Appendix A Scaling and I/0 Timing Register Calculations
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 (3 of 3)
Controller Pixels
Total
Encoder Pixels
Active
Overscan (Percent)
Total
H_CLKI
V_LINESI
V_ACTIVEO
H_CLKO
Horizontal
Vertical
Resolution
975
917
976
975
916
977
915
978
975
914
979
913
980
625
625
625
600
625
625
625
625
575
625
625
625
625
240
240
240
250
240
240
240
240
261
240
240
240
240
975
917
976
936
916
977
915
978
897
914
979
913
980
19.21
14.10
19.29
15.84
14.01
19.38
13.91
19.46
12.19
13.82
19.54
13.72
19.62
16.67
16.67
16.67
13.19
16.67
16.67
16.67
16.67
9.38
2.54
–2.57
2.63
2.65
–2.66
2.71
–2.75
2.79
2.81
16.67
16.67
16.67
16.67
–2.85
2.87
–2.94
2.96
A-18
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
