Free Run Default Color Output; Figure 106: Free Run Field Length Selection For Channel 1 And Channel 2; Table 61: Default Color Output Values (Cp) - Analog Devices ADV7850 Hardware Manual

ch2_fr_field_length[11:0], Addr 44 (CP), Address 0x46[7:0]; Address 0x47[7:4]
This code is used to define the ideal number of lines per field used by the CP core for the free run decision for sync channel 2. If set to 0,
the ideal number of lines per field is dictated by cp_lcount_max[11:0].
Function
ch2_fr_field_length[11:
0]
0x000 
CP_LCOUNT_MAX[11:0]== 12'd0
CP_LCOUNT_MAX[11:0]
Lcount_Max
Based on PM/VS

Free Run Default Color Output

9.12.3
In the event of loss of input signal, the ADV7850 may enter free run and can be configured to output a color rather than noise. By default,
the ADV7850 is configured to output a blue screen. The default color values are provided in
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
Mode
Default – GR
Default – COMP 0
Man. Override
cp_force_freerun, Addr 44 (CP), Address 0xBF[0]
This control is used to force the CP to free run.
Function
cp_force_freerun
0 
1
Rev. A May 2012
Description
Default
INTERLACED
[11:1]
0
[11:0]
1
[10:0]

Figure 106: Free Run Field Length Selection for Channel 1 and Channel 2

Table 61: Default Color Output Values (CP)

cp_def_col_man_val
0
1
Description
Do not force CP core free run
Force CP core to free run
1
[10:0] FR_FIELD_LENGTH Used On Sync Channel 1
0
CH2_FR_FIELD_LENGTH == 11'd0
CH2_FR_FIELD_LENGTH[10:0]
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
303
1
0
FR_FIELD_LENGTH Used On Sync Channel 2
Table 61.
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]
ADV7850