cx25870 Conexant Systems, Inc., cx25870 Datasheet - Page 229

• Manufacturer Part Number: cx25870
• Description: Video Encoder With Adaptive Flicker Filtering And Hdtv Output
• Manufacturer: Conexant Systems, Inc.

CX25870/871
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)
100381B
H_CLKI
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
Controller Pixels
Total
V_LINESI
1015
1050
1050
1050
1050
1050
1025
1000
1050
1025
1000
1050
1015
1001
945
980
975
925
950
950
975
980
945
987
973
959
994
980
966
952
V_ACTIVEO
Active
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
Encoder Pixels
Conexant
H_CLKO
Total
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
Appendix A Scaling and I/0 Timing Register Calculations
Horizontal
18.04
11.97
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
14.17
18.26
11.97
21.07
18.26
15.23
12.34
13.57
11.08
12.96
11.72
10.44
9.65
9.78
9.12
Overscan (Percent)
Vertical
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
Delta
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
0.03
0.39
0.98
1.74
1.79
1.80
1.81
2.06
2.97
3.03
3.29
0.07
0.11
0.22
0.83
1.45
2.09
2.67
2.69
2.70
2.73
2.85
3.30
3.30
3.32
3.39
3.50
3.51
3.56
3.64
A-47