CX25870/871
Appendix A Scaling and I/0 Timing Register Calculations
Flicker-Free Video Encoder with Ultrascale Technology
Table A-6. Overscan Values, 640 x 480 NTSC, Character Clock-Based Controller, 9-Pixel Resolution, 2.5 µs HBlank
Controller Pixels
Total
Encoder Pixels
Active
Overscan (Percent)
Total
H_CLKI
V_LINESI
V_ACTIVEO
H_CLKO
Horizontal
Vertical
Resolution
765
765
765
756
756
810
756
810
819
819
819
720
720
855
693
882
900
675
665
630
595
650
625
630
600
595
600
625
575
665
630
595
650
575
574
665
190
200
212
194
202
200
210
212
210
202
220
190
200
212
194
220
220
190
969
918
867
936
900
972
864
918
936
975
897
912
864
969
858
966
984
855
20.28
15.85
10.90
17.47
14.17
20.53
10.59
15.85
17.47
20.77
13.88
15.30
10.59
20.28
9.97
21.81
17.70
12.76
20.16
16.87
17.70
13.58
12.76
13.58
16.87
9.47
–1.53
–1.84
–1.86
–2.69
–2.70
2.83
–2.99
3.09
3.89
3.90
4.42
21.81
17.70
12.76
20.16
9.47
–6.51
–7.10
7.52
–10.20
10.57
12.03
–12.16
20.03
21.50
9.65
9.47
21.81
100381B
Conexant
A-15
CONEXANT [ CONEXANT SYSTEMS, INC ]
