CX25870/871
Appendix A Scaling and I/0 Timing Register Calculations
Flicker-Free Video Encoder with Ultrascale Technology
Table A-8. Overscan Values, 640 x 480 PAL-BDGHI, Character Clock-Based Controller, 8-Pixel Resolution, 2.5 µs HBlank
Controller Pixels
Total
Encoder Pixels
Active
Overscan (Percent)
Total
H_CLKI
V_LINESI
V_ACTIVEO
H_CLKO
Horizontal
Vertical
Resolution
944
952
625
625
625
625
625
625
625
625
625
625
625
625
625
625
620
615
610
605
600
630
575
580
585
590
595
625
625
625
625
240
240
240
240
240
240
240
240
240
240
240
240
240
240
242
244
246
248
250
239
261
259
257
255
253
240
240
240
240
944
952
936
960
928
968
920
976
912
984
904
992
1000
896
992
984
976
968
960
1008
920
928
936
944
952
1008
888
880
872
16.56
17.26
15.84
17.95
15.12
18.63
14.38
19.29
13.63
19.95
12.87
20.60
21.23
12.09
20.60
19.95
19.29
18.63
17.95
21.86
14.38
15.12
15.84
16.56
17.26
21.86
11.30
10.49
9.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
16.67
15.97
15.28
14.58
13.89
13.19
17.01
9.38
–0.11
0.59
–0.82
1.28
–1.55
1.96
–2.29
2.63
–3.04
3.28
–3.80
3.93
4.56
–4.58
4.62
4.67
4.71
4.74
4.75
4.84
5.01
5.05
5.08
5.10
5.11
5.19
–5.37
–6.18
–7.00
936
960
928
968
920
976
912
984
904
992
1000
896
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1008
888
10.07
10.76
11.46
12.15
16.67
16.67
16.67
16.67
880
872
100381B
Conexant
A-19
CONEXANT [ CONEXANT SYSTEMS, INC ]
