Overview
Description
The TW8831 incorporates many of the features required to create multi-purpose in-car LCD display system in a single package. It integrates a high quality 2D comb NTSC/PAL/SECAM video decoder, triple High-Speed RGB ADCs, high quality scaler, and images enhancement functions which include Black and White Stretch and etc. It also supports panoramic scaling for conversion to wide screen display. On the input side, it supports a rich combination of CVBS, S-video. On the output side, it supports variety of digital panel types with its built-in timing controller.
Features
- 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
- Three 10-bit ADCs 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
- Software selectable analog inputs
- 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
- High quality horizontal and vertical filtered down scaling with arbitrary scale down ratio
- 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
- Support digital panel up to WVGA/SVGA resolution
- Support Serial (8bit) RGB panel
- On Screen Display
- 256 programmable font RAM and 384 display RAM.
- Four windows font OSD with bordering/shadow
- Image Processing
- High quality scaler with both up/down and nonlinear scaling support
- Built-in 2D de-interlacing function
- Programmable hue, brightness, saturation, contrast and sharpness
- Supports programmable cropping of input video and graphics
- Independent RGB gain and offset controls
- Panorama / Water-glass scaling
- Programmable 10-bit Gamma correction for each color
- Operated in Frame Sync mode
- Black/White Stretch
- Clock Generation
- Spread spectrum clock
- Modulation frequency and spread width are selectable
- Power Management
- Supports functional based independent power down
- 1.8/3.3V operation
- Miscellaneous
- Supports 2-wire serial bus interface
- Built-in single LED back light controller
- Built-in VCOM DC voltage
- Built-in VCOM analog amplitude
- Built-in DC-DC convertor
- Single 27MHz crystal
- 80-pin LQFP package
Comparison
Applications
- In-car display controller
- Portable DVD and DVRs players
- Portable media player
Documentation
Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 1.96 MB | |
| Datasheet - Short-form | PDF 127 KB | |
| Product Advisory | PDF 363 KB | |
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Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Processing table
TW8831-LB1-CR Active Samples Available
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LQFP | Tray | 3 | 3.845 | Get Samples, |
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