cx25870 Conexant Systems, Inc., cx25870 Datasheet - Page 223

• 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-20. Overscan Values 800 x 600 PAL-BDGHI, Character Clock-Based Controller, 8-Pixel Resolution, 3:2 Clocking
Mode
Table A-21. Overscan Values 800 x 600 PAL-BDGHI, Character Clock-Based Controller, 9-Pixel Resolution, 3:2 Clocking
Mode
100381B
H_CLKI
H_CLKI
1400
1400
1440
1480
1360
1520
1560
1440
1395
1350
1350
1485
1350
1530
1575
1575
Controller Pixels
Controller Pixels
Total
Total
V_LINESI
V_LINESI
825
750
750
750
750
750
750
750
750
825
800
750
775
750
750
725
V_ACTIVEO
V_ACTIVEO
Active
Active
228
250
250
250
250
250
250
250
250
228
235
250
242
250
250
259
Encoder Pixels
Encoder Pixels
Conexant
H_CLKO
H_CLKO
Total
Total
1232
1120
1152
1184
1088
1216
1248
1152
1116
1188
1152
1188
1116
1224
1260
1218
Appendix A Scaling and I/0 Timing Register Calculations
Horizontal
Horizontal
20.08
12.09
14.53
16.84
19.03
21.10
14.53
11.77
17.12
14.53
17.12
11.77
19.56
21.86
19.16
9.50
Overscan (Percent)
Overscan (Percent)
Vertical
Vertical
20.83
13.19
13.19
13.19
13.19
13.19
13.19
13.19
13.19
20.83
18.40
13.19
15.97
13.19
13.19
10.07
Delta
Delta
–
–
–
–
–
–
–
1.34
3.65
5.83
7.91
1.34
3.93
6.36
8.66
9.09
0.75
1.11
3.69
1.42
3.71
3.87
4.20
A-41