ch7009b Chrontel, ch7009b Datasheet - Page 16

• Manufacturer Part Number: ch7009b
• Description: Ch7009 Dvi / Tv Output Device
• Manufacturer: Chrontel

CHRONTEL
5.3 NTSC and PAL Operation
Composite and S-Video outputs are supported in either NTSC or PAL format. The general parameters used to characterize
these outputs are listed in Table 9 and shown in Figure 8. (See Figures 11 through 16 for illustrations of composite and S-
Video output waveforms).
16
Table 8. NTSC/PAL Composite Output Timing Parameters (in ms)
Symbol
G
A
A
B
C
D
E
H
F
1. Durations vary slightly in different modes due to the different clock frequencies used.
2. Active video and black (F, G, H) times vary greatly due to different scaling ratios used in different modes.
3. Black times (F and H) vary with position controls.
Description
A
Front Porch
Horizontal Sync
Breezeway
Color Burst
Back Porch
Black
Active Video
Black
B
C
D
Figure 8. NTSC / PAL Composite Output
E
F
NTSC
287
287
287
287
340
340
340
0
G
Level (mV)
H
PAL
300
300
300
300
300
300
300
0
201-0000-035 Rev 3.31, 11/4/2004
1.49 - 1.51
4.69 - 4.72
0.59 - 0.61
2.50 - 2.53
1.55 - 1.61
0.00 - 7.50
37.66 - 52.67
0.00 - 7.50
NTSC
Duration (uS)
CH7009B
1.48 - 1.51
4.69 - 4.71
0.88 - 0.92
2.24 - 2.26
2.62 - 2.71
0.00 - 8.67
34.68 - 52.01
0.00 - 8.67
PAL