CX25870/871
Appendix A Scaling and I/0 Timing Register Calculations
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
Controller Pixels
Total
Encoder Pixels
Overscan (Percent)
Active
Total
H_CLKI
V_LINESI
V_ACTIVEO
H_CLKO
Horizontal
Vertical
Delta
1400
1400
1440
1480
1360
1520
1560
825
750
750
750
750
750
750
228
250
250
250
250
250
250
1232
1120
1152
1184
1088
1216
1248
20.08
12.09
14.53
16.84
9.50
20.83
13.19
13.19
13.19
13.19
13.19
13.19
–0.75
–1.11
1.34
3.65
–3.69
5.83
19.03
21.10
7.91
Table A-21. Overscan Values 800 x 600 PAL-BDGHI, Character Clock-Based Controller, 9-Pixel Resolution, 3:2 Clocking
Mode
Controller Pixels
Total
Encoder Pixels
Overscan (Percent)
Active
Total
H_CLKI
V_LINESI
V_ACTIVEO
H_CLKO
Horizontal
Vertical
Delta
1440
1395
1350
1350
1485
1350
1530
1575
1575
750
750
825
800
750
775
750
750
725
250
250
228
235
250
242
250
250
259
1152
1116
1188
1152
1188
1116
1224
1260
1218
14.53
11.77
17.12
14.53
17.12
11.77
19.56
21.86
19.16
13.19
13.19
20.83
18.40
13.19
15.97
13.19
13.19
10.07
1.34
–1.42
–3.71
–3.87
3.93
–4.20
6.36
8.66
9.09
100381B
Conexant
A-41
CONEXANT [ CONEXANT SYSTEMS, INC ]
