TW8809

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Low Cost Video Format Converter

OVERVIEW

The TW8809 is a low cost video format converter that can take either analog CVBS or 24-bit digital RGB format video and output these signals in ITU-R.656 format. The video sources can be scaled and deinterlaced, so that the ITU-R BT.656 output is already formatted to the desired resolution and in progressive format. In addition, the TW8809 has built-in OSD and image enhancement capabilities.

KEY FEATURES

    $Analog Video Decoder
  • NTSC (M, 4.43) and PAL (B, D, G, H, I, M, N, N combination), PAL (60), SECAM with automatic format detection
  • Selectable differential or single-ended CVBS input
  • Supports two differential or 4 single-ended CVBS inputs
  • 10-bit ADC 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
  • 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 subcarrier 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

    Digital Input
  • Supports YCbCr/RGB 24-bit input
  • Supports both BT.656 and BT.601 video formats
  • Supports input resolutions up to 720p

    Digital Output
  • ITU-R BT.656 compatible YCbCr (4:2:2) output format
  • Progressive ITU-R BT.656 output format for both interlaced and progressive inputs
  • Output resolution up to SVGA (pseudo BT.656)

    On Screen Display
  • 256 font RAM and 512 display RAM
  • Four windows font OSD with bordering/shadowing
  • 1/2/3/4 bits/pixel
  • Supports variable width (12/16), height (2~32)

    Image Processing
  • High quality scaler with both up/down and nonlinear scaling support
  • Panorama/water-glass scaling
  • Built-in 2D deinterlacing function
  • Programmable hue, brightness, saturation, contrast and sharpness
  • Programmable cropping of input video and graphics
  • Independent RGB gain and offset controls
  • Programmable 8-bit Gamma correction for each color
  • Operates in frame sync mode
  • Black/white stretch

    Clock Generation
  • Spread spectrum clock
  • Selectable modulation frequency and spread width

    Power Management
  • Supports functional based independent power-down
  • 1.8/3.3V operation

    Miscellaneous
  • Short-to-battery detection test
  • Short-to-ground detection test
  • Supports 2-wire serial bus interface
  • Single 27MHz crystal
  • 56 lead QFN (with wettable flanks)
  • TW8809AT-NA2-GR is AEC-Q100 qualified

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
TW8809
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
PIP
No
OSD Type
Font
OSD Font RAM
256
External OSD
No
OSD Colors
16 Colors / 16-bit Pallette
TCON Output
No
Dual View Output
No
LVDS Input
No
LVDS Output
No
TTL Output
No
Memory Support
No
MCU
External
CCFL/LED Controller
No
Touch-screen Controller
No
Temperature Range
-40 to +105

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