Appendix A Scaling and I/0 Timing Register Calculations
CX25870/871
Flicker-Free Video Encoder with Ultrascale Technology
Figure A-7. Allowable Overscan Compensation Ratios for Dual Display, 1024x768 Input, NTSC Output
22
20
4 us
18
16
14
12
10
8
3 us
2 us 1.75 us 1.5 us 1 us Horizontal Blanking
10 12 14
Vertical Overscan Compensation Percentage
0 us
20
8
16
18
22
LEGEND
= Pixel Clock Solution
= 8-Cycle Character Clock Solution
= 9-Cycle Character Clock Solution
NOTE(S):
Use this chart for PAL-M and PAL-60 allowable overscan ratios.
100381_063
A-10
Conexant
100381B