Appendix A Scaling and I/0 Timing Register Calculations
CX25870/871
Flicker-Free Video Encoder with Ultrascale Technology
Table A-12. Overscan Values, 800 x 600 NTSC, Character Clock-Based Controller, 9-Pixel Resolution, 0–3.0 µs HBlank
Controller Pixels
Total
Encoder Pixels
Overscan (Percent)
Active
Total
H_CLKI
V_LINESI
V_ACTIVEO
H_CLKO
Horizontal
Vertical
Resolution
810
810
810
819
819
819
819
855
855
882
882
900
900
900
900
805
770
735
800
750
775
725
770
735
750
725
735
728
721
714
196
205
215
197
210
204
218
205
215
210
218
215
217
219
221
1242
1188
1134
1248
1170
1209
1131
1254
1197
1260
1218
1260
1248
1236
1224
22.25
18.72
14.85
22.63
17.47
20.13
14.62
23.00
19.33
23.36
20.72
23.36
22.63
21.88
21.11
19.34
15.64
11.52
18.93
13.58
16.05
10.29
15.64
11.52
13.58
10.29
11.52
10.70
9.88
2.91
3.08
3.33
3.70
3.89
4.08
4.34
7.36
7.81
9.78
10.43
11.84
11.93
12.00
12.06
9.05
A-26
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
