cx25870 Conexant Systems, Inc., cx25870 Datasheet - Page 231

• 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-25. Overscan Values 1024 x 768 PAL-BDGHI, Pixel-Based Controller, 1-Pixel Resolution, >3 !s Hblank (1 of 3)
100381B
H_CLKI
1425
1410
1425
1425
1425
1425
1425
1400
1400
1440
1395
1455
1450
1375
1380
1375
1375
1375
1375
1375
1375
1375
1375
1470
1365
1475
1485
1350
1350
1350
1350
Graphics Controller
Total
V_LINESI
1000
1000
1050
1025
1050
1000
1000
1000
1065
1000
1020
1050
1035
1005
1000
1000
1000
1025
1050
1000
950
925
975
975
975
975
990
960
945
975
975
V_ACTIVEO
Active
240
240
229
253
260
235
247
247
229
240
240
240
247
226
240
236
229
247
243
232
239
250
254
240
240
247
240
235
229
247
240
Encoder Pixels
Conexant
H_CLKO
Total
1520
1504
1596
1444
1406
1558
1482
1456
1568
1536
1488
1552
1508
1562
1472
1496
1540
1430
1452
1518
1474
1408
1386
1568
1456
1534
1584
1476
1512
1404
1440
Appendix A Scaling and I/0 Timing Register Calculations
Horizontal
17.09
21.03
12.72
10.36
19.11
14.96
13.44
19.62
17.95
18.79
16.43
19.31
14.38
15.75
18.16
11.87
16.98
10.49
19.62
13.44
17.84
20.44
14.61
16.65
10.23
12.48
16.2
15.3
13.2
14.5
9.07
Overscan (Percent)
Vertical
16.67
16.67
20.49
12.15
14.24
14.24
20.49
16.67
16.67
16.67
14.24
21.53
16.67
18.06
20.49
14.24
15.62
19.44
17.01
13.19
11.81
16.67
16.67
14.24
16.67
20.49
14.24
16.67
9.72
18.4
18.4
Delta
-0.46
-0.86
-1.36
-2.21
-2.29
-2.32
-2.37
-2.42
-2.47
-2.52
-2.74
-3.23
-3.79
-3.84
-4.19
0.42
0.55
0.57
0.64
0.72
1.28
2.13
2.19
2.96
3.61
3.77
-0.8
-2.3
-2.7
0.7
-4
A-49