cx25870 Conexant Systems, Inc., cx25870 Datasheet - Page 186

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

Appendix A Scaling and I/0 Timing Register Calculations
Figure A-1. Allowable Overscan Compensation Ratios for Dual Display, 640x480 Input, NTSC Output with 20 Clock
HBlank Period
A-4
NOTE(S):
Use this chart for PAL-M and PAL-60 allowable overscan ratios.
Legend:
= Pixel Clock Solution
= 8-Cycle Character Clock Solution
= 9-Cycle Character Clock Solution
22
20
18
16
14
12
10
8
8
10
Overscan Compensation Pecentage Pairs for 640x480 NTSC
12
Vertical Overscan Compensation Percentage
14
Conexant
Flicker-Free Video Encoder with Ultrascale Technology
16
18
20
CX25870/871
22
100381B
100381_026