Appendix A Scaling and I/0 Timing Register Calculations
CX25870/871
Flicker-Free Video Encoder with Ultrascale Technology
Table A-9. Overscan Values, 640 x 480 PAL-BDGHI, 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
945
954
936
963
927
972
918
981
909
990
900
900
999
891
1008
882
873
625
625
625
625
625
625
625
625
625
625
650
625
625
625
625
625
625
240
240
240
240
240
240
240
240
240
240
231
240
240
240
240
240
240
945
954
936
963
927
972
918
981
909
990
936
900
999
891
1008
882
873
16.65
17.43
15.84
18.20
15.03
18.96
14.19
19.71
13.35
20.44
15.84
12.48
21.15
11.59
21.86
10.69
9.77
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
19.79
16.67
16.67
16.67
16.67
16.67
16.67
–0.02
0.77
–0.82
1.54
–1.64
2.30
–2.47
3.04
–3.32
3.77
–3.95
–4.19
4.49
–5.07
5.19
–5.97
–6.89
A-20
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
