Chrontel CH7034B Note applicative - Pagina 8

Sfoglia online o scarica il pdf Note applicative per Convertitore multimediale Chrontel CH7034B. Chrontel CH7034B 18. Hdtv/vga/lvds encoder

CHRONTEL

AN-B013

 YPbPr and RGB + Csync output

CH7034B supports both RGB+Csync and HDTV YPbPr output format. The resolution is from 480P to 720P and

1080i and 1080P. In RGB+Csync output format, the Csync high level is the same with AVDD power supply. Csync

pin is a COMS push-pull output pin, customer can use other circuit to change is high level to 0.7V or other voltage

level according to different Receivers. ( Refer to Figure 9)

 VGA output

VGA standard output signal level of Hsync and Vsync is more than 2.4V. CH7034B Hsync and Vsync output signal

level is same with AVDD power supply. Customer can use 74ACT08 (AND GATE) to pull high this signal level to

5V(recommend to add the diode).. It is recommended but not necessary. ( Refer to Figure 9)

206-1000-013

Rev1.4,

06/30/2020