cx25870 Conexant Systems, Inc., cx25870 Datasheet - Page 199

• Manufacturer Part Number: cx25870
• Description: Video Encoder With Adaptive Flicker Filtering And Hdtv Output
• Manufacturer: Conexant Systems, Inc.

CX25870/871
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)
100381B
H_CLKI
Controller Pixels
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
Total
V_LINESI
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
V_ACTIVEO
Active
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
Encoder Pixels
Conexant
H_CLKO
Total
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
Appendix A Scaling and I/0 Timing Register Calculations
Horizontal
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
Overscan (Percent)
Vertical
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
Resolution
–1.27
–1.36
–1.46
–1.55
–1.64
–1.67
–1.73
–1.82
–1.90
–1.91
–2.01
–2.10
–2.19
–2.29
–2.38
–2.47
1.28
1.37
1.45
1.54
1.62
1.71
1.79
1.88
1.96
2.04
2.13
2.21
2.30
2.38
2.46
A-17