TW8827

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Ultra low cost, highly integrated LCD controller for analog LCD panels

OVERVIEW

The TW8827 is an ultra low cost, highly integrated LCD TFT flat panel controller supporting analog panels. To reduce BOM cost, TW8827 integrates a NTSC/PAL/SECAM video decoder supporting CBVS & S-Video inputs, an 8-bit MCU, a CCFL controller and a LED controller. The TW8827 integrates a high quality NTSC/PAL/SECAM 2D video decoder and a 2D De-interlacer/Scaler. In addition, 16-bit digital RGB/YCbCr inputs are supported through built-in digital interface.

KEY FEATURES

  • Supports analog inputs including CVBS & S-Video signals and digital inputs including 18-bits RGB/YCbCr. Both interlaced and progressive ITU-656 and
    ITU-601 formats are supported
  • Supports analog panel up to WQVGA resolutions
  • Integrated 8-bit 8051 MCU, LED controller and CCFL controller Built-in 8 color font based OSD with ~200 ROM & 75 RAM 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

  • 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

  • 16bits Digital RGB/YCbCr Inputs
  • Supports 18-bits RGB/YCbCr digital input
  • Supports both interlaced and progressive ITU 656 source

  • TFT Panel Support
  • Supports a wide variety of Analog active matrix TFT panels
  • Supports analog panel up to WQVGA (480 x 234)

  • Font OSD
  • Built-in OSD controller with integrated character ROM and programmable RAM font- 202 ROM & 75 RAM fonts
  • Multi-window OSD support with color pallet
  • Support OSD overlay with alpha blending

  • 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

  • LED Controller
  • Boost-up DC and PWM Dimming Control
  • Built-in Open LED Protection
  • 1MHz fixed Switching Frequency
  • Resistor-programmable LED Current

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
TW8827
Production Status
Mass Production
CVBS Input
Yes
S-Video Input
Yes
YPbPr Input
No
SCART Input
No
Analog RGB Input
No
Digital RGB/Y CbCr Input
16 bit
Comb Filter
2D
Max Output Resolution
WQVGA
Qualification Level
Automotive
De-Interlacer
2D
Color Enhancement
Yes
PIP
No
OSD Type
Font
OSD Font ROM
202
OSD Font RAM
75
External OSD
No
OSD Colors
8x2 Color/8-Bit Palette
TCON Output
Analog
Dual View Output
No
LVDS Input
No
LVDS Output
No
TTL Output
No
Memory Support
No
MCU
Integrated
CCFL/LED Controller
CCFL & LED
Touch-screen Controller
No
Temperature Range
-40 to +85

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