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LCD Video Processor with Built-in Decoder, TTL Inputs,
BT.656 Output, and LVDS Panel Interface
TW8824
The TW8824 is a highly integrated LCD video processor that
incorporates many of the key features required to create a
multi-purpose LCD display system into a single package. This
includes a high quality 2D comb NTSC/PAL/SECAM video
decoder, which supports both single-ended and differential
CVBS signals, a digital RGB input interface, high quality scaler
and deinterlacer, a Font OSD engine, and LVDS, TTL or TCON
output panel interfaces. The TW8824 can support input
resolutions up to 1080p and can drive LCD panels at
resolutions up to 1366x768. The TW8824’s video processing
capability includes arbitrary H/V scaling, panoramic scaling,
image mirroring, image adjustment and enhancement, black
and white stretch, etc. This device can support fast boot
system requirements and provides stability and reliability to
the system due to the fact that it is a hardwired solution that
can sync to the video source and display an image on the LCD
in less than 0.5 seconds from start-up. The feature set and
versatility of this device makes it an ideal solution for in-car
LCD display applications.
Applications
• Automotive display systems
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
CVBS channel
• Programmable white peak control for the 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/CTI
• Digital subcarrier PLL for accurate color decoding
• Programmable hue, brightness, saturation, contrast,
sharpness
• Selectable differential or single-ended CVBS input
• Digital horizontal PLL and advanced synchronization
processing for VCR playback and weak signal performance
• High quality horizontal and vertical filtered down scaling
with arbitrary scale down ratio
• Up to 3-CH differential or 6-CH single-ended CVBS input
Digital Inputs Support
• Supports RGB 24-bit input up to 1080p resolution at either
1.8V or 3.3V logic level
• Supports both BT.656 and 601 video formats with H/VSYNC
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 (TTL) or single channel LVDS panels
up to WXGA (1366x768) resolution, 85MHz
• Supports serial (8-bit) RGB panel
Timing Controller (TCON)
• Supports programmable interface signals for control
• Column (source) driver/row (gate) driver
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
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August 6, 2014
FN8667.0
TW8824
2FN8667.0
August 6, 2014
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BT.656 Output
• Independent ITU-R 656 compatible YCbCr(4:2:2) output format
• ITU-R 656 output generated from decoder, LVDS, DRGB and
post scaling path
• Max 148.5MHz with 3.3V, 74MHz with 1.8V
Font Based On Screen Display
• Four window font OSD with bordering/shadow
• 6912B programmable font RAM and 512 display RAM
• 1/2/3/4 bits/pixel
• Supports variable width (12/16), height (2~32)
Image Processing
• High quality scaler with both up/down and
panorama/water-glass scaling support
• Built-in 2D de-interlacing function
• Programmable brightness, contrast, saturation, hue and
sharpness
• Programmable color transient improvement control
• Supports programmable cropping of input video and graphics
• Independent RGB gain and offset controls
•DTV hue adjustment
• Programmable 8-bit Gamma correction for each color
• Black/White Stretch
Clock Generation
• Spread spectrum profile based on triangular modulation with
center spread
• Programmable modulation frequency and spread width
Miscellaneous
• Supports Fast Mode I2C interface up to 400Kbps
• Short Diagnostics:
-Short-to-battery
-Short-to-ground
•Up to 3 PWM outputs
•GPIOs
• 1.8V internal operation
• 1.8V/3.3V DTV input support
• 1.8V/3.3V BT.656 output support
• Hardware mute pin
•Single 27MHz crystal
• 100 pin TQFP
Functional Block Diagram
