Appendix A Scaling and I/0 Timing Register Calculations
CX25870/871
Flicker-Free Video Encoder with Ultrascale Technology
Table A-26. 1024 x 768 PAL-BDGHI, Character Clock-Based Controller, 8-Pixel Resolution, >4 µs Hblank
Controller Pixels
Total
Encoder Pixels
Overscan (Percent)
Active
Total
H_CLKI
V_LINESI
V_ACTIVEO
H_CLKO
Horizontal
Vertical
Delta
1400
1400
1440
1320
975
247
229
240
240
1456
1568
1536
1408
13.44
19.62
17.95
10.49
14.24
20.49
16.67
16.67
-0.8
-0.86
1.28
1050
1000
1000
-6.18
Table A-27. Overscan Values 1024 x 768 PAL-BDGHI, Character Clock-Based Controller, 9-Pixel Resolution
Controller Pixels
Total
Encoder Pixels
Overscan (Percent)
Active
Total
H_CLKI
V_LINESI
V_ACTIVEO
H_CLKO
Horizontal
Vertical
Delta
1440
1395
1485
1350
1350
1350
1350
1305
1575
1575
1000
1000
1000
1025
1050
975
240
240
240
235
229
247
240
240
253
260
1536
1488
1584
1476
1512
1404
1440
1392
1596
1554
17.95
15.3
16.67
16.67
16.67
18.4
1.28
-1.36
3.77
-3.79
-3.84
-4
20.44
14.61
16.65
10.23
12.48
9.46
20.49
14.24
16.67
16.67
12.15
9.72
1000
1000
950
-4.19
-7.21
8.88
9.18
21.03
18.9
925
A-52
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
