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 (3 of
3)
Controller Pixels
Total
Encoder Pixels
Overscan (Percent)
Active
Total
H_CLKI
V_LINESI
V_ACTIVEO
H_CLKO
Horizontal
Vertical
Delta
1515
1520
1525
1530
1535
1540
1300
1545
1550
1555
1560
1565
1570
1275
1575
1275
1575
1250
1250
1250
1250
1250
1250
1250
1250
1625
750
750
750
750
750
750
825
750
750
750
750
750
750
825
750
800
725
822
825
828
831
834
813
816
819
720
250
250
250
250
250
250
228
250
250
250
250
250
250
228
250
235
259
229
228
227
226
225
231
230
229
261
1212
1216
1220
1224
1228
1232
1144
1236
1240
1244
1248
1252
1256
1122
1260
1088
1218
1096
1100
1104
1108
1112
1084
1088
1092
1248
18.76
19.03
19.29
19.56
19.82
20.08
13.93
20.34
20.60
20.85
21.10
21.36
21.61
12.24
21.86
9.50
13.19
13.19
13.19
13.19
13.19
13.19
20.83
13.19
13.19
13.19
13.19
13.19
13.19
20.83
13.19
18.40
10.07
20.49
20.83
21.18
21.53
21.88
19.79
20.14
20.49
9.38
5.57
5.83
6.10
6.36
6.63
6.89
–6.90
7.14
7.40
7.66
7.91
8.16
8.41
–8.59
8.66
–8.90
9.09
19.16
10.16
10.49
10.81
11.14
11.46
9.17
–10.32
–10.34
–10.37
–10.39
–10.42
–10.62
–10.64
–10.65
11.73
9.50
9.83
21.10
A-40
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
