TW8831

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TFT Display Controller

Product Status: Mass Production

OVERVIEW

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.

KEY 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

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
TW8831
Basic Information
Production Status
Mass Production
CVBS Input
Yes
S-Video Input
Yes
YPbPr Input
No
SCART Input
No
Analog RGB Input
No
Comb Filter
2D
Max Output Resolution
SVGA
Qualification Level
Automotive
De-Interlacer
2D
Color Enhancement
No
PIP
No
OSD Type
Font
OSD Font ROM
N/A
OSD Font RAM
256
External OSD
No
OSD Colors
16 Colors / 16-bit Pallette
TCON Output
Digital
Dual View Output
No
LVDS Input
No
LVDS Output
No
TTL Output
Yes
Memory Support
No
MCU
External
CCFL/LED Controller
LED
Touch-screen Controller
No
Temperature Range
-40 to +85

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