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PDF TW8817 Data sheet ( Hoja de datos )
| Número de pieza | TW8817 | |
| Descripción | Digital LCD Panel Processor | |
| Fabricantes | TECHWELL | |
| Logotipo |  |
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TW8817 - DigitalLCDPanelProcessor withbuilt-in
MCU,NTSC/PAL/SECAMDecoderandTCON
Techwell Confidential. Information may change
without notice
Disclaimer
This d ocument pro vides t echnical information for the user. Techwell Inc. rese rves the ri ght to modif y the
information in this document as necessary. The customer should make sure that they have the most recent data
sheet version. Techwell Inc. holds no responsibility for any errors that may appear in this document. Customers
should take appropriate action to ensure their use of the products does not infringe upon any patents. Techwell
Inc. respects valid patent rights of third parties and does not infringe upon or assist others to infringe upon such
rights.
TECHWELL, INC.
1R
EV. A
02/05/2008
http://www.Datasheet4U.com
1 page  
TW8817
Digital LCD Panel Processor with Video Decoder, MCU and TCON
Introduction
NTSC / PAL / SECAM
Tuner
Techwell
TW8817
Audio
Amp
Applications
- Mobi l LCD TVs
- Rear seat entertainment
- Portable DVD, PMP and HMD (Head Mount
Display)
Features
The TW8817 is a l ow co st high quality TFT pan el
controller w ith embedd ed NTSC/PAL/SECAM TV
decoder. It incorporates all the featuresrequired to create
multi-purpose low cost LCD TV systems in a si ngle
package. It contain s a ll the ci rcuits req uired to adapt
standard NTSC/PAL/SECAM analog TV input signals for
display o n va rious TFT LCD panel types. An integrated
timing controller allows d irect in terface with d igital LCD
panels. Its versatile analog in puts allow CVBS, S -video,
signal to be connectedsimultaneously.
Other features include: high quality a daptive 4 H Comb
Filter, downscaling to QVGA output resolution, interlaced
and progressive ITU 656 input support, 2D de-interlacer
and panaromic scal er, and multi -window programmalbe
OSD. It also includes image enhancement functions such
as black and white stretch, 2D peaking, CTI, and favorite
color enhancement to further impr ove p icture q uality. it
also i ncludes cost sa ving fea ture l ike CCFL controller,
charge pu mp booster and progra mmable p anel offset
control. In ad dition, TW8817 h as bui lt-in microcontroller
with external SPI interface.
Analog Video Decoder
NTSC (M, 4.34) and PAL (B, D, G, H, I, M, N, N combination),
PAL (60), SECAM with automatic format detection
− Advanced synchronization processing for VCR trick play signal
− Two 10-bit ADCs and analog clamping circuit.
− Built-in analog anti-aliasing filter
− Fully programmable static g ain o r automatic g ain c ontrol f or
the Y or CVBS channel
− Programmabel white peakcontrol for theY or CVBS channel
− Software selectable analog inputs allows any of the following
combinations:
3 composite video
1 S-Video
− 4-H adaptive comb filter Y/C separation
− PAL delay line for color phase error correction
− Digital PLL for both color and horizontal locking
− Programmable hue , br ightness, s aturation, contrast,
sharpness, Gamma control, and noise suppression
− Automatic color control and color killer
− Detection of level of copy protection according to Macrovision
standard
Built-in Microcontrolelr
− Support external SPI Interface
− Support I2C Master interface with GPIO
− Support Up to 4 MCUGPIO
− Support UART interface with GPIO
− Support IR or interrupt with GPIO
TFT Panel Support
− Supports a wide variety of Digital single pixel active matrix TFT
panels
− Supports 3, 4, 6 bits per pixel format
On Screen Display
− Built-in OSD c ontroller w ith integrated c haracter ROM and
programmable RAM font.
− Multi-window OSD support with color pallet
− Support OSD overlay with alpha blenindg
TECHWELL, INC.
5 REV.
A
02/05/2008
5 Page 
TW8817
Digital LCD Panel Processor with Video Decoder, MCU and TCON
Automatic standard detection
The TW8817 has build-in automatic standard discrimination circuitry. The circuit uses burst-phase, burst-
frequency a nd f rame ra te to id entify NT SC, PAL or SE CAM color sig nals. The standards that can be
identified are NTSC (M), NTSC (4.43), PAL (B, D, G, H, I), PAL (M), PAL (N), PAL (60) and SECAM (M).
Each standard can be included or excluded in the standard recognition process by software control. The
identified stand ard is in dicated b y t he S tandard Selection ( SDT) re gister. A utomatic st andard det ection
can be overridden by software controlled standard selection.
TW8817 supp orts a ll common video formats as shown in T able 1 . T he vide o decoder n eeds t o be
programmed appropriately for each of the composite video input formats.
Table 1. Video Input Formats Supported by the TW8817
Format
NTSC-M
NTSC-Japan (1)
PAL-B, G
PAL-D
PAL-H
PAL-I
PAL-M
PAL-CN
SECAM
Lines
525
525
625
625
625
625
525
625
625
Fields
60
60
50
50
50
50
60
50
50
PAL-60
NTSC (4.43)
525 60
525 60
Fsc
3.58 MHz
3.58 MHz
4.43 MHz
4.43 MHz
4.43 MHz
4.43 MHz
3.58 MHz
3.58 MHz
4.406MHz
4.250MHz
4.43 MHz
4.43 MHz
Country
U.S., many others
Japan
Many
China
Belgium
Great Britain, others
Brazil
Argentina
France, Eastern Europe,
Middle East, Russia
China
Transcoding
Notes: (1). NTSC-Japan has 0 IRE setup.
Component Processing
The TW8817 adjusts brightness by adding a programmable value (in register BRIGHTNESS) to the Y
signal. It adjusts the picture contrast by changing the gain (in register CONTRAST) of the Y signal.
The TW8817 also provides a sharpness control function through control registers. It providesthe control in
16 steps up to +12db. The center frequency of the enhancement curve is selectable by software control. It
also provides a high frequency coring function to minimize the amplification of high frequency noise. To
further enhance the imag e, a p rogrammable ver tical peaking function is pro vided fo r up to +6db o f
enhancement.
The TW8817 provides the Color Transient Improvement function to further enhance the image quality.
The CTI enhance the color edge transient without any hue distortion.
The color saturation can be adjusted by changing the gain of Cb and Cr signals for all NTSC, PAL and
SECAM formats. The Cb and Cr gain can be adjusted independently for flexibility.
TECHWELL, INC.
11 R
EV. A
02/05/2008
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TW8817.PDF ] | |
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