TW8806

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LCD Display Processors with built-in Video Decoder and T-CON

Device is no longer available or supported, and production has been discontinued.

Product Status: EOL

OVERVIEW

Techwells TW8806 LCD display processor is a low cost high quality TFT panel controller with an embedded NTSC/PAL/SECAM TV decoder. This unique level of mixed signal integration enables the panel to be used as a stand-alone LCD display for in car entertainment, portable DVD and portable LCD TV applications. An integrated triple analog-to-digital converter supports YPbPr/RGB component input and allows direct connection to DVD and Navigation sources. In addition, flexible digital inputs supports 24bit Digital RGB and 8/16/24-bit YCbCr inputs.

The TW8806 contains all the logic required to convert standard TV, DTV, and PC monitor signals to the digital control and data signals required to drive various TFT panel types. It supports TFT panel resolutions up to 1280 by 768 with 1- pixel/clock formats.

The chip has nine analog inputs. This enables a number of input combinations simultaneously. For example, the chip can accept up 4 CVBS inputs simultaneously.The chip can also accept one CVBS,one S-Video, one component and one analog RGB simultaneously.

The integrated analog front-end contains three ADCs with three clamping circuits and one Automatic Gain Control (AGC) circuit to minimize external component count. It employs a 4H, 5-line adaptive comb filter and proprietary Y/C processing technologies to produce exceptionally high quality pictures.

The chip's internal logic synchronizes the panel frame rate to the incoming input frame rate. A high quality image-scaling engine is used to convert the lower resolution formats or high resolution DTV formats to the output panel resolution. An internal de-interlacing engine also allows interlaced video to be supported.

On Screen Display is supported through an on-chip OSD RAM for maximum flexibility. A closed caption decoder is built in. The TW8806 also accepts a 24 bit digital RGB input from external PanelLinkTM receiver or ADCs for use as computer monitor. In addition, it accepts 8/16/24 bits digital YCbCr input for use with external ADCs for use as DTV monitor.

The TW8806 also supports TFT panel power sequencing, DPMS (VESATM Display Power Management Signaling) signaling and power management. The control interface is a 2-wire serial bus interface. The TW8806 core operates at 1.8 V, the IO at 3.3 V and packaged in a 128-pin PQFP package.

KEY FEATURES

  • Integrated high performance NTSC/PAL/SECAM video decoder
  • Built in high quality De-interlacing engine
  • Black / white / blue stretch for higher contrast
  • Favorite color enhancement
  • Integrated timing controller (T-CON) with digital and analog panel support
  • QVGA up toWXGA panel resolution support
  • Low power consumption (600 mW)
  • Small form factor 128-pin PQFP

    24bit Digital RGB and 8/16/24-bit YCbCr Inputs
  • Supports connection to analog PC Graphics cards with the addition of a 3 channel A/D converter for up toWXGA resolution
  • Supports YCbCr digital component input for DTV 480p, 720p, 1080i

    TFT Panel Support
  • Supports digital and analog LCD panels
  • Supports a wide variety of active matrix TFT panels one pixel per clock

    Timing Controller (TCON)
  • Support programmable interface signals for control column(source) driver / row(gate) driver
  • Support analog RGB output
  • Programmable VCOM output

    Analog RGB / YCbCr Inputs
  • Has direct connection to analog RGB or YCbCr input up to WVGA or 480p resolution
  • Built-in PLL support for embedded or separated sync

    Video Decoder and Processing
  • Three 9-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 allows any of the following combinations:
  • Up to 4 composite video
  • Up to 2 S-Video
  • 1 YPbPr component
  • 1 RGB

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
TW8806
Basic Information
Production Status
EOL
CVBS Input
Yes
S-Video Input
Yes
YPbPr Input
Yes
SCART Input
No
Analog RGB Input
Yes
ADC Input Frequency (MHz)
27
LVDS Input
No
MIPI-CSI2 input
No
Comb Filter
2D
Max Output Resolution
WXGA
Qualification Level
Automotive
De-Interlacer
2D
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
Digital & Analog
Dual View Output
No
LVDS Output
No
TTL Output
Yes
Secondary Output
No
Memory Support
No
MCU
External
CCFL/LED Controller
No
Touch-screen Controller
No
Recommended for new designs
Yes

Related Videos

3:42
The TW8844 is the industry's first full HD LCD video processor; it features fast boot reliability, frozen detection, and automatic contrast adjustment.
7:16
Learn how to assemble the hardware, change video source and demonstrate the MIPI loop back feature on the TW8844 evaluation boards.
1:22
This video talks about the TW88xx display processors, which enable boot up and display of video within 500 milliseconds.
3:42
The TW8844 is the industry's first full HD LCD video processor; it features fast boot reliability, frozen detection, and automatic contrast adjustment.
7:16
Learn how to assemble the hardware, change video source and demonstrate the MIPI loop back feature on the TW8844 evaluation boards.
1:22
This video talks about the TW88xx display processors, which enable boot up and display of video within 500 milliseconds.
3:42
The TW8844 is the industry's first full HD LCD video processor; it features fast boot reliability, frozen detection, and automatic contrast adjustment.
7:16
Learn how to assemble the hardware, change video source and demonstrate the MIPI loop back feature on the TW8844 evaluation boards.
1:22
This video talks about the TW88xx display processors, which enable boot up and display of video within 500 milliseconds.

Featured Design Resources


Key Differences in TW884x Family

Product Input Types ADC
Input
Freq.
(MHz)
Max
Output
Resolution
Panel
Output
SoC
Output
Pkg
Type
Technical
Highlights
CVBS Comb
Filter
S-Video Analog
RGB/YPbPr
Digital
RGB/YCbCr
LVDS
Open LDI
TW8844 Yes* 4H No No Yes
2x24-bit ports
Yes
2CH
27 1080p
1920x1080
TTL/TCON
2CH LVDS
MIPI-CSI2
v1.1
156 Ld LQFP 1080p panel support + MIPI-CSI2 output path, improved frozen detection
TW8845 Yes* 4H No No Yes
2x24-bit ports
Yes
2CH
27 1080p
1920x1080
TTL/TCON
2CH LVDS
Pseudo
BT.656
156 Ld LQFP 1080p panel support + BT656 output path, improved frozen detection
TW8836 Yes* 4H Yes Yes (1080p) Yes
24-bit
Yes
1CH
148 WXGA/720p
1366x768
TTL/TCON
1CH LVDS
Pseudo
BT.656
128 Ld LQFP 720p panel support with LVDS I/O

*Differential Supported