Color Output Values (CP)
Mode
Default—GR
Default—COMP
Man. Override
CP_FORCE_FREERUN , Addr 44 (CP), Address 0xBF[0]
A control to force the CP to free run.
Function
CP_FORCE_FREERUN
0 (default)
1
CP_DEF_COL_AUTO , Addr 44 (CP), Address 0xBF[1]
A control to enable the insertion of default color when the CP free runs.
Function
CP_DEF_COL_AUTO
0
1 (default)
CP_DEF_COL_MAN_VAL , Addr 44 (CP), Address 0xBF[2]
A control to enable manual selection of the color used when the CP core free runs.
Function
CP_DEF_COL_MAN_VAL
0 (default)
1
Table 65 shows the default colors for component and graphics based video. The values describe the color blue. Setting the
CP_DEF_COL_MAN_VAL bit high enables the user to overwrite the default colors with the values given in DEF_COL_CHA[7:0],
DEF_COL_CHB[7:0], and DEF_COL_CHC[7:0].
The three parameters DEF_COL_CHA[7:0], DEF_COL_CHB[7:0], and DEF_COL_CHC[7:0] allow the user to specify their own default
values.
Note: CP_DEF_COL_MAN_VAL must be set high for the three parameters to be used. See Table 65 for more information on the
automatic values.
DEF_COL_CHA[7:0] , Addr 44 (CP), Address 0xC0[7:0]
A control the set the default color for Channel A. To be used if CP_DEF_COL_MAN_VAL is 1.
Function
DEF_COL_CHA[7:0]
0x00 (default)
CP_DEF_COL_MAN_VAL
0
0
1
Description
Do not force the CP core free run.
Force the CP core to free run.
Description
Disable automatic insertion of default color
Output default colors when the CP free runs
Description
Uses default color blue
Outputs default colors as given in CP_DEF_COL_CHA, CP_DEF_COL_B and CP_DEF_COL_C
Description
Default value
Signal
CH_A (G)
CH_B (R)
CH_C (B)
CH_A (Y)
CH_A (Pr)
CH_A (Pb)
CH_A
CH_B
CH_C
Rev. A | Page 151 of 204
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Value
0
0
135
d
35
d
114
d
212
d
4·DEF_COL_CHA[7:0]
4·DEF_COL_CHB[7:0]
4·DEF_COL_CHC[7:0]