CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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LCD Controller
TW8820
Description
The TW8820 incorporates many of the features required
to create a multi-purpose Video Door phone intercom
LCD display system in a single package. It integrates a
high quality 2D comb NTSC/PAL/SECAM video decoder,
high quality scaler, and image enhancement functions
which include Black and White Stretch and Gamma
Correction. It also supports panoramic scaling for
conversion to wide screen display. TW8820 supports
analog composite video input and the output supports a
wide variety of digital LCD panel types with its built-in
timing controller.
Features
ANALOG VIDEO DECODER
NTSC (M, 4.43) and PAL (B, D, G, H, I, M, N, N
combination), PAL (60), SECAM with automatic format
detection
10-bit ADC and analog clamping circuit
Fully programmable static gain or automatic gain
control for the Y or CVBS channel
Programmable white peak control for the Y or CVBS
channel
High quality adaptive 2D comb filter for both NTSC and
PAL inputs
PAL delay line for color phase error correction
Image enhancement with 2D dynamic peaking and CTI
Digital sub-carrier PLL for accurate color decoding
Digital horizontal PLL and advanced synchronization
processing for VCR playback and weak signal
performance
Programmable hue, brightness, saturation, contrast
and sharpness
TFT PANEL SUPPORT
Built-in programmable timing controller
Supports 3, 4, 6 or 8 bits per pixel up to 16.8 million
colors with built-in dithering engine
Supports digital panels up to WVGA/SVGA resolution
Supports Serial (8-bit) RGB panels
TIMING CONTROLLER (TCON)
Supports programmable timing interface signals for
control
Column (source) driver/row (gate) driver
ON SCREEN DISPLAY
6912 byte programmable font RAM and 256 display
RAM
Four windows font OSD with bordering/shadowing
1/2/3/4 bits/pixel
Supports variable width (12/16), height (2~32)
IMAGE PROCESSING
High quality scaler with both up/down and nonlinear
scaling support
Panorama/Water-glass scaling
Built-in 2D de-interlacing function
Programmable hue, brightness, saturation, contrast
and sharpness
Programmable cropping of input video and graphics
Independent RGB gain and offset controls
Programmable 8-bit Gamma correction for each color
Operates in Frame Sync mode
Black/White Stretch
CLOCK GENERATION
Spread spectrum clock
Selectable Modulation frequency and spread width
MCU
Industry standard 8052 based
Code fetch from external SPI flash memory
512 byte XDATA memory
POWER MANAGEMENT
Supports functional based independent
Power-down
1.8/3.3V operation
