Appendix A Scaling and I/0 Timing Register Calculations
CX25870/871
Flicker-Free Video Encoder with Ultrascale Technology
Table A-19. Overscan Values 800 x 600 PAL-BDGHI, Pixel-Based Controller, 1-Pixel Resolution, 3:2 Clocking Mode (1 of
3)
Controller Pixels
Total
Encoder Pixels
Overscan (Percent)
Active
Total
H_CLKI
V_LINESI
V_ACTIVEO
H_CLKO
Horizontal
Vertical
Delta
1420
1415
1425
1425
1410
1425
1425
1425
1430
1400
1405
1435
1400
1440
1395
1445
1390
1450
1385
1375
1455
1375
1375
1380
1375
1375
1460
1375
1465
1370
750
750
750
775
750
725
800
825
750
825
750
750
750
750
750
750
750
750
750
825
750
810
765
750
780
795
750
750
750
750
250
250
250
242
250
259
235
228
250
228
250
250
250
250
250
250
250
250
250
228
250
232
246
250
241
236
250
250
250
250
1136
1132
1140
1178
1128
1102
1216
1254
1144
1232
1124
1148
1120
1152
1116
1156
1112
1160
1108
1210
1164
1188
1122
1104
1144
1166
1168
1100
1172
1096
13.33
13.02
13.63
16.42
12.71
10.65
19.03
21.48
13.93
20.08
12.40
14.23
12.09
14.53
11.77
14.83
11.46
15.12
11.14
18.63
15.41
17.12
12.24
10.81
13.93
15.56
15.70
10.49
15.99
10.16
13.19
13.19
13.19
15.97
13.19
10.07
18.40
20.83
13.19
20.83
13.19
13.19
13.19
13.19
13.19
13.19
13.19
13.19
13.19
20.83
13.19
19.44
14.58
13.19
16.32
18.06
13.19
13.19
13.19
13.19
0.13
–0.17
0.44
0.44
–0.48
0.58
0.63
0.65
0.74
–0.75
–0.79
1.04
–1.11
1.34
–1.42
1.63
–1.74
1.92
–2.06
–2.21
2.22
–2.32
–2.34
–2.38
–2.39
–2.50
2.51
–2.70
2.79
–3.03
A-38
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
