CX25870/871
Appendix A Scaling and I/0 Timing Register Calculations
Flicker-Free Video Encoder with Ultrascale Technology
Table A-13. Overscan Values 800 x 600 NTSC, Pixel-Based Controller, 1-Pixel Resolution, 3:2 Clocking Mode (3 of 4)
Controller Pixels
Total
Encoder Pixels
Overscan (Percent)
Active
Total
H_CLKI
V_LINESI
V_ACTIVEO
H_CLKO
Horizontal
Vertical
Delta
1113
1230
1239
1100
1245
1250
1092
1260
1260
1260
1260
1260
1260
1260
1260
1085
1260
1260
1260
1260
1080
1075
1275
1281
1275
1275
1071
1071
1290
1295
1050
825
735
750
819
735
756
825
765
750
770
755
740
760
730
745
810
720
735
725
715
805
819
756
750
735
714
825
800
735
720
828
191
215
210
193
215
209
191
206
210
205
209
213
208
216
212
195
219
215
218
221
196
193
209
210
215
221
191
197
215
219
191
1166
1148
1180
1144
1162
1200
1144
1224
1200
1232
1208
1184
1216
1168
1192
1116
1152
1176
1160
1144
1104
1118
1224
1220
1190
1156
1122
1088
1204
1184
1104
17.19
15.89
18.17
15.59
16.90
19.53
15.59
21.11
19.53
21.62
20.07
18.45
20.59
17.33
18.99
13.48
16.18
17.89
16.76
15.59
12.54
13.63
21.11
20.85
18.86
16.47
13.94
11.25
19.80
18.45
12.54
21.40
11.52
13.58
20.58
11.52
13.99
21.40
15.23
13.58
15.64
13.99
12.35
14.40
11.11
12.76
19.75
9.88
–4.21
4.37
4.59
–4.98
5.38
5.54
–5.81
5.88
5.95
5.99
6.07
6.10
6.19
6.22
6.24
–6.28
6.30
6.37
6.47
6.54
–6.81
–6.95
7.12
7.27
7.33
7.42
–7.46
–7.68
8.28
8.57
–8.86
11.52
10.29
9.05
19.34
20.58
13.99
13.58
11.52
9.05
21.40
18.93
11.52
9.88
21.40
100381B
Conexant
A-29
CONEXANT [ CONEXANT SYSTEMS, INC ]
