cx25870 Conexant Systems, Inc., cx25870 Datasheet - Page 196

• 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
Table A-5. Overscan Values, 640 x 480 NTSC, Character Clock-Based Controller, 8-Pixel Resolution, 2.5 µs HBlank
A-14
H_CLKI
784
800
800
800
760
840
840
840
840
840
840
840
840
720
840
840
720
Controller Pixels
Total
V_LINESI
600
630
609
588
630
615
600
610
595
605
590
585
580
665
575
570
630
V_ACTIVEO
Active
210
200
207
215
200
205
210
207
212
209
214
216
218
190
220
222
200
Encoder Pixels
Conexant
H_CLKO
Total
896
960
928
896
912
984
960
976
952
968
944
936
928
912
920
912
864
Flicker-Free Video Encoder with Ultrascale Technology
Horizontal
13.79
19.53
16.76
13.79
15.30
21.50
19.53
20.85
18.86
20.20
18.17
17.47
16.76
15.30
16.03
15.30
10.59
Overscan (Percent)
Vertical
13.58
17.70
14.81
11.52
17.70
15.64
13.58
14.81
12.76
13.99
11.93
11.11
10.29
21.81
17.70
9.47
8.64
CX25870/871
Resolution
–2.40
–6.51
–7.10
100381B
0.21
1.84
1.94
2.26
5.86
5.95
6.04
6.10
6.21
6.23
6.36
6.47
6.57
6.66