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TW8817
Low cost, highly integrated LCD controller for digital LCD panels
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Product
Description |
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The TW8817 is a highly integrated low cost TFT flat panel controller supporting digital panels. To reduce BOM cost, TW8817 integrates a
SECAM/NTSC/PAL video decoder supporting CVBS & S-Video inputs, an 8-bit MCU, a CCFL controller and a LED controller. The TW8817 integrates a
high quality NTSC/PAL/SECAM 2D video decoder and a 2D De-interlacer/Scaler.
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Target
Applications |
- Navigation + DVD + TV
- Back up Camera
- Rear Seat Entertainment
- Car TV
- Portable DVD
- PMP
- Portable TV
- Door Phone
- Photo Frame
- DMB TV
- Baby Monitor
- Home Audio
- In Flight Entertainment
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Key Features
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- Supports analog inputs including CVBS & S-Video signals
- Supports digital panel up to SVGA resolution
- Integrated 8-bit 8051 MCU, CCFL and LED controller
- Built-in 8 color font based OSD with ~200 ROM & 75 RAM fonts. Supports Multi-color fonts by
combining 3 single color fonts
- Embedded Image Enhancement
- Programmable CTI, hue, brightness, saturation, contrast & sharpness control
- Black/White Stretch
- Programmable favorite color enhancement- up to three colors (Skin, Grass & Sky)
- Programmable Gamma Correction table
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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 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 allows any of the
following combinations:
- 2 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, brightness, saturation, contrast,
sharpness, Gamma control, and noise suppression
- Automatic color control and color killer
- Detection of level of copy protection according to
- Macrovision standard |
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Font OSD |
- Built-in Font OSD with 202 ROM and programmable 227
RAM fonts. Supports Multi-color fonts by combining 3
single color fonts
- Multi-window OSD support with color pallet
- Support OSD overlay with alpha blending |
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TFT Panel Support |
- Supports a wide variety of Digital single pixel active matrix
TFT panels
- Supports digital TTL panel up to SVGA
- Supports 3, 4, and 6 bits per pixel format |
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Timing Controller (TCON) |
- Support programmable interface signals for control
- Column (source) driver / row (gate) driver |
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Image Processing & Enhancement |
- Built-in 2D de-interlacing engine
- Built-in high quality scalar
- Programmable hue, brightness, saturation, contrast
- Sharpness control with vertical peaking
- Programmable color transient improvement control
- Panorama / Water-glass scaling
- Programmable Gamma correction tables
- Black/White Stretch
- Programmable favorite color enhancement |
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CCFL Controller |
- Single channel CCFL controller based on push-pull
architecture
- Lamp fault monitoring- Lamp Open, Lamp Over-current,
Failure to Strike and Over-voltage
- Programmable Lamp Frequency to move EMI spurs out
of band
- Analog or digital brightness control. 300:1 vdimming
range with the digital brightness control
- Low power stand-by mode |
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Built-in Microcontroller |
- Support external SPI Interface
- Support I2C Master interface with GPIO
- Support 2 LED signal interface with GPIO
- Support UART interface with GPIO
- Support IR or interrupt with GPIO |
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LED Controller |
- Boost-up
- DC and PWM Dimming Control
- Built-in Open LED Protection
- 1MHz fixed Switching Frequency
- Resistor-programmable LED Current |
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Power Management |
- Supports Panel power sequencing
- Supports DPMS for monitor power management
- 1.8 / 3.3 V operation |
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Miscellaneous |
- Supports 2-wire serial bus interface
- Temperature rating: -40 C to +85 C
- Spread spectrum PLL
- Low-speed ADC for KEY scan
- Programmable panel VCOM offset control
- 5V tolerant I/O
- Power-down mode
- Single 27MHz crystal |
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Block Diagram
(click on image for larger
view) |
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