TW8836

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LCD Video Processor with Decoder, Triple ADCs, LVDS and TTL Input, MCU, OSD, TCON and LVDS Interface

OVERVIEW

The TW8836 is a highly integrated LCD video processor that incorporates many of the features required to create a multipurpose LCD display system into a single package. This includes a high quality, 2D comb NTSC/PAL/SECAM video decoder, triple high-speed RGB ADCs, an LVDS and TTL digital input interface, high-quality scaler and deinterlacer, as well as a versatile OSD, high-performance MCU and LVDS or TTL output panel interface. The TW8836 can support input resolutions up to 1080p and can drive LCD panels at resolutions up to 1366x768. The TW8836’s video processing capability includes arbitrary H/V scaling, panoramic scaling, image mirroring, image adjustment and enhancement, black and white stretch, etc. The feature set and versatility of this device makes it an ideal solution for in-car LCD display applications, as well as portable display applications such as pico projectors.

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
  • 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 allow composite, S-video, analog YPbPr, or RGB
  • High quality adaptive 2D comb filter for NTSC/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 2CH differential or 4CH single ended CVBS input
  • Supports detection of Macrovision copy protection

    Analog RGB Inputs
  • Triple high speed 10-bit ADCs with clamping and programmable gain amplifier
  • SOG and H/VSYNC support for YPbPr or RGB input
  • Built-in line locked PLL with sync separator
  • Supports input resolution up to 1080p

    Digital Inputs Support
  • Supports both BT.656 and 601 video formats
  • Supports YCbCr/RGB 24-bit input (bidirectional) up to 1080p resolution
  • Single channel LVDS input up to 720p resolution
  • Supports RGB 565 + BT.656 at the same time

    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 (1366x768) resolution, 85MHz
  • Supports serial (8-bit) RGB panel

    Font Based On-Screen Display
  • Eight window font OSD with bordering/shadow
  • 10kB programmable font RAM and 512 display RAM
  • 1/2/3/4 bits/pixels
  • Supports variable width (12/16), height (2~32)

    SPI Flash Based On-Screen Display
  • 9 bitmap based OSD windows in 2 layers through SPI with alpha blending between layers
  • Supports 4/6/8 bits/pixels
  • Supports RLE decompression for two windows

    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

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

    MCU
  • Industry standard 8052 based
  • Code fetch from external SPI flash memory
  • 256B code cache
  • 2k XDATA memory
  • Supports power save mode with 32k internal clock
  • ISP (In System Programming) through I2C
  • Supports 24-bit addressing

    Miscellaneous
  • Supports Fast mode I2C interface up to 400kHz
  • Short diagnostics
  • Short-to-battery
  • Short-to-ground
  • Up to 4 PWMs
  • GPIOs
  • 1.8V/3.3V internal operation
  • 1.8V I/O support
  • Power-down mode
  • Single 27MHz crystal
  • 128 Ld LQFP with exposed thermal pad and 172 ball TFBGA package
  • TW8836AT-LB2-GE is AEC-Q100 qualified

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
TW8836
Production Status
Mass Production
CVBS Input
Yes
S-Video Input
Yes
YPbPr Input
Yes
SCART Input
No
Analog RGB Input
Yes
Digital RGB/Y CbCr Input
24 bit
ADC Input Frequency (MHz)
148
Comb Filter
2D
Max Output Resolution
WXGA
Qualification Level
Standard
De-Interlacer
2D
Color Enhancement
Yes
PIP
No
OSD Type
Font / SPI bitmap
OSD Font ROM
N/A
OSD Font RAM
379
External OSD
No
OSD Colors
16 Colors / 16-bit Pallette
TCON Output
Digital
Dual View Output
No
LVDS Input
Yes
LVDS Output
Yes
TTL Output
Yes
Memory Support
No
MCU
Integrated
CCFL/LED Controller
No
Touch-screen Controller
Yes
Temperature Range
-40 to +105

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