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N/B Maintenance
N/B Maintenance
The CH7019 is a Display Controller device which accepts two digital graphics input data streams. One data
stream outputs through an LVDS transmitter to an LCD panel, while the other data stream is encoded for NTSC
or PALTV and outputs through a 10-bit high speed DAC. The TV encoder device encodes a graphics signal up
to 1024x768 resolution and outputs the video signals according to NTSC or PAL standards. The LVDS
transmitter operates at pixel speeds up to 165MHz per link, supporting 1600x1200 panels at 60Hz refresh rate.
1.2.4 CH7019 TV Encoder / LVDS Transmitter
General Description
The device can also accept one graphics data stream over two 12-bit wide variable voltage ports which support
nine different data formats including RGB and YCrCb (RGB must be used for LVDS output). A maximum of
330M pixels per second can be output through dual LVDS links.
The TV-Out processor will perform non-interlaced to interlaced conversion with scaling, flicker filtering, and
encoding into any of the NTSC or PAL video standards. The scaler and flicker filter are adaptive and
programmable for superior text display. Eight graphics resolutions are supported up to 1024 by 768 with full
vertical and horizontal under-scan capability in all modes. A high accuracy low jitter phase locked loop is
integrated to create outstanding video quality. Support is provided for MacrovisionTM. In addition to TV
encoder modes, bypass modes are included which allow the TV DAC’s to be used as a second CRT DAC .
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