cx25870 Conexant Systems, Inc., cx25870 Datasheet - Page 197

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