cx25870 Conexant Systems, Inc., cx25870 Datasheet - Page 220

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

Appendix A Scaling and I/0 Timing Register Calculations
Table A-19. Overscan Values 800 x 600 PAL-BDGHI, Pixel-Based Controller, 1-Pixel Resolution, 3:2 Clocking Mode (1 of
3)
A-38
H_CLKI
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
Controller Pixels
Total
V_LINESI
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
V_ACTIVEO
Active
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
Encoder Pixels
Conexant
H_CLKO
Total
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
Flicker-Free Video Encoder with Ultrascale Technology
Horizontal
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
Overscan (Percent)
Vertical
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
CX25870/871
Delta
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
0.13
0.44
0.44
0.58
0.63
0.65
0.74
1.04
1.34
1.63
1.92
2.22
2.51
2.79
0.17
0.48
0.75
0.79
1.11
1.42
1.74
2.06
2.21
2.32
2.34
2.38
2.39
2.50
2.70
3.03
100381B