cx25870 Conexant Systems, Inc., cx25870 Datasheet - Page 221

• 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-19. Overscan Values 800 x 600 PAL-BDGHI, Pixel-Based Controller, 1-Pixel Resolution, 3:2 Clocking Mode (2 of
3)
100381B
H_CLKI
1470
1365
1475
1480
1360
1350
1350
1485
1355
1350
1490
1495
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1505
1500
1500
1500
1500
1500
1325
1510
Controller Pixels
Total
V_LINESI
750
750
750
750
750
825
800
750
750
775
750
750
785
775
750
780
760
770
745
730
755
765
750
740
725
720
735
715
825
750
V_ACTIVEO
Active
250
250
250
250
250
228
235
250
250
242
250
250
239
242
250
241
247
244
252
257
249
246
250
254
259
261
256
263
228
250
Encoder Pixels
Conexant
H_CLKO
Total
1176
1092
1180
1184
1088
1188
1152
1188
1084
1116
1192
1196
1256
1240
1200
1248
1216
1232
1192
1168
1208
1224
1204
1184
1160
1152
1176
1144
1166
1208
Appendix A Scaling and I/0 Timing Register Calculations
Horizontal
16.27
16.56
16.84
17.12
14.53
17.12
11.77
17.40
17.67
21.61
20.60
17.95
21.10
19.03
20.08
17.40
15.70
18.49
19.56
18.22
16.84
15.12
14.53
16.27
13.93
15.56
18.49
9.83
9.50
9.17
Overscan (Percent)
Vertical
13.19
13.19
13.19
13.19
13.19
20.83
18.40
13.19
13.19
15.97
13.19
13.19
17.01
15.97
13.19
16.32
14.24
15.28
12.50
10.76
13.54
14.58
13.19
11.81
10.07
11.11
20.83
13.19
9.38
8.68
Delta
–
–
–
–
–
–
–
3.08
3.36
3.65
3.93
4.20
4.48
4.59
4.62
4.75
4.79
4.79
4.80
4.90
4.94
4.95
4.97
5.03
5.03
5.05
5.15
5.16
5.25
5.30
3.36
3.69
3.71
3.87
4.03
4.20
5.28
A-39