Service manual

6
2-1-2 NTSC/PAL Digital Video Encoder (AV3168)
FEATURES
• Fully CCIR 624 performance compliance NTSC and
PAL (B,D,G,H,I,M and N) video encoder.
• Composite, S-video, Component Y/Cb/Cr (Sony,
Matsushita, and SMPTE) or RGB output.
• Triple 10-bit digital to analog converter.
• Accepts 27 Mhz multiplexed 8-bit digital video inputs.
• Master or Slave 4-Field NTSC or 8-Field PAL video
timing generation.
• CCIR 656 EAV SYNC extraction.
• Automatic NTSC or PAL timing detection in slave
mode operation.
• Automatic or User Programmable Chroma Filter
Selection.
• Macrovision Anti-Tapping Rev 7.01 support in
AV3168 Only.
• Closed Caption Support.
• Contrast and Brightness control.
Clock Generation
• 3 outputs for 27 MHz video clock, 16.934, 18.432 and
36.864 Mhz audio clock, and 40.5, 54.0, 67.5 and
81.0 MHz general purpose clocks.
• Requires a single 27 Mhz crystal.
General
• CVBS and S-video DAC power down controls.
• I
2
C compatible serial control bus.
• Single +5 volt power supply.
Application
• Digital Video Disk (DVD)
• Digital Set-Top Box
• PC Video, Multimedia
Ordering Information
AV3168/69-CL 44-pin PLCC
AV3168/69-CQ 44-pin TQFP
DESCRIPTION
The AV3168 is a mixed signal CMOS monolithic device. It comprise with a PAL and NTSC Video Encoder, Color
Space Converter and Clock Generator, The Clock Generator outputs a video, an audio and a programmable
general purpose clock. This IC implemented Macrovision Anti-tapping 7.01, intended for DVD and Settop Box
applications.
The video encoder converts CCIR 601 8-bit multiplexed digital video into RGB, component YCbCr, encoded NTSC
or PAL (BDGHIMN) signals. It contains three 10-bit DACs to support simultaneous S-video and composite video;
or component video display. Brightness and Contrast control are also provided.