CX25870/871
Appendix A Scaling and I/0 Timing Register Calculations
Flicker-Free Video Encoder with Ultrascale Technology
Table A-7. Overscan Values, 640 x 480 PAL-BDGHI, Pixel-Based Controller, 1-Pixel Resolution, 2.5 µs HBlank (2 of 3)
Controller Pixels
Total
Encoder Pixels
Active
Overscan (Percent)
Total
H_CLKI
V_LINESI
V_ACTIVEO
H_CLKO
Horizontal
Vertical
Resolution
931
960
930
961
962
929
963
928
964
927
925
965
926
966
925
967
925
924
968
923
969
922
970
921
971
920
972
973
919
974
918
625
625
625
625
625
625
625
625
625
625
650
625
625
625
625
625
600
625
625
625
625
625
625
625
625
625
625
625
625
625
625
240
240
240
240
240
240
240
240
240
240
231
240
240
240
240
240
250
240
240
240
240
240
240
240
240
240
240
240
240
240
240
931
960
930
961
962
929
963
928
964
927
962
965
926
966
925
967
888
924
968
923
969
922
970
921
971
920
972
973
919
974
918
15.39
17.95
15.30
18.03
18.12
15.21
18.20
15.12
18.29
15.03
18.12
18.37
14.94
18.46
14.84
18.54
11.30
14.75
18.63
14.66
18.71
14.57
18.79
14.47
18.88
14.38
18.96
19.04
14.29
19.13
14.19
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
13.19
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
–1.27
1.28
–1.36
1.37
1.45
–1.46
1.54
–1.55
1.62
–1.64
–1.67
1.71
–1.73
1.79
–1.82
1.88
–1.90
–1.91
1.96
–2.01
2.04
–2.10
2.13
–2.19
2.21
–2.29
2.30
2.38
–2.38
2.46
–2.47
100381B
Conexant
A-17
CONEXANT [ CONEXANT SYSTEMS, INC ]
