MiTAC 7521 PLUS/N service manual 16 CH7005C Digital PC to TV Encoder, CH7005 Features

7521Plus / N N/B MAINTENANCE

1.2.16 CH7005C Digital PC to TV Encoder

The Chrontel’s CH7005 digital PC to TV encoder is a standalone integrated circuit which provides a PC 99 compliant solution for TV output. It provides a universal digital input port to accept a pixel data stream from a compatible VGA controller (or equivalent) and converts this directly into NTSC or PAL TV format.

This circuit integrates a digital NTSC/PAL encoder with 9-bit DAC interface, and new adaptive flicker filter, and high accuracy low-jitter phase locked loop to create outstanding quality video. Through its TrueScale TM scaling and deflickering engine, the CH7005 supports full vertical and horizontal underscan capability and operates in 5 different resolutions including 640x480 and 800x600.

A new universal digital interface along with full programmability make the CH7005 ideal for system-level PC solutions. All features are software programmable through a standard I 2 C port, to enable a complete PC solution using a TV as the primary display.

CH7005 Features
Supports MacrovisionTM 7.X anti-copy protection
Function compatible with CH7004
Universal digital interface accepts YCrCb (CCIR601or 656) or RGB (15,16 or 24-bit) video data in both non-interlaced
and interlaced formats
TrueScaleTM rendering engine supports undescam operations for various graphic resolutions
Enhanced text sharpness and adaptive flicker removal with up to 5-lines of filtering
Enhanced dot crawl control and area reduction
Fully programmable through I2C port
Supports NTSC, NTSC-EIA (Japan), and PAL (B, D, G, H, I, M and N) TV formats
Provides Composite, S-Video and SCART outputs
Auto-detection of TV presence
Supports VBI pass-through
Programmable power management
9-bit video DAC outputs
Complete Windows and DOS driver software
Offered in 44-pin PLCC, 44-pin TQFP	36