Appendix A Scaling and I/0 Timing Register Calculations
CX25870/871
Flicker-Free Video Encoder with Ultrascale Technology
Table A-1. Target Video Parameters for Standard Definition TV Output Formats (1 of 2)
Parameter
Description
PAL-
B,D,G,H,I
NTSC-M
4.7
0.286
NTSC-J
4.7
PAL-M
4.7
PAL-60
4.7
PAL-N
4.7
PAL-Nc
4.7
SECAM
4.7
HSYNC Width
(µs)
4.7
HSYNC and
VSYNC Height (V)
0.286
150
0.287
150
0.3
0.3
0.2857
200
0.3
0.3
200(1)
HSYNC Rise/Fall 150
Time (10% to
150
200
200
90%) (ns)
Burst or
5.3
5.3
5.8
5.3
5.6
5.6
5.6
5.6
Subcarrier Start
(µs)
Burst Width (µs) 2.514
2.514
2.52
2.25
2.25
2.25
2.51
N/A
(9 cycles) (9 cycles) (9cycles)
(10 cycles) (10 cycles) (10 cycles) (9 cycles)
Subcarrier
3579545
0.2857
3579545
0.2857
3579611.49 4433618.75 4433618.75 4433618.75 3582056.25 for=4406250
fob=4250000
Frequency(5) (Hz)
Burst or
0.306
0.3
0.3
0.3
0.3
0.161
Subcarrier Height
(V)
Phase Alternation NO
NO
YES
525
YES
525
YES
625
YES
625
YES
625
NO
Number of Lines 525
per Frame
525
625
Line Frequency
(Hz)
15734.264 15734.264 15734.264 15734.264 15625
15625
50
15625
50
15625
50
Field Frequency
(Hz)
59.94
59.94
59.94
59.94
50
Setup
YES
NO
YES
NO
NO
YES
NO
NO
22(3)
262(3)
22(3)
262(3)
22(3)
22(3)
23(4)
309(4)
23(4)
309(4)
23(4)
23(4)
First Active Line
262(3)
9.2
262(3)
9.2
309(4)
10.5
309(4)
10.5
Last Active Line
HSYNC to Blank
9.2[9.037] 9.2
10.5[9.778] 9.2
End (µs)
Blank Begin to
HSYNC (µs)
1.5[1.185] 1.5
1.5
1.5
0.7
1.5[0.889] 1.5
1.5
0.7
1.5
0.7
Black to 100%
White (V)
0.661
0.714
0.661
0.7
0.661
A-2
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
