TW8834

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LCD Video Processor with Decoder, LVDS and TTL Inputs, BT.656 Output, and LVDS Panel Interface

Product Status: Mass Production

OVERVIEW

The TW8834 is a highly integrated LCD video processor that incorporates many of the key features required to create a multi-purpose LCD display system into a single package. This includes a high quality 2D comb NTSC/PAL/SECAM video decoder which supports both single-ended and differential CVBS signals, an LVDS and TTL digital input interface, high quality scaler and deinterlacer, a Font OSD engine, and LVDS, TTL or TCON output panel interfaces. The TW8834 can support input resolutions up to 1080p and can drive LCD panels at resolutions up to 1366 x 768. The TW8834’s video processing capability includes arbitrary H/V scaling, panoramic scaling, image mirroring, image adjustment and enhancement, black and white stretch, etc. This device can support fast boot system requirements and provides stability and reliability to the system due to the fact that it is a hardwired solution that can sync to the video source and display an image on the LCD in less then 0.5 seconds from start up. The feature set and versatility of this device makes it an ideal solution for in-car LCD display applications.

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
  • 10-bit ADC and analog clamping circuit
  • Fully programmable static gain or automatic gain control for CVBS channel
  • Programmable white peak control for the 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/CTI
  • Digital subcarrier PLL for accurate color decoding
  • Programmable hue, brightness, saturation, contrast, sharpness
  • Selectable differential or single-ended CVBS input
  • Digital horizontal PLL and advanced synchronization processing for VCR playback and weak signal performance
  • High quality horizontal and vertical filtered down scaling with arbitrary scale down ratio
  • Up to 3CH differential or 6CH single ended CVBS input

    Digital Inputs Support
  • Supports both BT.656 and 601 video formats with H/VSYNC
  • Supports RGB 24-bit input up to 1080p resolution
  • Single channel LVDS (open LDI) input up to 720p resolution

    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
  • Supports digital panels (TTL) or single channel LVDS panels up to WXGA (1366 x 768) resolution, 85MHz
  • Supports serial (8-bit) RGB panel

    Timing Controller (TCON)
  • Supports programmable interface signals for control
  • Column (source) driver/row (gate) driver

    BT.656 Output
  • Independent ITU-R 656 compatible YCbCr(4:2:2) output format
  • ITU-R 656 output generated from decoder, LVDS, DRGB and post scaling path
  • Max 148.5MHz with 3.3V, 74MHz with 1.8V

    Font Based On Screen Display
  • Four window font OSD with bordering/shadow
  • 6912B programmable font RAM and 512 display RAM
  • 1/2/3/4 bits/pixel
  • Supports variable width (12/16), height (2~32)

    Image Processing
  • High quality scaler with both up/down and panorama/water-glass scaling support
  • Built-in 2D deinterlacing function
  • Programmable brightness, contrast, saturation, hue and sharpness
  • Programmable color transient improvement control
  • Supports programmable cropping of input video and graphics
  • Independent RGB gain and offset controls
  • DTV hue adjustment
  • Programmable 8-bit Gamma correction for each color
  • Black/white stretch

    Clock Generation
  • Spread spectrum profile based on triangular modulation with center spread
  • Programmable modulation frequency and spread width

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
TW8834
Basic Information
生产状态
Mass Production
CVBS输入
Yes (differential)
S-视频输入
No
YPbPr输入
No
SCART输入
No
模拟RGB输入
No
数字RGB/Y CbCr输入
24 bit
模数转换器输入频率 (MHz)
27
梳状滤波器
2D
最大输出分辨率
WXGA
资质级别
Automotive
去隔行
2D
颜色增强
Yes
PIP
No
OSD类型
Font
OSD字体ROM
N/A
OSD字体RAM
256
外部OSD
No
OSD颜色
16 Colors / 16-bit Pallette
TCON输出
Digital
双视图输出
No
LVDS输入
Yes
LVDS输出
Yes
TTL输出
Yes
内存支持
No
MCU
External
CCFL/LED 控制器
No
触摸屏控制器
No
温度范围
-40 to +105

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