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PDF TW8836 Data sheet ( Hoja de datos )
| Número de pieza | TW8836 | |
| Descripción | LCD Video Processor | |
| Fabricantes | Intersil | |
| Logotipo |  |
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Techwell
LCD Video Processor with Built-in Decoder, Triple
ADCs, LVDS & TTL Inputs, MCU, OSD, TCON and LVDS
panel interface
TW8836
The TW8836 is a highly integrated LCD video processor
that incorporates many of the 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, triple high speed RGB
ADCs, an LVDS and TTL digital input interface, high
quality scaler and de-interlacer, as well as a versitile
OSD, high performance MCU, and LVDS or TTL output
panel interface. The TW8836 can support input
resolutions up to 1080p and can drive LCD panels at
resolutions up 1366 x 768. The TW8836’s video
processing capability includes arbitrary H/V scaling,
panoramic scaling, image mirroring, image adjustment
and enhancement, black and white stretch, etc. The
feature set and versatility of this device makes it an
ideal solution for in-car LCD display applications, as well
as portable display applications such as Pico Projectors.
Applications
x In-car display
x Pico Projector & Portable media player
x Portable DVD and DVR players
Analog Video Decoder
x NTSC (M, 4.43) and PAL (B, D, G, H, I, M, N, N
combination), PAL (60), SECAM with automatic format
detection
x Three 10-bit ADCs and analog clamping circuit.
x Fully programmable static gain or automatic gain
control for the Y or CVBS channel
x Programmable white peak control for the Y or CVBS
channel
x Software selectable analog inputs allows composite,
S-video, analog YPbPr or RGB
x High quality adaptive 2D comb filter for both NTSC
and PAL inputs
x PAL delay line for color phase error correction
x Image enhancement with 2D dynamic peaking / CTI.
x Digital sub-carrier PLL for accurate color decoding
x Programmable hue, brightness, saturation, contrast,
sharpness
x Selectable differential or single-ended CVBS input
x Digital horizontal PLL and Advanced synchronization
processing for VCR playback and weak signal
performance
x High quality horizontal and vertical filtered down
scaling with arbitrary scale down ratio
x Up to 2CH differential or 4CH single ended CVBS input
Analog RGB Inputs
x Triple high speed 10-bit ADCs with clamping and
programmable gain amplifier
x SOG and H/V sync support for YPbPr or RGB input
x Built-in line locked PLL with sync separator
x Supports input resolution up to 1080p
Digital Inputs Support
x Supports both BT656 and 601 video formats
x Supports YCbCr/RGB 24-bit input (bi-directional) up to
1080p resolution
x Single channel LVDS input up to 720p resolution
x Supports RGB 565 + BT 656 at the same time
TFT Panel Support
x Built-in programmable timing controller
x Supports 3, 4, 6 or 8 bits per pixel up to 16.8 million
colors with built-in dithering engine
x Supports digital panels (TTL) or single channel LVDS
panels up to WXGA (1366 x 768) resolution, 85MHz
x Supports Serial (8-bit) RGB panel
Font Based On Screen Display
x Eight window font OSD with bordering / shadow
x 10KB programmable font RAM and 512 display RAM
x 1/2/3/4 bits/pixel
x Supports variable width (12/16), height (2~32)
SPI Flash Based On Screen Display
x 9 bitmap based OSD windows in 2 layers through SPI
with alpha blending between layers
x Supports 4/6/8 bits/pixel
x Supports RLE decompression for two windows
FNXXXX
May 17, 2012
1
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2012. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
1 page  
TW8836
TW8836 Functional Block Diagram
Functional Description
Overview
Intersil|Techwell’s TW8836 LCD Video processor is a highly integrated TFT panel controller. It integrates a high quality
2D comb NTSC/PAL/SECAM video decoder, scalers and de-interlacer, timing controller, flexible OSD (font based and SPI
bit-map based OSD engine), and a high performance MCU. This unique level of mixed signal integration turns a TFT panel
into a flexible display system. TW8836 incorporates easy-to-operate features in a single package for multi-purpose in-car
LCD display, portable DVD and DVRs, media players, and pico projectors. It contains all the logic required to convert
analog or digital video signals in various formats to the signal formats that are necessary to drive various kinds of TFT
panels. It supports different panel resolutions depending on the scaler and panel clock settings, and has a built-in TCON
for direct connecting with low cost TCON-less panel.
The integrated analog front-end contains ADCs with clamping circuits and Automatic Gain Control (AGC)
circuits as well as anti-aliasing filters to minimize the external component count. The built-in video decoder employs
proprietary 2D Comb filter Y/C separation technologies to produce exceptionally high quality pictures.
The chip's internal logic synchronizes the panel frame rate to the incoming input frame rate. A high quality image-scaling
engine is used to convert the different input resolution formats to the output panel resolution. An internal de-interlacing
engine also allows interlaced video to be displayed.
In addition, TW8836 has an array of integrated value-added features and input/output flexibility that makes it an
extremely versitile single chip solution. On Screen Display (OSD) is supported through an on-chip multi-window OSD
engine for maximum flexibility. Integraged 12-bit ADCs for 4-wire resistive touch screen control, single channel LVDS
(Open LDI) input and output, as well as an on-chip MCU are just a few of these features. The host control interface
supports a standard 2-wire serial bus
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TW8836
Input Image Control
The input cropping control provides a way for programming the active display window region for the selected input video
or graphic. In normal operation, the first active line starts with the VSYNC signal. This and the vertical active length
register setting are used to determine the active vertical window. The active pixel starts HSYNC. This and the horizontal
active width register are used to determine the active horizontal window. The vertical window is programmed in line
increments. The horizontal window is programmed in single pixel increments for single pixel input mode or two pixel
increments for double pixel input mode. If the data qualifier is used, then only qualified pixels will be counted in the
window size.
Image Scaling
The internal high quality image-scaling engine operates in several modes. The first is the bypass mode. No image scaling
is done in this mode. The number of active output lines per frame and the number of active output pixels per line are
identical to the input active lines and pixels, respectively. This mode is best used for displaying computer graphics at the
panel's native resolution.
By default, the input active window is zoomed up to the full screen for display. This is used for non-interlaced data like PC
graphics or progressive scan video. The vertical and horizontal magnification ratio can be adjusted independently.
TW8836 has an option called frame-sync mode which does not use a frame buffer. In this mode, the zoom ratio and
output clock rate should be coordinated appropriately to avoid internal buffer overrun.
The TW8836 has a built-in 2D de-interlacing engine to process interlaced video inputs. When used, every input field is
zoomed to the full output frame resolution. The de-interlaced fields can also be properly adjusted to have fields aligned
correctly to avoid any artifacts. The offset can be programmed to provide maximum flexibility.
The horizontal scaler can be programmed to perform non-linear scaling : panorama scaling for displaying 4:3 input on a
16:9 display and water-glass scaling for displaying 16:9 input on a 4:3 display.
Image Enhancement Processing
BLACK/WHITE STRETCH
This feature is to expand the dynamic range of the input image, which creates a more vivid image impression.
TFT Panel Support
TW8836 supports a variety of active matrix TFT panel types and resolutions up to 1366x768 including panels with a TTL
or single channel LVDS interface.
DITHERING
TW8836 has a dithering circuit to reduce the output dynamic range to fit the panel type. This allows LCD panels with 3, 4,
6 or 8 bits per color per pixel to display up to 16.8 million colors and LCD panels with 3 bits per color per pixel can display
up to 2.1 million colors. Both spatial and frame modulation dithering are available. When dithering with the least
significant 4-bits of input data it uses spatial modulation with 4x4 blocks of pixels. When dithering with the least
significant 1 to 3 bits of input data, it uses either spatial modulation with 2x2 pixel blocks, or frame modulation.
GAMMA TABLE
TW8836 has an integrated gamma table for each color output and is fully programmable through the host bus.
TCON
The integrated Timing controller supports flexible column/row driver control signals to interface with TCON-less panel
directly.
LVDS OUT PUT FORMAT
TW8836 is able to control the output order for panel control signals VS, HS and DE by register settings.
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11 Page | ||
| Páginas | Total 46 Páginas | |
| PDF Descargar | [ Datasheet TW8836.PDF ] | |
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