TW8807

Request Full Datasheet

LCD Controller with Built-In Video Decoder and TCON for Analog LCD Panels

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

Product Status: EOL

OVERVIEW

Techwells TW8807 LCD display processor is a low cost high quality TFT panel controller with an embedded NTSC/PAL/SECAM TV decoder, scaler, de-interlacer and timing controller. It is designed to support analog panels used in video applications including portable TV, rear seat car display, and portable DVD.

The TW8807 contains all the logic required to convert standard TV signals to the digital control and data signals required to drive various TFT panel types. It supports TFT panel resolutions up to WQVGA (480x234) with 1- pixel/clock formats.

The chip accepts CVBS (composite) analog input or S-video analog input for use as a video monitor. Up to four physical CVBS inputs or one S-video input can be connected.

The integrated analog front-end contains two ADCs with two 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 to the output panel resolution. An internal deinterlacing engine also allows interlaced video to be supported.

On Screen Display is supported through an on chip OSD RAM.

The TW8807 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 TW8807 core operates at 1.8 V, the IO at 3.3 V and is packaged in a 64-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 analog panel support
  • QVGA panel resolution support

    Video Decoder and Processing
  • Two 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 1 S-Video and 3 composite
  • 4-H adaptive comb filter Y/C separation

    Timing Controller (TCON)
  • Support programmable interface signals for control column(source) driver / row(gate) driver
  • Support analog RGB output
  • Programmable VCOM output
  • Dual channel charge pump output with back sensing

    TFT Panel Support
  • Supports analog LCD panels
  • Supports a wide variety of active matrix TFT panels one pixel per clock
  • Supports panel with resolution up to WQVGA (480x234)
  • Supports 3, 4, 6 or 8 bits per pixel up to 16.8 million colors
  • Supports non-linear scaling

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
TW8807
Basic Information
Production Status
EOL
CVBS Input
Yes
S-Video Input
Yes
YPbPr Input
No
SCART Input
No
Analog RGB Input
No
Comb Filter
2D
Max Output Resolution
WVGA
Qualification Level
Automotive
De-Interlacer
2D
PIP
No
OSD Type
Font
OSD Font ROM
202
OSD Font RAM
25
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
External
CCFL/LED Controller
No
Touch-screen Controller
No
Temperature Range
0 to +70

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