Key features
Analog video decoder
NTSC (male, 4.43) and PAL (b, d, g, h, i, m, n, N combination), PAL (60), SECAM automatic format detection
Three 10-bit ADCs and analog clamping circuitry
Fully programmable static gain or automatic gain control for Y or CVBS channels
The white peak is programmable for Y or CVBS channels
Software-selectable analog inputs
The high quality is the two input adaptive 2D comb filters of NTSC and PAL
PAL color phase error correction delay line
2D dynamic image enhancement peak shaving and CTI
Digital subcarrier phase-locked loops for accurate color decoding
Advanced synchronization of digital phase-locked loop levels and VCR replay and weak signal performance
Programmable hue, brightness, saturation, contrast and clarity
High-quality horizontal and vertical filtering at any scale, downscaled analog RGB input
Triple high speed 10-bit ADC with clamped and programmable gain amplifier.
Special one-time grant and H/V synchronization support YPbPr or RGB input
Built-in lock line PLL synchronous separator
Supports analog input resolution up to 1080i or WXGADIGITAL input support
Support BT.656 video format TFT panel support
Built-in programmable timing controller
Supports 168,000 colors with a built-in jitter engine of 3, 4, 6 or 8 bits per pixel
Digital panel with supported WVGA/SVGA resolution
Support serial (8-bit) RGB panel, screen display
6912 bytes of programmable font RAM and 256 display RAM
Four window fonts for OSDs border/shadow
1/2/3/4 bits/pixel
Supports variable width (12/16), height (2 to 32) image processing
High-quality scaling, up/down and non-linear scaling support
Panorama/glass water scaling
Built-in 2D deinterlacing function
Programmable hue, brightness, saturation, contrast and clarity
Input video and graphics for programmable planting
Independent RGB gain and offset controls
Panorama/glass water scaling
8-bit programmable gamma correction for each color
Operates in frame synchronization mode
Black/white elastic clock generation
Spread spectrum clock
Modulation frequency and diffusion width selectable sequencer (TCON)
Supports programmable timing control interface signals
MCU for column (source) driver/row (gate) driver
Based on industry standard 8052
Read from external SPI flash memory code
512B XDATA storage power management
Supports function-based independent power down
1.8/3.3 V operation miscellaneous
Supports 2-wire serial bus interface
Built-in 2-channel auxiliary ADC inputs
Single 27MHz crystal
80-pin LQFP package
description
The TW8830 incorporates many of the features needed to create a versatile video doorbell intercom LCD display system in a single package. It integrates a high-quality 2D comb NTSC/PAL/SECAM video decoder, triple high-speed RGB ADC, high-quality scaling, image enhancement features including black and white elastic and gamma correction. It also supports panoramic scaling converted to widescreen monitors. The TW8830 supports a wide range of input combinations: CVBS input, S-video, analog RGB and digital BT.656. At the output, it supports a variety of digital panel types with its built-in sequencer.TW6865