Analog Devices Advantiv ADV7611 Hardware User's Manual page 124

UG-180
CP Synchronization Signals
The three primary synchronization signals have certain default positions, depending on the video standard in use.
To allow for a glueless interface to downstream ICs, there is the facility to adjust the position of edges on the three primary
synchronization signals. Figure 49, Figure 50, Figure 51, Figure 52, Figure 53, Figure 54, Figure 55, and Figure 56 show the nominal
position of HS, VS, and FIELD. The positions of those signals can be adjusted in both directions by using the following controls:
•
START_HS[9:0]
•
END_HS[9:0]
•
START_VS[3:0]
•
END_VS[3:0]
•
START_VS_EVEN[3:0]
•
START_FE[3:0]
•
START_FO[3:0]
All six above parameters are given as signed values. This means that rather than adjusting the absolute position of a signal, these
adjustments allow the user to advance (negative value) or delay (positive value) the respective timing reference signals.
In addition, the polarity of the synchronization output signals can be inverted by using:
•
INV_HS_POL
•
INV_F_POL
•
INV_VS_POL
HSync Timing Controls
Programming the registers listed in this section, the HS signal as shown in Figure 49 can be adjusted in the described manner.
Table 48. HS Default Timing
Symbol Characteristic
a HS to start of active video
d HS width
b Active video samples
c Total samples/line
Table 49. HS Default Timing (Continued, 1)
Symbol Characteristic
a HS to start of active
video
d HS width
b Active video samples
c Total samples/line
Table 50. HS Default Timing (Continued, 2)
Symbol Characteristic
a HS to start of active video
d HS width
b Active video samples
c Total samples/line
Table 51. HS Default Timing (Continued, 3)
Symbol Characteristic
a HS to start of active video
d HS width
b Active video samples
c Total samples/line
Note 525i
Default 118
Default 64
720
858
Note 680 × 480 at 60 Hz
Default 140
Default 96
640
800
800 × 600
Note at 56 Hz
Default 196
Default 72
800
1024
Note 1024 × 768 at 60 Hz
Default 292
Default 136
1024
1344
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625i 525p 625p
128 116 126
All values are for 1× outputs
64 64 64
720 720 720
864 858 864
640 × 480 at 72 Hz 640 × 480 at 75 Hz
164 180
All values are for 1× outputs
40 64
640 640
832 840
800 × 600 800 × 600
at 60 Hz at 72 Hz
212 180
All values are for 1× outputs
128 120
800 800
1056 1040
1024 × 768 at 70 Hz 1024 × 768 at 75 Hz
276 268
All values are for 1x outputs
136 96
1024 1024
1328 1312
Hardware User Guide
720p 1080i 1080p
256 188 118
40 44 44
1280 1920 1920
1650 2200/2376 2200
640 × 480 at 85 Hz
132
56
640
832
800 × 600 800 × 600
at 75 Hz at 85 Hz
236 212
80 64
800 800
1056 1048
1024 × 768at 85 Hz
300
96
1024
1376