GENERAL DESCRIPTION
The NT68520 is a high-quality image and highly integrated LCD controller, which combines triple video pre-amplifier, triple ADC, de-interlacing, YUV to RGB color space converter, scaling engine, gamma, OSD, and digital gain/offset, and supports analog RGB input, digital RGB input, and video CCIR656 8-bit input.

FEATURES
VGA Front End
♦ Built-in triple high-speed ADC, PLL, and pre-amplifier for analog RGB input
♦ Support both non-interlaced and interlaced RGB graphic input signals
♦ Internal generated programmable clamping pulse
♦ Gain control for input signal ranging from 0.5V~1.0V
♦ Support 32 steps of phase adjust
♦ ADC sampling rate up to 110 MHz for X type and135 MHz for E type
♦ VGA input resolution up to XGA 1024x768@75 for X type and SXGA 1280x1024@75Hz for E type

YUV Front End
♦ Support ITU-R BT.656 8-bit Input
♦ Built-in YUV to RGB color space converter

Video Processor
♦ Flexible de-interlacing unit for VGA and digital YUV video input data
♦ Independent Horizontal and Vertical zoom in/out algorithm
♦ Enhanced interpolation algorithm for optimal image quality
♦ RGB offset control for brightness adjust
♦ RGB gain control for contrast adjust
♦ 8-bit programmable gamma table for panel compensation
♦ Dithering function supports 24-bit quality for 18-bit panel
♦ Auto-calibration function for quick video centering, clock adjust, and phase adjust

Sync Processor
♦ Signal type accepts separate, composite and TTL-Level Sync-On-Green (SOG)
♦ Polarity detection for HSYNCI and VSYNCI
♦ Fast mode change detection function

Internal OSD Support
♦ 128 ROM fonts at the size of 12x18
♦ 64 programmable RAM fonts
♦ Internal SRAM allows up to 320 characters, with programmable OSD frame size
♦ Programmable shadow or border control for each character
♦ Programmable blinking effect for each character
♦ Support simultaneous display of up to 4 OSD windows
♦ Programmable shadow display for each window
♦ Each OSD row can be independently zoomed up to 4 times for horizontal and vertical axes
♦ Support transparent, translucent, and opaque effects
♦ 16 colors for foreground display and background display selected from internal color palette

Display Interface
♦ Display resolution up to 1024x768@75Hz for X type and 1280x768@75Hz for E type
♦ Support single pixel mode (18-bit) and dual pixel mode (24-bit)

MCU Interface
♦ Support serial 2-wire IIC bus

Power
♦ 3.3V power supply
♦ Less than 2.5 W