CX25870/871
Appendix A Scaling and I/0 Timing Register Calculations
Flicker-Free Video Encoder with Ultrascale Technology
Table A-24. Overscan Values 1024 x 768 NTSC, Character Clock-Based Controller, 9-Pixel Resolution (1 of 2)
Controller Pixels
Total
Encoder Pixels
Overscan (Percent)
Active
Total
H_CLKI
V_LINESI
V_ACTIVEO
H_CLKO
Horizontal
Vertical
Delta
1170
1170
1170
1170
1179
1161
1188
1152
1197
1197
1197
1197
1197
1143
1134
1134
1134
1134
1134
1215
1215
1215
1125
1125
1125
1125
1125
1125
1125
1125
945
1015
980
214
199
206
192
192
192
192
192
197
207
218
202
213
192
197
213
202
192
207
199
206
214
205
202
208
211
203
206
209
212
1404
1508
1456
1560
1572
1548
1584
1536
1558
1482
1406
1520
1444
1524
1476
1368
1440
1512
1404
1566
1512
1458
1410
1430
1390
1370
1420
1400
1380
1360
11.97
18.04
15.11
20.77
21.38
20.16
21.97
19.53
20.67
16.60
12.09
18.69
14.41
18.90
16.26
9.65
11.93
18.11
15.23
20.99
20.99
20.99
20.99
20.99
18.93
14.81
10.29
16.87
12.35
20.99
18.93
12.35
16.87
20.99
14.81
18.11
15.23
11.93
15.64
16.87
14.40
13.17
16.46
15.23
13.99
12.76
0.03
–0.07
–0.11
–0.22
0.39
1050
1050
1050
1050
1050
1025
975
–0.83
0.98
–1.45
1.74
1.79
925
1.80
1000
950
1.81
2.06
1050
1025
950
–2.09
–2.67
–2.69
–2.70
–2.73
–2.85
2.97
1000
1050
975
14.17
18.26
11.97
21.07
18.26
15.23
12.34
13.57
11.08
9.78
1015
980
3.03
945
3.29
987
–3.30
–3.30
–3.32
–3.39
–3.50
–3.51
–3.56
–3.64
1001
973
959
994
12.96
11.72
10.44
9.12
980
966
952
100381B
Conexant
A-47
CONEXANT [ CONEXANT SYSTEMS, INC ]
