Appendix A Scaling and I/0 Timing Register Calculations
CX25870/871
Flicker-Free Video Encoder with Ultrascale Technology
Table A-16. Overscan Values, 800 x 600 PAL-BDGHI, Pixel-Based Controller, 1-Pixel Resolution, >2.5 µs HBlank (1 of 2)
Controller Pixels
Total
Encoder Pixels
Active
Overscan (Percent)
Total
H_CLKI
V_LINESI
V_ACTIVEO
H_CLKO
Horizontal
Vertical
Resolution
945
950
950
940
950
950
950
955
935
960
930
925
925
965
925
925
970
920
975
975
975
915
975
980
910
985
900
905
900
990
900
750
750
775
750
725
800
825
750
750
750
750
825
800
750
775
750
750
750
775
750
800
750
725
750
750
750
825
750
800
750
775
250
250
242
250
259
235
228
250
250
250
250
228
235
250
242
250
250
250
242
250
235
250
259
250
250
250
228
250
235
250
242
1134
1140
1178
1128
1102
1216
1254
1146
1122
1152
1116
1221
1184
1158
1147
1110
1164
1104
1209
1170
1248
1098
1131
1176
1092
1182
1188
1086
1152
1188
1116
13.17
13.63
16.42
12.71
10.65
19.03
21.48
14.08
12.24
14.53
11.77
19.36
16.84
14.97
14.16
11.30
15.41
10.81
18.56
15.84
21.10
10.33
12.94
16.27
9.83
13.19
13.19
15.97
13.19
10.07
18.40
20.83
13.19
13.19
13.19
13.19
20.83
18.40
13.19
15.97
13.19
13.19
13.19
15.97
13.19
18.40
13.19
10.07
13.19
13.19
13.19
20.83
13.19
18.40
13.19
15.97
–0.02
0.44
0.44
–0.48
0.58
0.63
0.65
0.89
–0.95
1.34
–1.42
–1.47
–1.56
1.78
–1.81
–1.90
2.22
–2.38
2.59
2.65
2.70
–2.87
2.87
3.08
–3.36
3.50
16.70
17.12
9.34
–3.71
–3.86
–3.87
3.93
14.53
17.12
11.77
–4.20
A-34
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
