FN8447.2
September 25, 2014
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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LCD Video Processor with Built-in Decoder, LVDS and
TTL Inputs, BT.656 Output, and LVDS Panel Interface
TW8834
The TW8834 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, an LVDS and
TTL digital input interface, high quality scaler and
deinterlacer, a font OSD engine, and LVDS, TTL or TCON
output panel interfaces. The TW8834 can support input
resolutions up to 1080p and can drive LCD panels at
resolutions up to 1366 x 768. The TW8834’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
then 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 3CH differential or 6CH single ended CVBS input
Digital Inputs Support
Supports both BT.656 and 601 video formats with
H/VSYNC
Supports RGB 24-bit input up to 1080p resolution
Single channel LVDS (open LDI) input up to 720p
resolution
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 (1366 x 768) resolution, 85MHz
Supports serial (8-bit) RGB panel
Timing Controller (TCON)
Supports programmable interface signals for control
Column (source) driver/row (gate) driver
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
