Appendix A Scaling and I/0 Timing Register Calculations
CX25870/871
Flicker-Free Video Encoder with Ultrascale Technology
Table A-13. Overscan Values 800 x 600 NTSC, Pixel-Based Controller, 1-Pixel Resolution, 3:2 Clocking Mode (4 of 4)
Controller Pixels
Total
Encoder Pixels
Overscan (Percent)
Active
Total
H_CLKI
V_LINESI
V_ACTIVEO
H_CLKO
Horizontal
Vertical
Delta
1050
1050
1050
1050
1050
1050
1050
1305
1050
1050
1050
1050
1320
1323
1330
1029
1025
1350
1350
816
831
819
807
822
810
825
735
813
798
801
804
735
725
720
825
819
721
714
194
190
193
196
192
195
191
215
194
198
197
196
215
218
219
191
193
219
221
1088
1108
1092
1076
1096
1080
1100
1218
1084
1064
1068
1072
1232
1218
1216
1078
1066
1236
1224
11.25
12.85
11.57
10.26
11.90
10.59
12.22
20.72
10.92
9.25
20.16
21.81
20.58
19.34
20.99
19.75
21.40
11.52
20.16
18.52
18.93
19.34
11.52
10.29
9.88
–8.92
–8.96
–9.00
–9.08
–9.09
–9.16
–9.18
9.20
–9.24
–9.27
–9.34
–9.42
10.10
10.43
10.72
–10.97
–11.16
12.00
12.06
9.59
9.92
21.62
20.72
20.59
10.43
9.42
21.40
20.58
9.88
21.88
21.11
9.05
A-30
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
