cx25870 Conexant Systems, Inc., cx25870 Datasheet - Page 232

• Manufacturer Part Number: cx25870
• Description: Video Encoder With Adaptive Flicker Filtering And Hdtv Output
• Manufacturer: Conexant Systems, Inc.

Appendix A Scaling and I/0 Timing Register Calculations
Table A-25. Overscan Values 1024 x 768 PAL-BDGHI, Pixel-Based Controller, 1-Pixel Resolution, >3 !s Hblank (2 of 3)
A-50
H_CLKI
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1500
1335
1500
1500
1515
1325
1320
1525
1300
1305
1550
1275
1275
1575
Graphics Controller
Total
V_LINESI
1000
1005
1010
1000
1000
1050
1000
1050
1000
1050
1025
980
985
960
990
965
945
995
970
950
975
935
920
955
940
925
930
915
975
975
950
V_ACTIVEO
Active
240
239
238
245
244
250
243
249
254
242
248
253
247
257
261
252
256
260
240
259
263
240
229
240
247
229
240
247
229
235
253
Encoder Pixels
Conexant
H_CLKO
Total
1600
1608
1616
1568
1576
1536
1584
1544
1512
1592
1552
1520
1560
1496
1472
1528
1504
1480
1424
1488
1464
1616
1484
1408
1586
1456
1392
1612
1428
1394
1596
Flicker-Free Video Encoder with Ultrascale Technology
Horizontal
22.01
15.07
10.49
11.74
21.23
21.62
22.01
19.62
20.03
17.95
20.44
18.37
16.65
20.83
18.79
17.09
19.21
15.75
14.38
17.52
14.84
13.91
20.54
13.44
21.82
21.03
16.2
11.5
15.3
9.46
9.59
Overscan (Percent)
Vertical
16.67
17.01
17.36
14.93
15.28
13.19
15.62
13.54
11.81
15.97
13.89
12.15
14.24
10.76
11.11
16.67
10.07
16.67
20.49
16.67
14.24
20.49
16.67
14.24
20.49
12.15
9.38
12.5
9.72
8.68
18.4
CX25870/871
Delta
-5.17
-5.41
-6.18
-7.05
-7.21
-8.74
-8.81
4.56
4.61
4.65
4.69
4.75
4.75
4.81
4.83
4.84
4.86
4.91
4.93
4.97
4.99
5.01
5.02
5.09
5.12
5.23
5.23
5.34
7.58
8.88
6.3
100381B